СПОСОБ И УСТРОЙСТВО ДЛЯ ВВОДА ЭЛЕКТРИЧЕСКОЙ ЭНЕРГИИ В ЭЛЕКТРИЧЕСКУЮ СЕТЬ ЭЛЕКТРОСНАБЖЕНИЯ

Изобретение относится к области электротехники и может быть использовано для управления генератором электрической энергии, подключенным в точке сетевого подключения к электрической сети. Техническим результатом является обеспечение стабильности сети за счет исключения потерь стабильности сети. Способ управления генератором (1) электрической энергии, подключенным в точке (2) сетевого подключения к электрической сети (4) электроснабжения, содержит этапы: регистрация по меньшей мере одного относящегося к точке (2) сетевого подключения сетевого свойства электрической сети (4) электроснабжения, управление генератором (1) таким образом, что он в зависимости от зарегистрированного сетевого свойства вводит ток в электрическую сеть (4) электроснабжения. 2 н. и 17 з.п. ф-лы, 9 ил.

СПОСОБ ПОДВОДА ЭЛЕКТРИЧЕСКОЙ ЭНЕРГИИ В ТРЕХФАЗНУЮ СЕТЬ ПЕРЕМЕННОГО НАПРЯЖЕНИЯ

Использование: в области электротехники. Технический результат - уменьшение несимметрии в трехфазной сети переменного напряжения. Способ включает в себя этапы: образование компонента системы прямой последовательности фаз, предназначенного для подвода тока, образование компонента системы обратной последовательности фаз, предназначенного для подвода тока, наложение компонента системы прямой последовательности фаз и компонента системы обратной последовательности фаз с получением предназначенного для подвода тока и подвод такого составного тока в трехфазную сеть переменного напряжения. 3 н. и 9 з.п. ф-лы, 5 ил.

СПОСОБ РАБОТЫ ВЕТРОВОЙ ЭНЕРГЕТИЧЕСКОЙ УСТАНОВКИ

Использование: в области электротехники. Технический результат - повышение надежности. Согласно способу, когда есть ветер, который имеет скорость выше начальной скорости и ниже скорости отключения, ветровая энергетическая установка поставляет электрическую энергию в сеть электроснабжения, при этом при работе ветровой энергетической установки выше номинального значения или соответственно ниже скорости отключения ротор ветровой энергетической установки вращается. С ротором соединен генератор для генерирования электрической энергии. Ветровая энергетическая установка имеет средства для измерения имеющейся в сети электроснабжения частоты, которые соединены с управляющим устройством для управления работой ветровой энергетической установки. В соответствии с изобретением предлагается, что отдаваемую генератором ветровой энергетической установки в сеть мощность быстро и в течение короткого времени повышают выше текущей мощности ветровой энергетической установки, когда частота электрической сети ...

СИСТЕМА АККУМУЛИРОВАНИЯ ЭЛЕКТРОЭНЕРГИИ, КОТОРАЯ МАКСИМИЗИРУЕТ ИСПОЛЬЗОВАНИЕ ВОЗОБНОВЛЯЕМОЙ ЭНЕРГИИ

Изобретение относится к системам аккумулирования электроэнергии, пригодным для использования в обычных домах и офисах. Система аккумулирования электроэнергии, описываемая в этой заявке, может быть просто установлена в доме или офисе и может быть интегрирована с панелями солнечных батарей, ветротурбинами или другими возобновляемыми источниками энергии. Система аккумулирования электроэнергии содержит множество аккумуляторных модулей, электрически соединенных параллельно, причем каждое множество аккумуляторных модулей имеет преобразователь, электрически соединенный с ним для образования комбинации множества аккумуляторных модулей и преобразователя, при этом преобразователь имеет выход переменного тока, соединенный с одним или более устройствами, потребляющими электроэнергию, и вход переменного тока, соединенный с электрической сетью. Технический результат - экономия электроэнергии. 3 н. и 11 з.п. ф-лы, 10 ил., 3 табл.

СПОСОБ УПРАВЛЕНИЯ ВЕТРОВЫМ ПАРКОМ

Изобретение относится к способу подачи электрической мощности имеющего несколько ветроэнергетических установок (100) ветрового парка (112) в сеть (120) электроснабжения, при этом каждая ветроэнергетическая установка (100) предоставляет электрическую мощность установки (P), и сумма всех предоставляемых мощностей (P) подается в качестве мощности парка (P) в сеть (120) электроснабжения, и для каждой ветроэнергетической установки (100) задается заданное значение (P) установки для задания подлежащей предоставлению мощности (P) установки, и заданное значение (P) установки регулируется с помощью регулятора (R, R) в зависимости от регулировочного отклонения (ΔР) в виде сравнения подаваемой парковой мощности (P) с заданным значением (P) подлежащей подаче парковой мощности (P). Изобретение направлено на координацию подачи мощности в сеть электроснабжения. 2 н. и 5 з.п. ф-лы, 4 ил.

ВОЗМОЖНОСТЬ ПОДДЕРЖАНИЯ НЕПРЕРЫВНОСТИ ЭЛЕКТРОПИТАНИЯ ДЛЯ ВЕТРЯНОЙ ТУРБИНЫ

Изобретение относится к области электротехники. Технический результат заключается в возможности поддержания непрерывности электропитания системы генератора ветряной турбины, соединенной с электрической сетью посредством преобразователя переменного тока (АС-АС) в условиях низкого напряжения в сети, когда никакая мощность не генерируется генератором ветряной турбины. Согласно изобретению система (20, 70) ветряной турбины соединена с электрической сетью (42) посредством инвертора (38), который обеспечивает поддержку напряжения (Vt) на выводах турбины к сети во время неисправности низкого напряжения сети, которая является одновременной с отсутствием выработки действительной мощности от генератора (30), путем предоставления реактивной мощности в сеть. Процессор (46) управляет инвертором для сохранения минимального напряжения на локальной DC шине (34) путем остановки вывода реактивной мощности, когда напряжение DC шины падает до порогового значения (59), которое выше заданного значения (56) отключения ...

СПОСОБ И УСТРОЙСТВО ДЛЯ ВВОДА ЭЛЕКТРИЧЕСКОЙ ЭНЕРГИИ В ЭЛЕКТРИЧЕСКУЮ СЕТЬ ЭЛЕКТРОСНАБЖЕНИЯ

... 1. Способ управления генератором (1) электрической энергии, подключенным в точке (2) сетевого подключения к электрической сети (4) электроснабжения, содержащий этапы:- регистрации по меньшей мере одного относящегося к точке (2) сетевого подключения сетевого свойства электрической сети (4) электроснабжения,- управления генератором (1) таким образом, что он в зависимости от зарегистрированного сетевого свойства вводит ток в электрическую сеть (4) электроснабжения.2. Способ по п. 1, отличающийся тем, чтогенератор (1) является децентрализованным генератором (1) и/или ветроэнергетической установкой (1) или ветроэнергоцентром, включающим в себя несколько ветроэнергетических установок, и, в частности, осуществляет ввод энергии в сеть (4) электроснабжения посредством инвертора (16) напряжения.3. Способ по любому из пп. 1-2, в котором в качестве генератора (1) применяют по меньшей мере одну ветроэнергетическую установку (1), и причем для точки (2) сетевого подключения регистрируют чувствительность ...

ВЕТРОВАЯ ЭЛЕКТРОСТАНЦИЯ С МНОЖЕСТВОМ ВЕТРОЭНЕРГЕТИЧЕСКИХ УСТАНОВОК

Изобретение относится к области ветроэнергетики. Ветроэнергетическая установка содержит размещенную на башне гондолу с ротором, генератором, выпрямителем переменного тока на стороне генератора, выпрямителем переменного тока на стороне сети, и трансформатором, причем упомянутые оба выпрямителя переменного тока на стороне постоянного напряжения электрически связаны друг с другом, и причем выпрямитель переменного тока на стороне сети связан на стороне переменного напряжения через трансформатор с местом ввода энергии сети, принимающей энергию. Каждый фазный модуль выпрямителя переменного тока на стороне сети содержит верхнюю и нижнюю ветвь (Т1, Т3 Т5; Т2, Т4, Т6) вентилей, содержащую по меньшей мере две электрически последовательно включенные двухполюсные подсистемы, и выпрямитель переменного тока на стороне генератора и выпрямитель переменного тока на стороне сети связаны друг с другом на стороне постоянного напряжения посредством кабеля постоянного тока. Таким образом, получают ветровую электростанцию ...

СПОСОБ ЭКСПЛУАТАЦИИ ВЕТРОЭНЕРГЕТИЧЕСКОЙ УСТАНОВКИ

Использование: в области электротехники. Технический результат - обеспечение возможности соразмерного ввода мощности в сеть от независимых друг от друга питающих блоков. Согласно способу ввод осуществляется посредством по меньшей мере одной ветроэнергетической установки (32) с первым питающим устройством (WP1, WP2) в точке ввода в электрическую сеть (10), и ввод осуществляется в зависимости от электрических параметров в сети (10), и измеренные значения электрических параметров или измеренные значения для определения электрических параметров регистрируются в моменты времени измерений с предопределенными временными интервалами, причем моменты времени измерений синхронизируются с внешним временным сигналом, доступным вне первого питающего устройства. 4 н. и 8 з.п. ф-лы, 5 ил.

СПОСОБ ВОССТАНОВЛЕНИЯ СЕТИ ЭЛЕКТРОСНАБЖЕНИЯ

Использование: в области электроэнергетики. Технический результат - поддержание напряжения участка сети электроснабжения во время восстановления сети электроснабжения. Изобретение касается способа восстановления сети электроснабжения оператора сети посредством по меньшей мере одной ветроэнергетической установки, причем эта сеть электроснабжения имеет первый участок сети и по меньшей мере один дополнительный участок сети, при этом первый участок сети соединен с указанной по меньшей мере одной ветроэнергетической установкой и имеет первое номинальное напряжение сети, первый участок сети через по меньшей мере одно распределительное устройство связан с указанным по меньшей мере одним дополнительным участком сети для передачи электрической энергии между участками сети, при этом указанное по меньшей мере одно распределительное устройство предназначено для того, чтобы в случае ошибки отсоединять первый участок сети от указанного по меньшей мере одного дополнительного участка сети, включающего ...

СПОСОБ ЭКСПЛУАТАЦИИ ВЕТРОЭНЕРГЕТИЧЕСКОЙ УСТАНОВКИ

СПОСОБ РАБОТЫ ВЕТРОВОЙ ЭНЕРГЕТИЧЕСКОЙ УСТАНОВКИ

... 1. Способ работы ветровой энергетической установки, при этом ветровая энергетическая установка подключена к сети электроснабжения и при работе, т.е. когда есть ветер, который имеет скорость выше начальной скорости и ниже скорости отключения, поставляет электрическую энергию в сеть электроснабжения, а именно, с желаемым или соответственно требуемым для сети электроснабжения напряжением и частотой, при этом при работе ветровой энергетической установки выше номинального значения или соответственно ниже скорости отключения, ротор ветровой энергетической установки, который имеет по меньшей мере одну лопасть ротора, вращается, при этом с ротором ветровой энергетической установки соединен генератор, который приводят в действие ротором для генерирования электрической энергии, при этом ветровая энергетическая установка имеет средства для измерения имеющейся в сети электроснабжения частоты, причем эти средства для измерения частоты сети соединены с управляющим устройством для управления работой ветровой ...

ВОЗБУДИТЕЛЬ БЛОКА ГЕНЕРИРОВАНИЯ МОЩНОСТИ, БЛОК ГЕНЕРИРОВАНИЯ МОЩНОСТИ И ОБОРУДОВАНИЕ ВЫВОДА ЭНЕРГИИ В ЭЛЕКТРИЧЕСКОЙ СЕТИ

... 1. Возбудитель блока генерирования мощности в электрической сети, отличающийся тем, что содержит:контроллер возбуждения для генерирования сигнала возбуждения согласно первому управляющему сигналу и второму управляющему сигналу, полученному таким образом;преобразователь для преобразования входной энергии из первого напряжения во второе напряжение согласно упомянутому сигналу возбуждения, и вывода его к электродвигателю, соединенному с упомянутым возбудителем блока генерирования мощности;в котором упомянутый первый управляющий сигнал является сигналом об информации текущего состояния упомянутого электродвигателя, и упомянутый второй управляющий сигнал включает в себя частоту электрической сети и/или амплитуду напряжения упомянутой электрической сети.2. Возбудитель блока генерирования мощности по п. 1, отличающийся тем, что информация текущего состояния упомянутого электродвигателя включает в себя одно или любую комбинацию из следующего: напряжение якоря электродвигателя, ток якоря электродвигателя ...

Verfahren zum Betreiben eines Kombikraftwerks bzw. Kombikraftwerk

Die Erfindung betrifft ein Verfahren zum Betreiben einer Power-to-Gas-Einrichtung, also einer Einrichtung, welche aus elektrischer Energie ein Gas, z. B. Wasserstoff und/oder Methan und/oder dergleichen erzeugt, wobei die Power-to-Gas-Einheit zur Erzeugung des Gases elektrische Energie aus einem elektrischen Netz, an welches die Power-to-Gas-Einheit angeschlossen ist, bezieht, wobei das Netz eine vorbestimmte Sollfrequenz bzw. einen Sollfrequenzbereich aufweist, wobei die Power-to-Gas-Einheit den Bezug elektrischer Leistung um einen vorbestimmten Wert reduziert oder keine elektrische Leistung bezieht, wenn die Netzfrequenz des elektrischen Netzes um einen vorbestimmten Frequenzwert unterhalb der gewünschten Sollfrequenz des Netzes liegt und/oder wenn die Netzfrequenz mit einem Frequenzgradienten, nämlich mit einer Änderung pro Zeit (f/t) fällt, deren Betrag einen vorbestimmten Änderungsbetrag überschreitet.

Verfahren zum Betrieb von Haustechnikanlagen in einem elektrischen Stromnetz

Die Erfindung betrifft ein Verfahren zum Betrieb von Haustechnikgeräten (220) und Energieerzeugern (120) in einem elektrischen Stromnetz (100). In dem elektrischen Stromnetz (100) werden elektrisch betriebene thermische Haustechnikgeräte (220) mit Strom aus einem Niederspannungsnetz (200) versorgt. Der Betrieb der Haustechnikgeräte (220) und Energieerzeuger (120) erfolgt abhängig vom Zustand des Stromnetzes. Aus primärseitigen Istwerten (410) eines sekundärseitigen Mittelspannungsnetzes (400) und aus sekundärseitigen Istwerten einer sekundärseitigen Messvorrichtung (210) des Niederspannungsnetzes (200) werden in einer Regelanlage (310) ein Regelleistungswert (R) ermittelt. Die Verfügbarkeitswerte (224.1, 224.4) der Haustechnikgeräte (220) und Energieerzeugern (120) werden an die Regelanlage (310) übermittelt und in der Regelanlage (310) die verbraucherseitigen Verfügbarkeitswerte (224.1, 224.4) mit dem Regelleistungswert (R) für den Betrieb der Haustechnikgeräte (220) und Energieerzeuger ...

Wind power plant and method for operating it has overvoltage limiter during momentary interruption in power supply

An asynchronous generator (ASM) supplies the distribution network through a generator converter (GSR), a dc link circuit (ZK), a network converter (NSR) and transformer (MST). In the event of a generator overvoltage an overvoltage limiter (BC) connected to the link circuit converts the excess energy into heat.

VERFAHREN ZUM BETREIBEN EINER WINDENERGIENANLAGE SOWIE WINDENERGIEANLAGE

Verfahren zur Kompensation von einzuspeisenden Strömen eines Windparks

Die Erfindung betrifft einen Windpark zum Einspeisen eines elektrischen Gesamtstromes an einem Netzanschlusspunkt in ein elektrisches Versorgungsnetz, wobei der Windpark wenigstens eine Windenergieanlage aufweist, die als Kompensationswindenergieanlage ausgebildet ist, und eine aktive Kompensationseinheit aufweist, um einen kompensierenden Teilstrom mit einem aufmodulierten Kompensationsanteil zu erzeugen, wobei der Kompensationsanteil von der aktiven Kompensationseinheit aufmoduliert wird, und wenigstens eine weitere Windenergieanlage aufweist, die als kompensationslose Windenergieanlage dazu eingerichtet ist, einen nicht kompensierenden Teilstrom ohne aufmoduliertem Kompensationsanteil zu erzeugen, wobei sich der kompensierende Teilstrom bzw. die kompensierenden Teilströme und der nicht kompensierende Teilstrom bzw. die nicht kompensierenden Teilströme zu dem einzuspeisenden elektrischen Gesamtstrom in einem die Windenergieanlagen verbindenden Parknetz überlagern und der kompensierende ...

Verfahren zum Betreiben einer Windenergieanlage sowie Windenergieanlage

Verfahren zum Betreiben einer Windenergieanlage mit einem von einem Rotor antreibbaren elektrischen Generator zum Abgeben elektrischer Leistung an ein elektrisches Netz (6), insbesondere dessen angeschlossene Verbraucher (8), wobei die von dem Generator an das Netz (6) abgegebene Leistung in Abhängigkeit von einer dem Netz (6) anliegenden elektrischen Spannung geregelt wird, und wobei zum Netz-Überspannungsschutz eine Leistungsabgabe erfolgt, die geringer ist als die verfügbare Generatorleistung der Windenergieanlage, dadurch gekennzeichnet, dass die reduzierte Leistungsabgabe bereits vor Erreichen eines definierten maximalen Netzspannungswertes (Umax) nach Überschreiten eines bestimmten Netzspannungswertes (P1) erfolgt.

Method for influencing current consumption of power customer by e.g. power supplier in electric power network, involves switching auxiliary electric meter by electric meter that detects total current consumption of power customers

The method involves controlling current consumers of power customers by using a switch that is switched by a power supplier or network operator. The current consumption of steered power customers is detected by an auxiliary electric meter, which is switched normally by an electric meter that detects total current consumption of the power customers. A part of the current consumption of the power customers is controlled by the switch for the power customers per energy unit, where the switch and the auxiliary electric meter are integrated in an apparatus. An independent claim is also included for a method for controlling current consumption of power customers by a power supplier or network operator.

Verfahren zum Versorgen eines elektrischen Hausgeräts aus einem Niederspannungsversorgungsnetz

Ein Verfahren zum Versorgen eines elektrischen Hausgeräts 1 mit einer Schaltungseinrichtung 8 zum Versorgen interner Verbraucher 11 aus einem Niederspannungsversorgungsnetz 5, insbesondere aus einem Netz, das aus einer Photovoltaik- oder Windkraftanlage 6 versorgt wird, mit einer Schaltungsanordnung 15 für ein Energiemanagement, durch das die internen Verbraucher 11 nach ihrem Energiebedarf klassifiziert und mit Energie versorgt werden, und mit einer Programmsteuerungsanordnung 10 und Messaufnehmern 12 für die Steuerung von Bearbeitungsprogrammen von Gütern, soll so ausgestaltet sein, dass elektrische Niederspannungsquellen 6, insbesondere solche, die mit Akkumulatoren betrieben bzw. gepuffert sind, z. B. Solar- oder Windkraftanlagen, vor zu großen elektrischen Belastungen geschützt sind. Vor allem aber sollen Bearbeitungsprogramme von programmgesteuerten elektrischen Hausgeräten 1 vor unvollständiger Beendigung geschützt werden, wenn vor oder im Verlaufe eines Bearbeitungsprogramms die ...

Method and device for alternating use of frequency converters in a wind power plant

Generator control having grid imbalance detector

A controller 101 for one or more generators, for example doubly fed induction generators (DFIG) attached to a wind-turbine 100, where each generator has voltage source converters 110, 112 connected on its rotor side for controlling the power at its output side. An imbalance detector 116 detects any imbalance in the grid served by the generators and the voltage source converters are controlled accordingly. Processing means 118 are provided for calculating the current orders for both positive and negative sequences according to a required active power output and these are communicated to the controllers of the voltage source converters. A plurality of DFIGs (e.g. a wind farm) may be provided (100a-g, Figure 2) having a system controller (200, figure 2).

System and method for protection in power installations

Electrical device

An electrical device includes a primary conducting element is connected with a secondary conducting element in a first parallel circuit. A current supply inlet and a primary load outlet are connected in series with the secondary conducting element.. A secondary load outlet is connected with the primary conducting element in a second parallel circuit. A switch is located in the first parallel circuit and switched between a first position for closing the primary conducting element to direct supply current from the current supply inlet to the secondary load outlet, and a second position opening the primary conducting element to direct current from the primary conducting element to the secondary load outlet.

Discharging arrangement for a wind turbine

Grid frequency response

Methods and apparatus to provide a response to changes in a frequency of electricity flowing in an electric power grid 100, in which a measurement system determines a frequency response characteristic of the grid, and, based on this characteristic, determines one or more trigger parameters. A power control device 800 intermittently receives one or more parameters from the measurement system, and derives a trigger frequency condition on the basis of the received parameters. The power control device determines, based on a measured frequency characteristic of electric power flowing in the grid, whether the trigger condition is satisfied. In response to a determination that the trigger condition is satisfied, the power control device is arranged to change a power flow to and/or from a power unit 119 with which it is associated. This enables an effective response to a measured change in electric power in a power grid to be provided.

Domestic & residential uninterruptible power supply

An uninterruptible power supply for domestic premises comprises a battery storage 108, AC/DC converter and a control system to allocate power to electrical appliances in the event of a power cut. The standby power supply also comprises a dedicated distribution board 100 that feeds power to appliances of high priority only, which can be provided with dedicated outlets. The UPS may further be able to control the operation of a plurality of renewable energy generators, such as a solar photovoltaic panel 105 or wind turbine 107, independently of each other to either power the domestic appliances directly or to supplement the battery storage to increase its discharge time. Preferably circuits include integrated relays that change the flow of electricity to and from the mains supply or the standby power supply as and when a power failure occurs. It also enables the renewable supplies to serve and top up the standby power device (UPS) when there is an outage or when the UPS needs topping up.

Power supply system for radio base station

Autonomous distributed AC power system.

A system for generating electric energy

A system for generating electric energy

Autonomous distributed AC power system.

A system for generating electric energy

Multiple input single output hybrid power system

Autonomous distributed AC power system.

Multiple input single output hybrid power system

A system for generating electric energy

Multiple input single output hybrid power system

Autonomous distributed AC power system.

PROCEDURE AND DEVICE FOR THE TRANSFORMATION OF WIND-PRODUCED ELECTRICITY IN ELECTRICITY WITH CONSTANT FREQUENCY FOR A SUPPLY NETWORK

PROCEDURE FOR THE OPERATION OF A WIND ENERGY PLANT WITH OVERVOLTAGES IN THE NET

OPERATING PROCEDURE FOR WIND ENERGY PLANT WITH OVER-SYNCHRONOUS CASCADE

TAX PROCEDURE OF A SODIUM AND SULFIDE BATTERY

WIND ENERGY PLANT WITH A REACTIVE POWER MODULE TO THE NET SUPPORTING AND PROCEDURE FOR IT

PROCEDURE FOR THE OPERATION OF WIND ENERGY PLANTS

PROCEDURE FOR THE OPERATION OF A WIND ENERGY PLANT WITH ONE DOUBLY FED ASYNCHRONOUS MACHINE AS WELL AS WIND ENERGY PLANT WITH ONE DOUBLES FED ASYNCHRONOUS MACHINE

ISLAND NET AND PROCEDURE FOR THE ENTERPRISE OF AN ISLAND NET

VORRICHTUNG ZUM AUFLADEN EINES AKKUMULATORS EINES ELEKTROFAHRZEUGES

Die Erfindung betrifft eine Vorrichtung (1) zum Aufladen zumindest eines aufzuladendenAkkumulators (11) eines Elektrofahrzeuges (10), umfassend eine Basis (2), die mit einerNetzstromleitung (3) verbunden ist und zumindest einen Stromanschluss (4) aufweist, anwelchen das Elektrofahrzeug (10) anschließbar ist. Um eine derartige Vorrichtung (1)anzugeben, die ortsunabhängig einsetzbar ist, zumindest teilweise alternative Energiennutzbar machen und trotzdem jederzeit für eine vollständige Aufladung des zumindesteinen aufzuladenden Akkumulators (11) des Elektrofahrzeuges (10) sorgen kann, ist erfindungsgemäß vorgesehen, dass die Basis (2) als Säule ausgebildet und mitzumindest einer Einrichtung zur Gewinnung von Sonnen- und/oder Windenergie oderdergleichen verbunden ist, zumindest einen Akkumulator (5) zum Speichern der von derzumindest einen Einrichtung zur Gewinnung von Sonnen- und/oder Windenergie oderdergleichen erzeugten Energie aufweist und zumindest eine mit dem zumindest einenAkkumulator ...

SPEISEEINRICHTUNG FÜR EIN WECHSELSTROMNETZ

Speiseeinrichtung (1) für ein, ein Batteriesystem (8) aufweisendes Wechselstromnetz (2), mit einem Wechselstromgenerator (4), zu dessen Antrieb ein im Bedarfsfall einschaltbarer Verbrennungsmotor (11) vorgesehen ist, um die Abgabe von Wechselstrom an das Netz (2) zu veranlassen, wobei in der Antriebskette (3) zum Wechselstromgenerator (4) weiters eine Elektromaschine (7,7') angeordnet ist, die direkt oder über einen Wechselrichter (14) mit dem Batteriesystem (8) und/oder einer Photovoltaikanlage (9) verbunden ist.

Sink-float separation in rotary drum appts. - with mechanical discharge of sinks and floats from high density medium

In a sink-float process (high density media segregation), the material to be dressed is conveyed to a rotary drum contg. high density separation medium and both the sedimentary matter and floating matter are discharged from the drum purely mechanically so that the high density medium remains essentially stationary. Used in the sink-float treatment of storage battery scrap, particularly the separation of casing fragments and metallic Pb. The process is carried out in a simple and compact appts. which can accommodate comparatively low throughput capacity. Heavy matter is constantly moved and kept in suspension. No circulation of high density medium is required. Sink-float separation of sedimentary matter and floating matter and the washing of the separated products are carried out in one appts. with a single drive.

WIND ENERGY PLANT WITH DOUBLES FED INDUCTION GENERATOR AND STATIC FREQUENCY CHANGER REGULATION

PROCEDURE FOR THE OPERATION OF A WIND ENERGY PLANT AS WELL AS WIND ENERGY PLANT

PROCEDURE FOR THE ENTERPRISE OF A WIND PARK

Control device and control method for direct-current micro-grid, and direct current micro-grid system

Provided are a control device and control method for a direct-current micro-grid, and a direct-current micro-grid system. The control device for a direct-current micro-grid comprises: a detection module (100) for detecting a voltage change ratio on a direct-current bus; and a regulation module (200) for regulating energy compensation of an energy compensation apparatus for the direct-current bus according to the voltage change ratio, detected by the detection module, on a direct-current bus. The control device for the direct-current micro-grid detects, by means of a detection module, a voltage change on a direct-current bus in real time, and a control module regulates, according to a detection result of the detection module, energy compensation of an energy compensation apparatus for the direct-current bus in real time, thereby improving the stability of the voltage on the direct-current bus, and thus making the direct-current micro-grid operate stably.

Power management method

Power management method The invention relates to a power management method comprising the following steps: - measuring voltages and currents of a power source (20), an electrical output (23) and a battery (21); - calculating a power generated by the power source (20), a power consumed by the electrical output (23) and a power exchanged with the battery (21); - connecting the power source (20), the electrical output (23), the battery (21) and an electrical grid (22); - transmitting, to a monitoring device, measurements of electrical generation and information on the consumption and control possibility of one or more remote systems to change priorities of power flow or to change options regarding the use of the power flow; - connecting the electrical output (23) to the power source (20), the battery (21) or the electrical grid (22) according to information on the tariff per kWh provided by the public electricity grid, such as peak and off-peak time. (Figure 1) 20 ICr -~rPFTR".Iao, C= WIArtcr ...

Apparatus and method of aggregating and supplying energy

An apparatus and method for aggregating and supplying energy includes a plurality of power modules for inverting a first type of electrical power, which is supplied to the power modules from multiple sources of power, to a second type of electrical power at an output of the power modules for delivery of the inverted power to a storage device for future use, or to an electrical load, or to a regional or central utility grid. A power microcontroller is carried by and incorporated within each of the power modules and each is configured fo controlling the power inversion operations. The power microcontrollers are configured for generating, from each of the plurality of power modules, controlled pulses of charge and discharge for increasing storage capacity of the energy storage device. A control microcontroller is configured for monitoring voltage levels within the at least one energy storage device and for rebalancing voltage within the energy storage device.

Electrical Power Distribution System for Enabling Distributed Energy Generation

An electrical power distribution system with distributed energy generation, comprising an energy processing unit (EPU) that is installed at the electrical power point of use (POU). In the present legacy electrical power generation and distribution system, the power quality delivered to end consumers is being degraded by a number of disruptive technologies and legislative impacts; especially with the rapidly increasing myriad of privately owned and operated domestic and commercial distributed energy generation (DEG) devices connected at any point across a low voltage (LV) distribution network. The electrical power distribution system with distributed energy generation of the current invention bypasses this increasing critical DEG problem in prior art. WO 2015/051757 PCT/CN2014/088325 Users Users Generator I Transfornier Generator 2 Iransformer I Generafion + L' Dtktibution I IGeneration + L VDistributionI -- Prior Art -- ...

Wind turbine generator with a low voltage ride through controller and a method for controlling wind turbine components

Alternative-source energy management

A power converter system includes a power converter system including: a DC-to-AC power converter; a first output configured to be coupled to a power grid; a first input configured to be coupled to the power grid; second outputs each configured to be coupled to a corresponding AC load; a power-grid switch coupled to the converter and to the first output; load switches coupled to the converter, the second outputs, and the first input; and a controller coupled to the load switches and to the first output and configured to determine whether energy from the power grid satisfies at least one criterion, the controller being further configured to control the power-grid switch and the load switches to couple the converter to the first output and to couple the first input to the second outputs if the at least one criterion is satisfied and otherwise to control the power-grid switch and the load switches to isolate the converter from the first output and to couple the converter to at least one of ...

Energy conversion method

Methods and apparatus for coupling an energy storage system to a variable energy supply system

METHODS AND APPARATUS FOR COUPLING AN ENERGY STORAGE SYSTEM TO A VARIABLE ENERGY SUPPLY SYSTEM A method for coupling an energy storage system to a variable energy supply system 5 includes providing an energy storage system including at least one Vanadium redox battery and at least one battery charge controller ( 104). The method also includes electrically coupling the at least one battery charge controller to the variable energy supply system such that the at least one battery is configured to supply a substantially consistent energy output during fluctuating energy loads of the energy supply system. 2 -0 1F8F12 ...

Sustainable modular structure powered by green energy

A sustainable structure is provided that is powered by a rechargeable battery that charged by alternating wind and solar energy generators.

Method for feeding electrical power into a three-phase AC voltage system

The present invention relates to a method for feeding an unbalanced, three-phase current into a three-phase AC voltage system, comprising the following steps: Production of a positive phase-sequence system for the current to be fed in, production of a negative phase-sequence system for the current to be fed in, superimposition of the positive phase-sequence system and of the negative phase-sequence system to form the current to be fed in, and feeding of the current that has been composed in this way into the three-phase AC voltage system.

Centralized power conditioning

A power plant for providing electric power to a power grid includes energy sources; power conditioning units and a controller configured to cause power provided to the grid to have selected electrical characteristics. The controller is in high speed real-time communication with the power conditioning units and programmed to provide instructions to the power conditioning units.

Method for operating a wind turbine connected to a utility grid during utility grid disturbance, wind turbine and wind park

Centralized power conditioning

A power plant for providing electric power to a power grid includes energy sources; power conditioning units and a controller configured to cause power provided to the grid to have selected electrical characteristics. The controller is in high speed real-time communication with the power conditioning units and programmed to provide instructions to the power conditioning units.

Systems and methods for interfacing renewable power sources to a power grid

Improved frequency control

The present invention relates to a method for controlling a fundamental frequency of power supply grid being operatively connected to a power supply grid, the method comprising the steps of determining a steady-state and/or a dynamic-state related parameter of the associated power supply grid, and applying said determined parameter(s) in a frequency 5 controller of the wind turbine facility in order to improve frequency control of the fundamental frequency of the power supply grid.

Systems and methods for regulating power in renewable energy sources

Control method for low voltage ride through

A control method for low voltage ride through comprises the following steps: 1）A control circuit (9) monitors a DC bus voltage of a set of frequency converters (3, 4) connected between a wind generator rotor and a power grid (12) and a voltage of the power grid; 2) If the monitored DC bus voltage of the set of frequency converters is judged to be higher than a designed value, the control circuit controls a thyristor (7) in a crowbar protection circuit connected to the wind generator rotor to be closed to obtain a shunt protection; 3) After the thyristor is closed, the control circuit controls a stator breaker (1) which is connected between a wind generator stator and the power grid to disconnect the wind generator stator and the power grid; 4) After the stator breaker disconnects the power grid and the wind generator stator, the control circuit further controls a breaker (5) of a shunt circuit to be opened firstly and then be closed, the thyristor is turned off automatically, and thus the ...

Method for operating a wind farm

Method for controlling a wind energy plant

Wind power plant

Wind farm with DC voltage network

The invention relates to a wind farm for generating electrical energy from wind, comprising at least two wind turbines for generating the electrical energy and a common infeed device for feeding the generated electrical energy, or part thereof, into an electrical supply grid, wherein the wind turbines are connected to the infeed device via an electrical DC voltage network in order for electrical energy generated by the respective wind turbine to be conducted to the infeed device by means of electrical direct current.

System and method for low speed control of polyphase AC machine

A power converter configured to improve power capture in a wind turbine during low wind speed operation is disclosed. The power converter converts the power generated by the alternator of the wind turbine into a suitable AC current for delivery to a utility grid or to an electric load independent of the utility grid. The power converter is configured to operate in multiple operating modes, utilizing both synchronous and non-synchronous control methods, to extend the operating range of the power converter. During non-synchronous operation, the power converter utilizes a modulation routine that may either vary the dead-time compensation period during a constant modulation period or vary the modulation period with a constant on-time. A seamless transfer between non-synchronous and synchronous control methods with low total harmonic distortion (THD) improves the range of power generation for wind generators.

Method for controlling an arrangement for supplying electric current to a power supply system

The invention relates to a method for controlling a supply arrangement (1), which has a wind energy installation (2), for supplying electric power to an electrical power supply system (22), comprising the following steps: electric power (P ...

Power management method

The invention relates to a power management method, characterised in that it includes the following steps: a) measuring the voltage and current of a power source (20), of an electrical output (23) and of a battery (21); b) calculating the power produced by the power source (20), the power drawn by the electrical output (23) and the power exchanged with the battery (21); c) connecting the power source (20), the electrical output (23), the battery (21) and an electrical grid (22); and d) transmitting to a monitoring device electricity generation measurements and consumption information and information on whether it is possible to remotely control a number of systems. In a step e), the electrical output (23) is connected to the power source (20), the battery (21) or to the electrical grid (22) depending on information on the mains-grid kWh unit rate, such as whether it is peak or off-peak.

Energy systems, energy devices, energy utilization methods, and energy transfer methods

System and method for low speed control of polyphase AC machine

A power converter configured to improve power capture in a wind turbine during low wind speed operation is disclosed. The power converter converts the power generated by the alternator of the wind turbine into a suitable AC current for delivery to a utility grid or to an electric load independent of the utility grid. The power converter is configured to operate in multiple operating modes, utilizing both synchronous and non-synchronous control methods, to extend the operating range of the power converter. During non-synchronous operation, the power converter utilizes a modulation routine that may either vary the dead-time compensation period during a constant modulation period or vary the modulation period with a constant on-time. A seamless transfer between non-synchronous and synchronous control methods with low total harmonic distortion (THD) improves the range of power generation for wind generators.

Audit method and system and supply method and system for PV power injection and consumption in a power grid system

A method of supplying power in a power grid, a system supplying power in a power grid, a method of consolidating power injection and consumption in a power grid, a system for consolidating power injection and consumption in a power grid, a metering system for a power grid, and a metering method for a power grid. The method of supplying power in a power grid, the method comprises determining an initial forward probabilistic power supply time profile of an aggregate intermittent power source connected to the power grid,; determining a target power demand time profile of at least one load connected to the power grid; and associating at least respective portions of the initial forward probabilistic power supply time profile and the target demand time profile such that a probability of supply of power from the intermittent power source to the load meets a specified criterion.

Power management systems with dynamic target state of charge

A power management system includes an energy storage device and a control system coupled to the energy storage device. The control system is configured to execute a control routine to determine whether to charge or discharge the energy storage device using a target state of charge and a current state of charge of the energy storage device. The control system is configured to determine that an output signal, received from a power generator, is outside of a specified range. The control system is configured to modify the target state of charge of the energy storage device in response to determining that the output signal is outside of the specified range.

Systems and methods for regulating power in renewable energy sources

Certain embodiments of the invention may include systems and methods for regulating power in renewable energy sources. According to an exemplary 5 embodiment of the invention, a method is provided for regulating active power produced by the renewable energy source (102) towards an apparent power setpoint (104). The method may include selecting (142) voltage regulation based on power factor foldback (126) or voltage foldback (138) associated with the renewable energy source (102). When power factor foldback (126) is selected (142), the method may 10 include regulating the power factor associated with the renewable energy source(102) based at least in part on a power factor angle magnitude setpoint (120), and reducing the power factor angle magnitude setpoint (120) towards zero when apparent power (124) produced by the renewable energy source (102) approaches or exceeds the apparent power setpoint (104). When voltage foldback (138) is selected, the method 15 may include regulating voltage ...

Inverter communications using output signal

Technologies for communicating information from an inverter configured for the conversion of direct current (DC) power generated from an alternative source to alternating current (AC) power are disclosed. The technologies include determining information to be transmitted from the inverter over a power line cable connected to the inverter and controlling the operation of an output converter of the inverter as a function of the information to be transmitted to cause the output converter to generate an output waveform having the information modulated thereon.

GENERATION LOAD CONTROL

This invention relates in general to a device for controlling at least one of a plurality of electrical loads, said plurality of electrical loads being supplied by at least one renewable energy generator and/or an electrical mains supply, wherein the at least one renewable energy generator derives energy from a renewable energy source. The device comprising an energy sensor for measuring an energy parameter, wherein the energy parameter equates to a value representative of the amount of renewable energy output by the energy sensor, the energy parameter of the energy sensor being directly proportional to the output of the at least one renewable energy generator; a controller means for determining the amount of electrical loads that can be connected or disconnected on the basis of the measured energy parameter; a switching device for connecting and disconnecting the at least one electrical load based on an output of the controller means; and wherein as the energy parameter varies the output ...

METHOD FOR RETROFITTING WIND TURBINE FARMS

POWER GENERATION SYSTEM INCORPORATING A VANADIUM REDOX BATTERY AND A DIRECT WIND TURBINE GENERATOR

MODULAR AC VOLTAGE SUPPLY AND ALGORITHM FOR CONTROLLING THE SAME

An AC power (Figure1) supply (10) can be connected in parallel with similar supplies to drive loads (16). Each of the AC power supplies (10) incorporates a discrete controller functioning based on parameters sensed locally and without reference to any of the other supplies.

METHOD FOR OPERATING A FREQUENCY CONVERTER OF A GENERATOR

The method relates to the operation of a frequency converter of a generator in particular of a wind energy turbine, in the event of a substantial grid voltage drop, wherein the frequency converter (10) comprises an AC/DC converter (20), to be connected to the generator (14), a DC/AC converter (22) to be connected to the voltage grid (18), and a DC link circuit (24) for connecting the AC/DC converter (20) to the DC/AC converter (22). The method comprises the step of reducing an output voltage of the DC link circuit (24) for increasing an output current of the DC/AC converter (22) and/or reducing the operation frequency of electronic switches (28) of the DC/AC converter (22) for increasing the output current of the DC/AC converter (22).

SYSTEM AND METHOD FOR MITIGATING AN ELECTRIC UNBALANCE OF A THREE-PHASE CURRENT AT A POINT OF COMMON COUPLING BETWEEN A WIND FARM AND A POWER GRID

It is described a system for mitigating an electric unbalance of a three-phase current at a Point of Common Coupling (120) being located between a wind farm (100) comprising a plurality of wind turbines (110) and a power grid. The system comprises (a) a measurement device (122) for measuring the electric unbalance at the Point of Common Coupling (120) and for providing a measurement signal (122a) being indicative for the measured electric unbalance and (b) a central wind farm controller (130) for controlling the operation of the plurality of wind turbines (110). The central wind farm controller (130) is coupled to the measurement device (122). In response to the measurement signal (122a) the central wind farm controller (130) is configured for providing a control signal (130a) for mitigating the electric unbalance at the Point of Common Coupling (120). It is further described a corresponding method for mitigating an electric unbalance of a three-phase current and a computer program for ...

POWER DISPATCH SYSTEM FOR ELECTROLYTIC PRODUCTION OF HYDROGEN FROM WIND POWER

A system for distributing electric power from a wind farm generating medium to high voltage AC electricity to multiple electrolyser modules for producing hydrogen. A system for distributing electric power from a wind farm generating medium voltage DC electricity to multiple electrolyser modules for producing hydrogen.

POWER DISPATCH SYSTEM FOR ELECTROLYTIC PRODUCTION OF HYDROGEN FROM WIND POWER

A system for distributing electric power from a wind farm generating medium to high voltage AC electricity to multiple electrolyser modules for producing hydrogen. A system for distributing electric power from a wind farm generating medi-um voltage DC electricity to multiple electrolyser modules for producing hydrogen.

METHOD FOR OPERATING A WIND TURBINE DURING A DISTURBANCE IN THE GRID

There is provided a method of operating a wind power installation. Under first operating conditions in a normal operating mode the wind power installation delivers a first power to a connected electrical network. That first power is proportional to the wind speed. The wind power installation is controlled in such a way that upon the occurrence of a disturbance it remains on the connected electrical network and delivers to the connected electrical network a second power which is lower than the first power. Upon cessation of the disturbance and under the first operating conditions a third power is briefly delivered to the connected electrical network, the third power being significantly higher than the first power.

WIND FARM POWER CONTROL SYSTEM

A method of controlling the dynamic power factor or the reactive power of a wind farm is provided. The wind farm comprises a number of wind turbines (5, 7) connected to a utility grid which is to be driven with a requested power factor or a requested reactive power. The method consists of the following steps: a) the wind farm power factor or the wind farm reactive power are measured and compared with the requested power factor or with the requested reactive power, respectively; b) the ratio of the wind farm voltage to the utility grid voltage is adjusted, c) the output voltage of the individual wind turbines (5, 7) is regulated to correspond to a specific voltage set point; and at least steps b) to c) are performed until the power factor or the reactive power of the electricity supplied by the wind farm correspond to the requested values, respectively.

METHOD FOR DETECTING LOW-FREQUENCY OSCILLATIONS AND DETECTION DEVICE FOR SAME

The invention relates to a method for detecting low-frequency oscillations, more particularly subsynchronous resonances, in an electrical supply network (306), wherein the electrical supply network (306) has a mains voltage with a rated network frequency, which method comprises the steps of: detecting at least one electrical signal of the electrical supply network (306) and evaluating the electrical signal by means of a wavelet analysis in which a time-dependent frequency pattern (420) is created by way of a correlation analysis of the detected signal with a predetermined wavelet mother function (502), wherein the presence of a low-frequency oscillation is assumed if at least one further low frequency component is present in the time-dependent frequency pattern (420) in addition to a basic component.

METHOD FOR SUPPLYING ELECTRICAL POWER

The invention relates to a method for supplying electrical power into an electrical supply network via at least one wind turbine, wherein the supply is controlled in such a way that changes to the supplied power are limited, at least one limiting gradient is provided as a limit, which determines the value of the maximum change and which sets at least one limiting gradient in accordance with a characteristic and/or an instantaneous condition of the supply network.

METHOD AND APPARATUS FOR CONTROLLING ENERGY FLOW BETWEEN DISSIMILAR ENERGY STORAGE DEVICES

The present invention provides an energy storage system that utilizes batteries of multiple compositions and provides improved load sharing between the different types of batteries is disclosed. The energy storage system includes at least two batteries, where each battery has a different chemical composition, for storing energy. One battery is configured for rapid charging/discharging and the other batter is configured for slower charging/discharging. Each battery is connected to a common connection via an energy regulator. The regulators are initially configured such that, the energy regulator connected; between the common connection and the battery configured for rapid charging/discharging responds initially to changes in power demand at the common connection. If power demand continues, the first regulator decreases the amount, of energy transferred between the first battery and the common connection while the second regulator begins transferring energy between the second battery and ...

METHOD FOR FEEDING ELECTRICAL POWER INTO AN ELECTRICITY SUPPLY NETWORK WITH A WIND PARK AND WIND PARK WITH BLACK START

The invention relates to a method for feeding electrical power into an electrical supply network (1) by means of at least one wind farm (WP1) respectively connected to the supply network via a network connection point (12), wherein the supply network (1) is to be operated at a network frequency, and each wind farm (WP1) has a plurality of wind power installations (100), comprising the steps of determining whether the electrical supply network (1) is operating, starting the at least one wind farm (WP1) in a black-start mode for the purpose of producing electrical power for feeding into the supply network (1) if the supply network (1) is not operating, operating the at least one wind farm (WP1) in black-start operation in which electrical power is fed into the supply network (1) and the supply network (1) is operated thereby, wherein the network frequency is specified by the feeding-in of the electrical power in the black-start mode and/or during black-start operation.

DETERMINING A CHARACTERISTIC OF AN INERTIAL CONTRIBUTION TO AN ELECTRIC POWER GRID

Methods, and apparatus for determining a characteristic of an inertial contribution to an electrical power grid are described. A change in inertia in the electrical power grid based on one or more inertia measurements performed in a first time period is determined. On the basis of the determined change in inertia and data indicative of an inertia contribution characteristic of one or more energy production facilities and/or one or more energy consuming devices in the electric power grid, a characteristic of an inertial contribution to the electrical power grid is determined for a second time period different to the first time period.

METHOD FOR FEEDING ELECTRICAL POWER INTO AN ELECTRICAL SUPPLY NETWORK

The invention relates to a method for feeding electric power into an electric supply network having a nominal network voltage (UNENN), which is operated using a network voltage (UGRID), wherein the electric power fed in has a reactive power component, which is predefined by a phase angle (f), which describes an angle between a current (I) and a voltage (U) of the electric power fed in, wherein the phase angle is set via phase angle control (300) which has a delay function (310), which is characterized by at least one time constant (T1).

METHOD FOR REBUILDING AN ELECTRIC SUPPLY GRID

A method for rebuilding an electric supply grid of a grid operator by means of at least one wind power installation, wherein the electric supply grid has a first grid section and at least one further grid section, wherein the first grid section is connected to the at least one wind power installation and has a first grid nominal voltage, the first grid section is coupled to the at least one further grid section via at least one switching device in order to transmit electric energy between the grid sections, wherein the at least one switching device is set up to disconnect the first grid section from the at least one further grid section in the event of a fault, comprising the steps of operating the at least one wind power installation in an observation mode if the fault occurs, wherein the wind power installation does not feed the first grid section in the observation road and a status of the first grid section is checked, and operating the at least one wind power installation in a grid rebuilding mode if the first grid section has a grid rebuilding voltage, and operating the at least one wind power installation in a normal operating mode again as soon as the fault has passed. 1. A method for rebuilding an electric supply grid by at least one wind power installation , wherein the electric supply grid includes a first grid section and a second grid section , wherein:the first grid section is coupled to the at least one wind power installation and has a first grid nominal voltage,the first grid section is coupled to the second grid section via at least one switching device in order to transmit electric energy between the first and second grid sections, and operating the at least one wind power installation in an observation mode if the fault occurs, wherein the at least one wind power installation does not feed into the first grid section in the observation mode and a status of the first grid section is checked;', 'operating the at least one wind power installation in ...

CONTROL OF A WIND POWER PLANT

The present invention relates to a method for controlling a wind power plant, WPP, comprising a plurality of wind turbine generators, WTGs, connected to an electrical grid, the method comprising: setting a plant power reference (Ptotal) according to an electrical value of the electrical grid; determining an inertia delta power reference (IRdeltaP) required for the WPP to meet a power demand in response to a change in the electrical value; adding the inertia delta power reference and the plant power reference (Ptotal) to form a power reference (Ptotalref); deriving an overboost reference (PrefOB) as the difference between the power reference (Ptotalref) and an available power value; dispatching the power reference (Ptotalref) to each wind turbine generator; dispatching the overboost reference (PrefOB) to each wind turbine generator. The invention also relates to a wind power plant control system and a wind power plant comprising a control system. 1. A method for controlling a wind power plant , WPP , comprising a plurality of wind turbine generators , WTGs , connected to an electrical grid , the method comprising:setting a plant power reference (Ptotal) according to an electrical value of the electrical grid;determining an inertia delta power reference (IRdeltaP) required for the WPP to meet a power demand in response to a change in the electrical value;adding the inertia delta power reference (IRdeltaP) and the plant power reference (Ptotal) to form a power reference (Ptotalref);deriving an overboost reference (PrefOB) as the difference between the power reference (Ptotalref) and an available power value (Pava);dispatching the power reference (Ptotalref) to each wind turbine generator of the plurality of wind turbine generators; anddispatching the overboost reference (PrefOB) to each wind turbine generator of the plurality of wind turbine generators.2. The method according to claim 1 , wherein the electrical value is a frequency value.3. The method according to ...

Installation For Transmitting Electrical Power

An installation for transmitting electrical power between a first and a second alternating voltage network. A self-commutated converter can be connected to the second alternating voltage network, and is connected to a unidirectional rectifier by way of a direct voltage connection. The unidirectional rectifier can be connected to the first alternating voltage network on the alternating voltage side, and to a wind farm via said first alternating voltage network. The farm has at least one wind turbine feeding electrical power into the first alternating voltage network when wind speeds are greater than a switch-on wind speed. An energy-generating device can be connected to the first alternating voltage network and/or to the at least one wind turbine for providing electrical energy. The energy-generating device converts a renewable primary energy from its surroundings when wind speeds are lower than the switch-on wind speed for the wind turbine. 115-. (canceled)16. An installation for transmitting electrical power between a first alternating voltage network and a second alternating voltage network , comprising:a self-commutated converter to be connected to the second alternating voltage network;a unidirectional rectifier having an alternating voltage side to be connected to the first alternating voltage network;a direct voltage connection connecting said converter to said unidirectional rectifier, said unidirectional rectifier to be connected via the first alternating voltage network to a wind farm, the wind farm having at least one wind turbine configured to feed electrical power into the first alternating voltage network at wind speeds above a given switch-on wind speed;an energy generation device for providing electrical energy to be connected to the first alternating voltage network and/or to the at least one wind turbine, said energy generation device being configured to convert a renewable primary energy from its surroundings at wind speeds below the given switch- ...

POWER PLANT

A power plant contains an internal AC voltage grid, electrical energy generation units which are connected to the internal AC voltage grid, and a HVDC transmission device, which is connected to the internal AC voltage grid, is connectable to an external AC voltage grid via a DC link and enables energy transmission from the internal AC voltage grid in the direction of the external AC voltage grid. The energy generation units feed their power into the internal AC voltage grid via a power electronics converter. The energy generation units each have a synchronization device, which is suitable for regulating the generation of the output voltage of the respective energy generation unit such that the phase angle of the output voltage has a setpoint phase angle, which is preset to the respective energy generation unit, with respect to a synchronization signal applied on the input side. 115-. (canceled)16. A power plant , comprising:an internal AC voltage grid;a multiplicity of electrical energy generation units being connected to said internal AC voltage grid, said electrical energy generation units each having at least one of a power electronics converter or a double-fed asynchronous machine with a stator and a rotor;at least one HVDC transmission device connected to said internal AC voltage grid, and being connectable to an external AC voltage grid via a DC link, said at least one HVDC transmission device enables energy transmission from said internal AC voltage grid in a direction of the external AC voltage grid;said energy generation units either feed power into said internal AC voltage grid via said power electronics converter, or feed the power into said internal AC voltage grid via said stator of said double-fed asynchronous machine, said rotor of said double-fed asynchronous machine is fed via said power electronics converter; andeach of said energy generation units having a synchronization device suitable for regulating a generation of an output voltage of a ...

Wind-solar-gas complementary and coupled power generation system and method

The present invention relates to a wind-solar-gas complementary and coupled power generation system and method. A complementary and coupled power generation control platform, a wind or solar power generation device, and a gas power generation device of the wind-solar-gas complementary and coupled power generation system are connected to one another through a power line. The complementary and coupled power generation control platform performs complementary coupling on the power generated by the wind or solar power generation device and the gas power generation device, and transmits the power generated by the wind or solar power generation device and the gas power generation device to a regional power grid. The wind or solar power generation device comprises at least one of a wind power generation device and a solar power generation device. 1. A wind-solar-gas complementary and coupled power generation system , comprising: a complementary and coupled power generation control platform , a wind or solar power generation device , and a gas power generation device , wherein the complementary and coupled power generation control platform , the wind or solar power generation device , and the gas power generation device are connected to one another through a power line , the complementary and coupled power generation control platform performs complementary coupling on the power generated by the wind or solar power generation device and the gas power generation device , and transmits the power generated by the wind or solar power generation device and the gas power generation device to a regional power grid , and the wind or solar power generation device comprises at least one of a wind power generation device or a solar power generation device.2. The wind-solar-gas complementary and coupled power generation system according to claim 1 , wherein the gas power generation device comprises at least one of a gas turbine generator claim 1 , a gas internal combustion engine ...

SYSTEM FOR DISTRIBUTING AND STORING ELECTRIC ENERGY

The present invention refers to a system () for distributing and storing electric energy, comprising: - a first input terminal () connectable to a fixed electric network () for withdrawing electric energy from the latter; a second input terminal () connected or connectable to an electric energy source () alternative to the fixed electric network, particularly a renewable energy source, for withdrawing electric energy from the latter; an output terminal () for delivering electric energy to one or more users (); a first input/output terminal () connected or connectable to a first storage system () for storing electric energy in the latter and for withdrawing stored electric energy from the same; a second input/output terminal () connected or connectable to a second storage system () for storing electric energy in the latter, and withdrawing stored electric energy from the same, the second storage system () being of a type different from the first storage system (); a control module () configured in order to deliver electric energy to one or more users () by withdrawing it until it is reached an instant required quantity with the following sequence: ) from the alternative electric energy source (); ) from the first storage system (); ) from the second storage system (); ) from the fixed electric network (). 5100310110789101105109. System () according to claim 1 , wherein said control module () is configured so that if the instant energy quantity required by the users () is greater than the instant energy quantity available from the alternative electric energy source () claim 1 , and both the first () and second storage systems () are completely discharged claim 1 , or have a remaining charge less than or equal to a predetermined minimum charge level claim 1 , the electric energy for the users () is withdrawn from the fixed electric network () and/or from the auxiliary generation system ().6100899. System () according to claim 1 , wherein said first storage system () is ...

Emergency Load Management Using A DC Microgrid During Grid Outage

A DC building electrical system includes a DC power consuming device connected to a DC bus. A source of DC power is connected to the DC bus and powers the DC power consuming device. An energy storage device is connected to the DC bus and to a DC emergency load. The energy storage device powers the DC power consuming device in conjunction with the source of DC power, and powers the DC emergency load when source of power other than the energy storage device is available to the DC power consuming device. 1. A power distribution system for a building comprising:a direct-current (DC) bus;an alternating current (AC) bus;a first group of power consuming devices connected to the DC bus and configured to receive DC power from the DC bus;a second group of power consuming devices connected to the AC bus and configured to receive AC power from the AC bus;at least one energy storage device connected to the DC bus via a switching device, the switching device being configured to charge the at least one energy storage device by drawing DC power from the DC bus and discharge the at least one energy storage device to provide DC power to the DC bus;a DC power supply connected to the DC bus, the DC power supply being configured to provide DC power to the DC bus by converting AC power from an electrical grid;a inverter connected between the DC bus and the AC bus, the inverter being configured to provide AC power to the AC bus by converting DC power from the DC bus; anda control system operatively connected to the inverter and configured to, in response to an outage of the electrical grid, operate the inverter to provide power to the AC bus from the DC bus.2. The power distribution system according to claim 1 , further comprising:a photo-voltaic array configured to generate DC power, the photo-voltaic array being operatively connected to the DC bus to provide the generated DC power to the DC bus.3. The power distribution system according to claim 1 , wherein the control system is ...

Serial Hybrid Microgrid with PPSA-mediated interface to Genset and to Non-Dispatchable Power

A microgrid system in which power from a non-dispatchable energy source and power from a combustion-powered backup generator are both connected to the microgrid and its loads through a Power Packet Switching Architecture (PPSA) power converter. The converter provides voltage management and synchronization for both the backup generator power and also for the non-dispatchable power. 1. A microgrid , comprising:a power-packet-switching power converter, having one port thereof connected to a microgrid power line;an engine-powered generator having a power output connected to a second port of the converter; anda non-dispatchable power source connected to a third port of the converter;wherein the engine-powered generator, when active, is allowed to vary the frequency of power at the second port over a range of at least 2% of its value, and is allowed to vary the voltage of the power output over a range of at least 10% of its value.2. The microgrid of claim 1 , wherein the non-dispatchable power is photovoltaic power.3. The microgrid of claim 1 , wherein the non-dispatchable power is wind power.4. The microgrid of claim 1 , wherein the AC generator includes a diesel engine.5. A microgrid claim 1 , comprising:a power-packet-switching power converter, having one port thereof connected to a microgrid power line;an engine-powered generator having a power output connected to a second port of the converter;a non-dispatchable power source connected to a third port of the converter; anda battery bank operatively connected to the non-dispatchable power source and to the third port;wherein the engine-powered generator, when active, is allowed to vary the frequency of power at the second port over a range of at least 2% of its value, and is allowed to vary the voltage of the power output over a range of at least 10% of its value.6. The microgrid of claim 5 , wherein the non-dispatchable power is photovoltaic power.7. The microgrid of claim 5 , wherein the non-dispatchable power is ...

Uninterruptible Power Supply Systems and Methods Using Isolated Interface for Variably Available Power Source

An uninterruptible power supply (UPS) system includes a first port configured to be coupled to an AC power source and a second port configured to be coupled to a load. The system also includes a UPS circuit including a first converter circuit coupled to the first port, a second converter circuit coupled to the second port and a DC bus coupling the first converter circuit to the second converter circuit and configured to be coupled to an auxiliary power source and a third converter circuit coupled to the second port and configured to receive power from a variably available power source. The system further includes a control circuit operatively associated with the UPS circuit and the third converter circuit and configured to cooperatively control the UPS circuit and the third converter circuit to selectively transfer power to the load from the AC power source and the variably available power source and from the variably available power source to the AC power source. 1. (canceled)2. A system , comprising:an uninterruptible power supply (UPS) configured to selectively couple a load to a first power source and a second power source;a converter circuit configured to be coupled to the load in parallel with the UPS and to provide power to the load from a third power source; anda control circuit configured to control the UPS and the convener circuit to transfer power from the third power source to the first power source via a power transfer path including the converter circuit and the UPS.3. The system of claim 2 , wherein the UPS comprises a first UPS and wherein the converter circuit is included in a second UPS.4. The system of claim 3 , wherein the first UPS and the second UPS comprise respective first and second UPS modules having a common architecture.5. The system of claim 3 , wherein the first power source comprises a utility power source claim 3 , wherein the second power source comprises an energy storage device claim 3 , and wherein the third power source comprises ...

METHOD FOR AVOIDING VOLTAGE INSTABILITY IN AN ELECTRICAL GRID OF AN OFFSHORE WIND PARK

Method for avoiding voltage instability in an electrical grid of an offshore wind park, the offshore wind park electrical grid being connected at a first end of a high voltage alternating current (HVAC) transmission and the main land electrical grid being connected at a second end of the HVAC transmission, each of the wind turbines being connected to the wind park electrical grid, the method comprises determining a main land phase angle at or near the second end of the HVAC transmission; measuring an individual wind turbine phase angle at one or more wind turbines; determining the difference between each of the measured individual wind turbine phase angles and the main land phase angle; and determining whether the difference between one of the measured individual wind turbine phase angle and the main land phase angle exceeds a threshold phase angle difference. 114-. (canceled)15. A method for predicting a voltage instability in an electrical grid of an offshore wind park , the offshore wind park electrical grid being connected at a first end of a high voltage alternating current transmission and a main land electrical grid being connected at a second end of the high voltage alternating current transmission , andthe offshore wind park having a plurality of wind turbines connected to the wind park electrical grid, the method comprising:determining a main land phase angle at or near the second end of the high voltage alternating current transmission,measuring an individual wind turbine phase angle at one or more of the wind turbines,determining a difference between each of the one or more measured individual wind turbine phase angles and the main land phase angle,determining a threshold phase angle difference, andpredicting voltage instability when at least one of the differences between the measured individual wind turbine phase angles and the main land phase angle exceeds the threshold phase angle difference.16. The method according to claim 15 , wherein the main ...

METHOD AND SYSTEM FOR CONTROLLING THE ACTIVE POWER OUTPUT OF A WIND FARM

A method for controlling an active power output in a wind farm comprises inputting a setpoint of the active power into a ramp and limiting unit to determine an internal active power setpoint. Inputting the internal active power setpoint into a distributing unit configured to calculate a modeled active power setpoint of the wind farm. Determine by a subtraction element, a control difference that is a difference between the modeled active power setpoint and an actual value of the active power output of the wind farm. Determine a controller setpoint variable and calculating an overall setpoint variable from the controller setpoint variable and the feed-forward control variable. Splitting the overall setpoint variable for models of the wind turbines and determining using the wind turbine models the modeled active power setpoint of respective wind turbines depending on a portion of the active power setpoint. 1. A method for controlling an active power output (P) in a wind farm with at least two wind turbines whose power output is each controlled by a wind turbine controller , the method comprising;{'sub': set', 'set,global', 'set, 'inputting a setpoint of an active power (P, P) into a ramp and limiting unit to determine an internal active power setpoint (P);'}{'sub': 'set', 'claim-text': [{'sub': set', 'siml,1', 'siml,2', 'siml,n, 'split the internal active power setpoint (P) into active power setpoints for simulation by individual wind turbines (P, P. . . , P),'}, {'sub': simO,1', 'simO,2', 'simO,n, 'receive modeled active power setpoints of individual wind turbines (P, P, . . . , P), and'}, {'sub': set', 'simO,1', 'simO,2', 'simO,n, 'calculate a modeled active power setpoint of the wind farm (P′) from the received active power setpoints of the wind turbines (P, P, P);'}], 'inputting the internal active power setpoint (P) into a distributing unit, wherein the distributing unit is configured to,'}{'sub': set', 'act, 'determining by a subtraction element, a control ...

GREASE CHANNEL FOR REDUCING GAS PERMEATION INTO VACUUM CHAMBERS

A flywheel device includes an enclosure, a top plate that fastens to the enclosure, where the top plate includes a first opening, and a cap, where the cap has a top side and a bottom side, which when fastened to the first opening forms a seal between the bottom side and the first opening, the bottom side including an o-ring groove configured to hold an o-ring, a grease channel concentric with the o-ring groove, and an inlet port configured to enable grease to flow into the grease channel. 1. A device comprising:an enclosure;a plate that fastens to the enclosure, wherein the plate includes a first opening; and an o-ring groove configured to hold an o-ring; and', 'a grease channel concentric with the o-ring groove and configured to hold grease to reduce permeation of gas into the enclosure., 'a cap, comprising a top side and a bottom side, which when fastened to the first opening forms a seal between the bottom side and the first opening, the bottom side comprising2. The device of further comprising an inlet port configured to enable grease to flow into the grease channel.3. The device of wherein the inlet port is a channel configured to enable grease to be injected into an opening on the top side of the cap and flow through an opening into the grease channel on the bottom side of the cap.4. The device of wherein the grease channel further comprises an outlet port configured to enable grease to escape from the grease channel.5. The device of wherein the outlet port is a channel configured to enable grease to flow from an opening in the grease channel on the bottom side of the cap out of an opening on the top side of the cap.6. The device of wherein the o-ring groove and the grease channel are circular.7. The device of wherein the grease channel is exterior to the o-ring channel.8. The device of wherein the grease channel is interior to the o-ring channel.9. The device of wherein the o-ring is elastomeric.10. The device of wherein the o-ring is steel.11. The device of ...

System and method for managing the delivery of electric power

A system for managing delivery of electric power includes at least one source of electric power supplying an aggregate amount of available power and a plurality of electrical loads, each having a priority designation. There is a power management system electrically connected to the source of electrical power and to the plurality of electrical loads. The power management system monitors electrical power demanded by the electrical loads and the aggregate amount of available power of the at least one source of electric power. When the power management system determines that the aggregate demanded power exceeds the aggregate amount of available power, the power management system continues to provide power to each of said electrical loads but at a power level which is less than demanded to one or more of said plurality of electrical loads based on the priority designation of each of said electrical loads.

Hybrid Energy System For General Applications

The Hybrid Energy System for onshore and for offshore applications to include buildings infrastructure, and vessels respectively an assortment one or more arrays of integrated piezoelectric devices, wind turbine array and solar panels characterized in that they are to produce renewable energy for on demand use and for battery bank storage. Accordingly the onshore application includes a kinetic energy turbine farm, and also offshore methods for kinetic energy turbine farms, mega buoys and mega vessels to supply extra electric energy to other vessels and to shunt net power to utility grid companies, and mega-barges produce net power in onboard giant battery bank containers to rent by shipping to utility consignment locations coastally. 1. The hybrid energy system for onshore and offshore applications comprising:a first piezoelectric power generation system including; a piezoelectric device comprising wherein a assortment of crystals or other sustainable element to generate friction, a flexible coating comprising at least one of silicon, polymer, or another composite make, the flexible coating characterized in that the piezoelectric device is formed in various shapes and sizes, and methodologies for the piezoelectric devices to be activated by wind, water, also by pressurized force to generate electricity power, respectively the piezoelectric array to also include an array of power cable and connections,a second wind turbine array comprising contrivances: a framework, a dual axis rod, a blade, a first generator and a second generator, at least one blade, electrical wiring, bearing coupling, an electromagnetic link coupling for braking, a gear box, a nacelle encasement, an anchor cable, brackets, and a control system and a control method to engage at least one generator or engage both generators, characterized that during low wind speed the second generator is disengaged via the electromagnetic link coupling, the control system process is comprising wherein a means to ...

METHOD FOR USE OF STATIC INVERTERS IN VARIABLE ENERGY GENERATION ENVIRONMENTS

A system and method to collect energy from generation systems such as, for example, wind farms or solar farms with widely distributed energy-generation equipment. In some cases, static inverters are used to feed the energy directly into the power grid. In some other cases, back-to-back static inverters are used create a high-voltage DC transmission line to collect power from multiple generation sites into one feed-in site. 1. A method of generating energy , comprising:producing a first direct current via one or more variable energy collecting units;delivering the first direct current to a first static inverter via a bus;converting the first direct current to an alternating current via the first static inverter;delivering the alternating current to a second static inverter; andconverting by the second static inverter the alternating current to a second direct current having a voltage configured for transmission to a master static inverter.2. The method of claim 1 , wherein a controller interfaces among a grid measurement claim 1 , the master static inverter claim 1 , and the one or more variable collecting units.3. The method of claim 1 , further comprising:filtering a waveform of the alternating current.4. A method of generating energy claim 1 , comprising:modifying an energy output of variable energy collectors by a first controller controlling outputs of the variable energy collectors;routing the modified energy output of the variable energy collectors to a static inverter;converting the electrical energy output to a first alternating current by the static inverter;converting, by a transformer and a balancing transformer, the alternating current to a second alternating current with a predetermined voltage;receiving measurements of a voltage phase on a grid; andcontrolling timing of switches of the static inverter in accordance with the5. The method of claim 4 , further comprising:outputting by the static inverter a current at the predetermined voltage.6. The ...

ENHANCED SYSTEMS AND METHODS FOR USING A POWER CONVERTER FOR BALANCING MODULES IN SINGLE-STRING AND MULTI-STRING CONFIGURATIONS

Apparatuses and methods include a solar array having one or more string buses of series-connected solar modules. The current outputs from the solar modules on each string bus can be balanced along with the voltage output from the string buses. Local management units coupled between the solar modules and the string buses are configured to control the voltage output from each solar module. When the solar modules on each string are balanced, and when the string buses are balanced (or before the solar modules and string buses are balanced), an inverter or other device connected to the solar array can find the array's maximum power point via a maximum power point tracking algorithm. 1. A photovoltaic system , comprising:a plurality of photovoltaic modules; each respective module in the photovoltaic modules generates electric power;', 'a respective management unit in the plurality of management units is connected to the respective module to receive the electric power as an input and generate a power output from the input; and', 'power outputs of the plurality of management units are connected in series;, 'a plurality of management units coupled with the plurality of photovoltaic modules respectively, wherein'}wherein the power outputs of the plurality of management units have respective maximum currents in current-voltage output characteristics of the power outputs of the plurality of management units; andwherein the plurality of management units are configured to match the respective maximum currents with each other by adjusting the current-voltage output characteristics of the power outputs of the plurality of management units.2. The photovoltaic system of claim 1 , further comprising:a maximum power point tracker coupled to a series connection of the power outputs of the plurality of management units, the maximum power point tracker configured to track a maximum power point of the series connection as a whole.3. The photovoltaic system of claim 2 , wherein the ...

POLE-MOUNTED POWER GENERATION SYSTEMS, STRUCTURES AND PROCESSES

Solar power systems and structures are mountable to a power distribution structure, e.g. a power pole or tower, which supports alternating current (AC) power transmission lines. An exemplary power generation structure is fixedly attached to and extends from the power distribution structure, and comprises a mounting rack. A solar array, comprising at least one solar panel, is affixed to the mounting rack. A DC to AC invertor is connected between the DC outputs of the solar array and the AC power transmission lines. The length of the solar array is generally in alignment with the power distribution structure, and the width of the solar array is greater than half the circumference of the power distribution structure. The mounting rack and solar array may preferably be rotatable, such as based on any of location, time of day, or available light. 1. A system , comprising:a mounting structure that is configured for attachment to a power distribution structure, wherein the power distribution structure is configured to support alternating current (AC) power transmission lines that are connected to a power grid, wherein the power distribution structure has a defined axis and a defined circumference, wherein the mounting structure includes a mounting rack that is configured to extend from the power distribution structure;a solar array comprising at least one solar panel that is affixed to the mounting rack, and DC outputs extending from the solar array; andan DC to AC invertor connected between the DC outputs of the solar array and the AC power transmission lines2. The system of claim 1 , wherein the solar array has a defined length and width.3. The system of claim 2 , wherein the length of the solar array is generally aligned with the defined axis of the power distribution structure.4. The system of claim 2 , wherein the width of the solar array is greater than half the circumference of the power distribution structure.5. The system of claim 1 , wherein the mounting rack is ...

POWER INTERCHANGE MANAGEMENT SYSTEM AND POWER INTERCHANGE MANAGEMENT METHOD

A communicating unit of a power interchange management system is coupled to a plurality of power interchange apparatuses that control electrical equipment to Each power interchange apparatus is coupled via a system power supply line A computing unit creates a group for interchanging power by acquiring prescribed pieces of information to from the respective power interchange apparatuses and selecting a plurality of prescribed power interchange apparatuses based on the prescribed pieces of information. Prescribed conditions include a condition related to control power. The condition related to control power may be that a first power interchange apparatus on a power transmitting side has power for power transmission control necessary for transmitting power and, at the same time, a second power interchange apparatus on a power receiving side has power for power reception control necessary for receiving power. 1. A power interchange management system which manages power interchange , the power interchange management system comprising:a communication unit;a storage unit; anda computing unit that is coupled to the communication unit and the storage unit,wherein the communication unit is coupled, via a communication network, to a plurality of power interchange apparatuses each controlling a power supply-demand state of electrical equipment under management of the power interchange apparatus, and wherein the respective power interchange apparatuses are electrically coupled via a system power supply line, and acquire prescribed information from each power interchange apparatus via the communication unit;', 'store each piece of acquired prescribed information in the storage unit; and', 'create a group for interchanging power by selecting a plurality of prescribed power interchange apparatuses from the respective power interchange apparatuses based on the prescribed information stored in the storage unit., 'wherein the computing unit is configured to execute a prescribed ...

POWER GENERATION PREDICTION SYSTEM AND A METHOD THEREOF

A power generation prediction system using a first neural network and a second neural network is provided, and the first neural network is connected to the second neural network. The first neural network receives first input data, and generates the amount prediction data according to the first input data. The first input data is used to determine amount prediction data, and the amount prediction data is used to determine power generation prediction data. The second neural network receives the amount prediction data, and calculates the power generation prediction data according to the amount prediction data. When a device in a selected area is deteriorated or reinstalled, the second neural network is fine-tuned and trained again. 1. A power generation prediction system , applicable to an area where a plurality of devices are installed for power generation with a power generation conversion curve , and the power generation prediction system comprising:a first computing device configured to receive first input data, and use a first neural network to generate amount prediction data according to the first input data, wherein the first input data comprises meteorological data and used to determine the amount prediction data, and the amount prediction data is used to determine power generation prediction data;a second computing device connected to the first computing device and configured to receive the amount prediction data, and use a second neural network to perform an approximation function to calculate the power generation prediction data according to the amount prediction data; anda third computing device connected to the second computing device, and configured to receive second input data, and use a third neural network to generate a power generation module parameter prediction data according to the second input data, wherein the second input data is used to determine the power generation module parameter prediction data, and the power generation module parameter ...

MULTI-TERMINAL DC POWER SYSTEMS EMPLOYING AUTONOMOUS LOCAL CONTROL METHODS

A multi-terminal DC power system includes: a DC network connecting together multiple terminals. Each terminal is represented by one of: a voltage source converter having a capacitor at an interface to the DC network, wherein a difference between a converter-side current and a network-side current charges the capacitor, and a current source converter having an inductor at an interface to the DC network, wherein a difference between a converter-side voltage and a network-side voltage drives current through the inductor. A local controller for each terminal directly controls the converter-side current of each voltage source controller and the converter-side voltage of each current source converter, independent of the terminals, leaving network-side currents and voltages to be determined by the network, resulting in simplified terminal control and avoidance of the need for high-speed communication among all terminals at all times. 2. The multi-terminal DC power system of claim 1 , wherein each terminal comprises a source or a load claim 1 , and voltage source converters and current source converters of the system support bidirectional power flow.3. The multi-terminal DC power system of claim 1 , wherein claim 1 , regardless of network topology claim 1 , the local controller controls converter-side current of a voltage source converter in one or a combination of the following modes:constant power in which the converter-side current is controlled such that the product between the converter-side current and the terminal voltage follows a given power reference;constant current in which the converter-side current is controlled to follow a current reference which is independent of terminal voltage;current droop in which the converter-side current is controlled to follow variation in the terminal voltage by a droop characteristic; andconstant voltage in which the converter-side current is controlled to keep the terminal voltage constant, and wherein the terminal voltage ...

Power Providing Apparatus for Use with Multiple Electricity Sources

A power providing apparatus includes a first input port for connection to a first electricity source, a second input port for connection to a second electricity source, an output port, a first current control component connected between the first input port and the output port, and a second current control component connected between the second input port and the output port. Based on voltages associated with the first electricity source and the second electricity source, each of the first and the second current control components makes or breaks a current path from a respective one of the first and second input ports to the output port. 1. A power providing apparatus configured for use with a first electricity source and a second electricity source , and configured to provide electric power to a load , the power providing apparatus comprising:a first input port for electrical connection to the first electricity source;a second input port for electrical connection to the second electricity source;an output port for electrical connection to the load;a first current control component having an input terminal coupled electrically to the first input port, and an output terminal coupled electrically to the output port; anda second current control component having an input terminal coupled electrically to the second input port, and an output terminal coupled electrically to the output port;wherein:when a voltage inputted to the first current control component and associated with the first electricity source is greater than a voltage inputted to the second current control component and associated with the second electricity source by a predetermined difference, the second current control component breaks a current path from the second input port to the output port, and the first current control component makes a current path from the first input port to the output port;when absolute value of a difference between the voltage inputted to the first current control component ...

METHOD AND APPARATUS FOR POWER MANAGEMENT USING DISTRIBUTED GENERATION

Embodiments relate to a method and system for power demand shaping (PDS) so as to manage power generation and use. Specific embodiments relate to data center power demand shaping to achieve high-performance low-overhead data center operation. Specific embodiments can incorporate standard (utility power) energy sources, renewable energy sources, or a combination of standard (utility power) energy sources and renewable energy sources. Embodiments of the subject PDS techniques can incorporate trimming the data center load power so as to allow DG systems to follow the power demand efficiently and/or incorporate two adaptive load tuning schemes that can boost data center performance and enable near-oracle operation during power demand trimming process. To implement a cross-layer power optimization scheme, embodiments of the subject invention relate to a power management module that can reside between front-end distributed generation and back-end computing facilities to provide a coordinated tuning between the supply and load. 1. A method for managing a power generation system and at least one load , comprising:providing a power demand controller; andproviding an energy management module,controlling one or more of at least one power usage used by a corresponding at least one load during a control period via the power demand controller, wherein the power demand controller controls the one or more of the at least one power usage such that a total power usage used by the at least one load during the control period is less than or equal to a power generation level for the control period;{'sup': th', 'th, 'controlling one or more of at least one power output of a corresponding at least one power generator during the control period via the energy management module, wherein the energy management module controls the one or more of the at least one power output such that a total power output of the at least one power generator during the ncontrol period is at least the power ...

CONVERTER STATION WITH DIODE RECTIFIER

A converter station for the transmission of electrical power includes a converter with a DC connection terminal and an AC connection terminal, and at least one transformer connected to the AC connection terminal. In order to render the converter station as cost-effective as possible, the station is distributed over at least two independent supporting structures. 118-. (canceled)19. A converter station for transmitting electrical power , the converter station comprising:a converter having a DC-voltage connection and an AC-voltage connection;at least one transformer connected to said AC-voltage connection of said converter; andat least two support structures erected independently of one another and supporting the converter station distributed over said at least two support structures.20. The converter station according to claim 19 , wherein said converter and at least one said transformer are disposed on mutually different support structures.21. The converter station according to claim 19 , wherein said support structures are disposed to project from a body of water and at least one of said support structures is a wind-turbine support structure configured and dimensioned to hold a wind turbine.22. The converter station according to claim 19 , wherein said converter has a plurality of DC-voltage side series-connected or parallel-connected partial converters claim 19 , and wherein said partial converters are held at least partially on mutually different said support structures.23. The converter station according to claim 22 , wherein said at least one transformer comprises a plurality of partial transformers and each said partial converter is connected on an AC-voltage side to a respective partial transformer.24. The converter station according to claim 23 , which comprises a partial encapsulation housing commonly housing said partial converter and said partial transformer.25. The converter station according to claim 22 , wherein each partial converter has two DC- ...

CONTROLLABLE DISTRIBUTED ENERGY APPLIANCES AND DEVICES

Various embodiments provide appliances and electronic devices and methods implemented in such appliances and electronic devices to improve Demand Response (DR) capabilities and responses while mitigating interrupts to services provided to consumers. Various embodiments improve on DR systems by equipping a variety of electronic devices and appliances with integrated internal energy storage (e.g., battery), control and communication capabilities that enable responding to DR events by splitting power drawn by the devices or appliances between the grid and the integrated internal energy storage. Some embodiments further improve on conventional DR systems by enabling utilities to recharge batteries in electronic devices and appliances when power on the grid exceeds demand, thereby enabling utilities to increase demand when required in order to better balance power demands with power generation. Such may support the grid by increasing or decreasing load on the grid in response to grid frequency. 1. A method for controlling energy usage of an appliance with an integral internal energy store by a processor within a control device , comprising:receiving a demand response signal from a utility; controlling the appliance to reduce power drawn from the electrical grid; and', 'providing power to the appliance from an integrated internal energy store such that the appliance is partially powered by the electrical grid and partially powered by the integrated internal energy store;, 'in response to receiving the demand response signaldetermining a grid frequency; andsupplying power onto the electrical grid at a correct frequency by drawing power from the integrated internal energy store in response to determining that the grid frequency is exhibiting an under-frequency event.2. The method of claim 1 , further comprising:receiving electricity rate information from the utility;determining whether electricity rates are favorable; and connecting the appliance to the grid if not already ...

MOBILE RENEWABLE ENERGY POWER GENERATOR, MANAGEMENT SYSTEM, AND DISTRIBUTED ENERGY RESOURCES

An apparatus, system, and method are disclosed for generating, storing and managing stored power from renewable resources. The apparatus includes a portable power generator that generates, distributes, and leverages power. The apparatus leverages power by converting alternating current to direct current and distributing power systematically. In this manner, stored power is utilized more efficiently, and the advantages of a steady direct current are realized. Only the minimal power required is generated, thereby protecting sensitive electrical devices from power fluctuations. The apparatus also detects and alerts to fluctuations in voltage and current. The apparatus can link with other power generators to form a multiplier effect for the wattage. The apparatus recharges from a renewable energy power source to eliminate the need for fossil fuels and reduce pollution and noise. 1. A power generator for storing , managing and distributing electrical current derived from renewable energy , the generator comprising:a rigid polymeric housing defining two or more recesses, including an output panel recess for receiving an output panel and an input panel recess for receiving an input panel, the rigid polymeric housing further defining two semicircular recesses, each semicircular recess for receiving a wheel;two wheels affixed to an axle, the axle driven by an electric adjustable-speed drive control system which comprises a motor and a controller, the controller comprising a twist handle rotatable to apply increasing torque to the axle;an inverter; a nonconductive polymeric faceplate having a planar top surface;', 'four NEMA 110 volt A/C sockets recessed into the faceplate, each of the four NEMA 110 volt A/C sockets having a maximum output capacity of one of 15 amps and 20 amps;', 'one or more 220 volt A/C sockets recessed into the faceplate, the 220 volt A/C sockets having a maximum output capacity of 60 amps;', 'one or more 110 volt A/C sockets recessed into the faceplate, ...

METHOD FOR CONTROLLING AN ELECTRICAL DISTRIBUTION NETWORK

A method for controlling an electrical distribution network, wherein a network control station is provided to control the electrical distribution network and the electrical distribution network comprises a plurality of balancing areas, wherein each balancing area outputs or receives an exchange power to or from the electrical distribution network, and wherein at least one of the balancing areas has at least one generator, in particular a wind farm, for generating a generator power and additionally at least one consumer for receiving a consumer power, wherein at least one balancing area controller is provided to control the at least one generator or wind farm, and the method comprises the following steps: reception by the balancing area controller from the network control station of a value of an exchange power to be set, wherein the exchange power is defined as a difference between the consumer power and the generator power, drawing up by the balancing area controller of a deployment plan for adherence to or attainment of the exchange power to be set, wherein the deployment plan is provided to control the generators and consumers and is drawn up in such a way that a difference between the attained exchange power and the exchange power to be set is minimal, and generation of electrical power by means of the at least one generator or wind farm depending on the deployment plan. 1. A method for controlling an electrical distribution network , wherein a network control station is configured to control the electrical distribution network and the electrical distribution network comprises a plurality of balancing areas , wherein each of the plurality of balancing areas is configured to output or receive an exchange power to or from the electrical distribution network , wherein at least one of the plurality of balancing areas has at least one generator configured to generate a generator power and has at least one consumer configured to receive a consumer power , and wherein ...

DC MICROGRID FOR INTERCONNECTING DISTRIBUTED ELECTRICITY GENERATION, LOADS AND STORAGE

A device includes an energy unit coupled to an energy device and adapted to couple a pair of split DC rails. A controller senses the voltage on the DC rails and regulates its output current response by means of an autonomous current response that creates the aggregate effect of controlling the rail voltage in cooperation with other units coupled to the DC rails. A system includes multiple such devices coupled to split DC rails.

POWER SUPPLY SYSTEM CAPABLE OF SWITCHING CONTROL POWER SOURCE OF POWER CONTROL MODULE

A power supply system includes a power conversion circuit, a conversion control circuit, an auxiliary power module, an electricity supply module and a power supply control circuit. The power conversion circuit converts an input power into an output power used as an output of the power supply system. The conversion control circuit is arranged for controlling an operation of the power conversion circuit according to a control power. The auxiliary power module is arranged for selectively outputting a first electrical power to the conversion control circuit. The electricity supply module is arranged for providing a second electrical power. The power supply control circuit is coupled to the auxiliary power module and the electricity supply module, and arranged for referring to at least the second electrical power to determine whether to provide the first electrical power or the second electrical power as the control power for the conversion control circuit. 1. A power supply system , comprising:a power conversion circuit, for converting an input power into an output power, wherein the output power is used as an output of the power supply system;a conversion control circuit, coupled to the power conversion circuit, the conversion control circuit arranged for controlling an operation of the power conversion circuit according to a control power;an auxiliary power module, coupled to the conversion control circuit, the auxiliary power module arranged for selectively outputting a first electrical power to the conversion control circuit;an electricity supply module, coupled to the conversion control circuit, the electricity supply module arranged for providing a second electrical power; anda power supply control circuit, coupled to the auxiliary power module and the electricity supply module, the power supply control circuit arranged for referring to at least the second electrical power to determine whether to provide the first electrical power or the second electrical power as ...

PV INVERTER WITH MICRO/NANO-GRID INTEGRATION CAPABILITY

Systems, methods, and devices relating to inverters. A control system for use with photovoltaic panel coupled inverters controls the function and operation of the inverter based on the voltage at the point of common coupling. The inverter is operated in either current control mode or in voltage control mode based on whether or not the inverter is coupled to a grid or whether other energy sources are available to control the voltage at the point of common coupling. 1. A system for controlling a DC/DC converter and a DC/AC inverter , an output of said converter being input to said inverter , said converter receiving an input from a renewable energy source and an output of said inverter being sent to a power grid when a connection to said power grid at a point of common coupling is active , system comprising:a grid observer block for receiving an output voltage and an output current of said inverter;a nonlinear hybrid controller receiving an output of said grid observer;a converter controller receiving said output of said grid observer, said converter controller also receiving an input voltage and an input current to said converter;a phase shift modulator block receiving an output of said converter controller, an output of said phase shift modulator block being received by said converter;a pulse width modulator block receiving an output of said nonlinear hybrid controller, an output of said pulse width modulator block being received by said inverter;whereinsaid grid observer block determines a common coupling voltage at said point of common coupling based on said output voltage and said output current and, based on said voltage, determines an operating mode of said inverter.2. A system according to claim 1 , wherein said operating mode of said inverter is selected from either a voltage mode or a current mode.3. A system according to claim 2 , wherein claim 2 , if the inverter is operating in voltage mode claim 2 , a Maximum Power Point Tracking (MPPT) module in said ...

WIND TURBINE GENERATORS WITH POWER BACKUP SYSTEM

An array of wind turbine generators comprises a plurality of groups of generators, each group being connected to a mains electricity grid sub-station by means of a respective high-voltage cable. 1. An array of wind turbine generators arranged in first and second groups , the generators within each group being connected to an electricity sub-station using respective first and second mutually isolated high-voltage cables , further comprising a first low-voltage cable connected between a first generator in the first group and a second generator in the second group , the arrangement being such that , in the event of a fault in the first high-voltage cable causing the first generator to be disconnected from the sub-station , auxiliary power can be supplied via the first low-voltage cable from the second generator to the first generator.2. An array of wind turbine generators as claimed in claim 1 , wherein the first low-voltage cable is connected between the second generator and a plurality of generators in the first group.3. An array of wind turbine generators as claimed in claim 2 , and arranged such that claim 2 , in the event of a fault in the first high-voltage cable auxiliary power is supplied via the first low-voltage cable from the second generator sequentially to each of the plurality of generators in the first group.4. An array of wind turbine generators as claimed in claim 2 , and arranged such that claim 2 , in the event of a fault in the first high-voltage cable auxiliary power is supplied via the first low-voltage cable from the second generator simultaneously to each of the plurality of generators in the first group.5. An array of wind turbine generators as claimed in claim 4 , and arranged not to supply power to the sub-station when supplying auxiliary power simultaneously to the plurality of generators in the first group.6. An array of wind turbine generators as claimed in claim 2 , wherein a second low-voltage cable is connected between a generator in ...

SYSTEM AND METHOD OF DETERMINING FORECAST ERROR FOR RENEWABLE ENERGY FLUCTUATIONS

A system for determining (a) forecast error and/or (b) scaling error for wind power generation is provided, the system utilizing generated and forecast time series for power generation derived from wind and analyzing temporal correlations in the wind fluctuations to quantify: (a) the forecast error defined by deviations between the high frequency components of the forecast and generated time series, and (b) a scaling error defined by a degree that temporal correlations fail to be predicted for an accurate predictor of wind fluctuations. Wind fluctuations may exhibit multi-fractal behavior at the turbine level and/or may be rectified to a fractal structure at the grid level. A memory kernel may be used to reduce the forecast and scaling errors. 1. A computer-readable storage medium storing a program to manage energy production in an energy grid based on a physical quantity , the program causing a computer to execute at least following processes ,a first process including:a (1-1)-th step that fixes n to an integer equal to 1 or greater;a (1-2)-th step that makes a calculation shown in a formula (1) regarding the physical quantity:{'sub': G', 'F', 'F', 'G, 'sup': 'n', 'P(t) represented as a function of a time t and a predicted value of the physical quantity: P(t+τ) at a time t+τ when a fixed time τ passes from the time t, (|P(t+τ)−P(t)|). . . (1);'}a (1-3)-th step that calculates a first average value as an average value of the formula (1) when the time t is varied for a fixed period;a (1-4)-th step that calculates a first average value when the T is varied;a (1-5)-th step that performs the (1-1)-th step to the (1-4)-th step at least once for the integer that is different from the n in the (1-1)-th step; anda (1-6)-th step that calculates a time scaling error in accordance with a numeric of the n from the first average value calculated in the (1-4)-th step and the first average value calculated in the (1-5)-the step;a second process including steps below:a (2-1)-th ...

Energy Storage System for Renewable Energy Source

An energy storage system for use in a renewable energy power system is provided. More particularly, an energy storage system can be coupled to the DC bus of a power converter in a renewable energy power system. A switching power supply can be coupled between the energy storage device and the DC bus of the power converter. The switching power supply can include a bi-directional resonant DC to DC converter. The bi-directional resonant converter can include a plurality of switching elements, a resonant circuit coupled to the at least one switching element, and a filtering circuit coupled to the resonant circuit. The bi-directional resonant converter can be configured to accommodate power flow in at least two directions. 1. A renewable energy power system , comprising:a power converter having a DC bus;an energy storage system coupled to the DC bus of the power converter, the energy storage system comprising an energy storage device and a switching power supply coupled between the energy storage device and the DC bus of the power converter; anda control system configured to operate the energy storage system in a first mode where power flows in a first direction from the DC bus to the energy storage device and in a second mode where power flows in a second direction from the energy storage device to the DC bus;wherein the switching power supply comprises a bi-directional resonant DC to DC power converter, the bi-directional resonant DC to DC power converter configured to accommodate bi-directional power flow between the energy storage device and the DC bus.2. The renewable energy system of claim 1 , wherein the bi-directional resonant DC to DC power converter comprises a plurality of switching elements claim 1 , a resonant circuit coupled to the plurality of switching elements claim 1 , and a filtering circuit coupled to the at least one resonant circuit.3. The renewable energy system of claim 2 , wherein the plurality of switching elements comprise a first switching ...

Method for supplying electrical power

A method for supplying electrical power to an electrical supply grid from at least one wind power installation is provided. The supply of electrical power is controlled such that changes in the supplied electrical power are limited based on at least one limit gradient. The at least one limit gradient specifies a magnitude of a maximum change of the supplied electrical power. The least one limit gradient is set based on a property and/or an instantaneous state of the supply grid.

CONTROL FOR ENERGY RESOURCES IN A MICROGRID

A method employing an intuitive physical slider, or graphical computer display of a slider, to generate a single input value for use in generating operating set points (typically comprising dispatch and droop settings) for each of a multiplicity of energy resources in a microgrid to achieve a predetermined operational goal, such as maximizing resiliency or efficiency, or minimizing emissions. The single input value may be selected to maximize the resiliency of the microgrid, using a minimized droop when the microgrid encounters either a decrease in energy resources or an abrupt increase in end-user loads. Alternatively, the single input value may maximize the efficiency of the microgrid. Other operational goals may also be achieved with different settings of the single input value. 1. A method of controlling operating set points of energy resources in a microgrid , comprising:receiving a data set associating a plurality of energy resources with candidate operational points for the microgrid;supplying power to end-use loads using the plurality of energy resources;receiving a single input value to select an operational point of the microgrid;correlating the single input value with the data set to calculate a plurality of control set points corresponding to the selected operational point of the microgrid; andmodifying the configurations of the plurality of energy resources using the calculated control set points.2. The method of claim 1 , wherein the receiving a data set includes accessing a database of simulations of a plurality of energy resources having different control set points.3. The method of claim 1 , further including simulating a plurality of energy resources having different control set points to generate the data set.4. The method of claim 3 , wherein the simulating of the plurality of energy resources includes simulating the microgrid with different transient conditions.5. The method of claim 1 , wherein the end-use loads are within the microgrid.6. The ...

METHOD FOR FEEDING IN ELECTRICAL ENERGY BY MEANS OF A WIND TURBINE

A method for feeding electric energy into an electric power supply network by means of a wind turbine, wherein the wind turbine generates electric power from wind having a variable wind speed by means of an aerodynamic rotor and a generator and feeds it at least partially into the electric power supply network and/or uses it at least partially for supplying electric devices of the wind turbine, wherein the generated electric real power is set as function of an ambient temperature and/or wherein the rotor has a variable rotational speed and the rotational speed is set as a function of the ambient temperature. 1. A method comprising:feeding electric energy into an electric power supply network by a wind turbine, wherein the feeding includes:using the wind turbine to generate electric power from wind having a variable wind speed by an aerodynamic rotor and a generator, wherein the wind turbine provides at least some of the generated electric power to at least one of the electric power supply network and electric devices of the wind turbine, wherein at least one of:the generated electric power is set as a function of an ambient temperature; andthe rotor has a variable rotational speed and the rotational speed is set as a function of the ambient temperature.2. The method according to claim 1 , wherein after a first temperature threshold has been reached claim 1 , at least one of the generated electric power and the rotational speed is reduced claim 1 , wherein the generated electric power and the rotation speed is reduced linearly as the temperature continues to reduce.3. The method according to claim 3 , wherein the wind turbine is shut down when a second temperature threshold is reached that is less than the first temperature threshold.4. The method according to claim 1 , wherein at least a portion of the generated power is used for:heating rotor blades of the rotor,heating the generator,heating at least one droplet separator for drying air,heating at least one ...

BASIC GRID SUPERVISION OF A WIND POWER PLANT

The present invention relates to a method for supervision of an electrical measurement in a wind power plant, with a plurality of wind turbine generators, the method comprises, a) measuring a measurement of an electrical parameter in the wind power plant, b) determining a difference between the measurement and a reference value, c) in case the difference is greater than a threshold value, incrementing an event counter, d) in case the event counter is incremented, raising a first warning flag. The invention also relates to a power plant controller arranged to supervise a wind power plant according to the method; the wind power plant comprises a plurality of wind turbine generators. 1. A method for supervision of an electrical parameter in a wind power plant , the wind power plant comprising a plurality of wind turbine generators , the method comprising:a) measuring the electrical parameter in the wind power plant,b) determining a difference between the measurement parameter and a reference value,c) in case the difference is greater than a threshold value, incrementing an event counter, andd) upon incrementing the event counter, raising a first warning flag.2. The method according to claim 1 , wherein the method further comprises:upon incrementing the event counter, starting an event timer with a predetermined duration of time,repeating the steps a), b), c) and d) once every predefined sample period of time,in case the event counter is greater than a predetermined limit value, raising a second warning flag, andresetting the event counter when the event timer expirers.3. The method according to claim 1 , wherein the method further comprises:e) determining a sign of the difference,f) in case the difference is greater than a threshold value and the sign of a previous difference has toggled from negative to positive or from positive to negative, incrementing a flicker counter,g) upon incrementing the flicker counter, starting a flicker window with a second predetermined ...

Portable hybrid street light

The present invention relates to a portable or stationary light; and in particular, to a portable street light powered by renewable energy sources such as wind and solar energy.

A wind power plant with improved rise time

The present invention relates to a method for controlling a wind power plant connected to an electrical grid, the wind power plant comprising at least one wind turbine generator and a power plant controller, the power plant controller comprising a signal controller for controlling an electrical parameter with a gain (Kgs), the method comprising, measuring at least one electrical parameter in the electrical grid, determining an internal signal value at least partially based on the at least one electrical parameter, comparing the internal signal value with a saturation value, and if the internal signal value exceed the saturation value, increasing the gain (Kgs) of the signal controller to a first gain value, in order to decrease a rise time for a slope for the electrical-parameter in the electrical grid. The invention also relates to a power plant controller arranged to decrease a rise time for a voltage slope for a voltage parameter in the electrical grid.

RECONFIGURATION OF THE REACTIVE POWER LOOP OF A WIND POWER PLANT

The present invention relates a method of controlling a wind power plant connected to an electrical grid, the wind power plant comprises a power plant controller (), a plurality of wind turbine generators () and a STATCOM (), with a STATCOM controller, comprises: controlling the plurality of wind turbine generators in a first control mode, with the power plant controller controlling a reactive power production from each of the plurality of wind turbine generators according to a closed loop control scheme, and controlling in a first control mode with a closed loop control scheme a reactive power production from the STATCOM according to a first setpoint dispatched from the power plant controller, and controlling the reactive power production from the STATCOM in a second control mode from the STATCOM controller according to an electrical measurement in the grid, and controlling the plurality of wind turbine generators in a second control mode, with the power plant controller controlling a reactive power production from the plurality of wind turbine generators, according to a feedforward control or a close loop control, based on a second setpoint from the STATCOM controller, and switching between the first control mode and the second control mode when receiving at least one trigger signal. The invention also relates to a wind power plant according to the method. 1. A method for controlling a wind power plant connected to an electrical grid , the wind power plant comprising a power plant controller , a plurality of wind turbine generators and a STATCOM , the STATCOM having a STATCOM controller , the method comprising:controlling the plurality of wind turbine generators in a first control mode, with the power plant controller controlling a reactive power production of each of the plurality of wind turbine generators according to a closed loop control scheme,controlling in the first control mode with a closed loop control scheme a reactive power production of the STATCOM ...

CONTROL OF REACTIVE POWER IN A WIND POWER PLANT

The invention relates to a method for controlling injection and absorption of reactive power in a wind power plant (WPP). In addition to wind turbine generators (WTG), the wind power plant comprises reactive power regulating devices, such as MSU and STATCOM devices. The reactive power regulating devices are controlled by wind power plant controller so that the combined amount of reactive power produced by the wind turbine generators and the reactive power regulating devices satisfies a desired amount of reactive power. In case of communication fault between the power plant controller and one of the reactive power regulating devices, the power plant controller is reconfigured so as to compensate the capability of the reactive power regulating device to inject or absorb the amount of reactive power. 1. A power plant controller for generating a setpoint to a wind turbine generator connected to an electrical grid , wherein the setpoint relates to a desired amount of reactive power to be produced by the wind turbine generator , wherein the power plant controller comprises:a device controller configured to control operation of a reactive power regulating device, wherein the reactive power regulating device is capable of injecting or absorbing an amount of reactive power to/from the electrical grid,a reference control system configured to determine the setpoint on basis of an electrical reference input and a measured electrical value,a communication fault detector configured to detect a communication fault between the power plant controller and the reactive power regulating device, whereinthe power plant controller is arranged to be reconfigured in response to a detection of the communication fault in order to compensate the capability of the reactive power regulating device to inject or absorb the amount of reactive power to/from the electrical grid.2. A power plant controller according to claim 1 , wherein the power plant controller is arranged to perform the ...

RESONANCE SUPPRESSION DEVICE

The present invention whose object is to reduce compensation current at the time when suppressing harmonic distortion caused by harmonic voltage, to reduce capacitance of an inverter, a resonance suppression device configured to suppress resonance which occurs when a power facility such as a wind power generator is connected to a power system includes: an inverter configured to supply alternating current to the power system, the inverter being in parallel with the power facility; a current command value generation unit in which voltage at a connection point between the power facility and the power system is inputted thereto and a current command value is obtained by multiplying, by a transfer function, a harmonic component contained in the voltage at the connection point; and a current control unit configured to control the alternating current outputted from the inverter based on the current command value. 1. A resonance suppression device configured to supply compensation current to a power system from a power conversion device connected to the power system , to suppress resonance which occurs with a power facility being connected to the power system , the resonance suppression device comprising:a current command value generation unit whereto voltage of the power system is inputted, the current command value generation unit being configured to multiply, by a transfer function, a frequency component obtained by eliminating a fundamental wave component from frequency components contained in the inputted voltage, to generate a current command value with respect to the power conversion device,the current command value generation unit being configured to output the current command value to the power conversion device, to supply the compensation current to the power system.2. The resonance suppression device according to claim 1 , wherein 'a first filter configured to extract a frequency component obtained by eliminating a fundamental wave component from frequency ...

Local demand side power management for electric utility networks

A demand side electric power supply management system is disclosed. The system comprises an islanded power system having a point of coupling to a supply grid. The islanded power system supplies a plurality of electric loads, each of which is associated with a load controller to control the maximum power demanded by that load. A measuring means associated with the point of coupling measures the total power transfer between the grid and the islanded system, and a system controller monitors the measured power transfer relative to a set point and provides a control signal to a plurality of load controllers. Each load controller receives substantially the same control signal and determines the maximum power which the or each load associated with the load controller is allowed to draw from the islanded power system based on information contained in the control signal.

Method and Apparatus for Actively Managing Electric Power Supply for an Electric Power Grid

Systems and methods are disclosed for managing power supplied over an electric power grid from at least one power supply source. A coordinator manages communications between at least one server and the at least one power supply source, wherein the server is operable to initiate power commands, wherein the communications comprise an actual amount of power supply available for the electric power grid from the at least one power supply source, and wherein the at least one power supply source is operable to provide power supply to the electric power grid based on the power commands. 1. A system for managing power supplied to an electric power grid from at least one power supply source , comprising:a coordinator constructed and configured in networked communication with a server;wherein the server is operable to initiate power commands;wherein the coordinator is operable to dispatch one or more energy resources;wherein the coordinator is operable to coordinate and manage IP-based communications between the server and the at least one power supply source;wherein the at least one power supply source comprises at least one power storage device, wherein the at least one power storage device includes an IP address;wherein the coordinator is further operable to receive messages from the at least one power supply source for registration;wherein the at least one power supply source is automatically registered with the coordinator after the coordinator receives the message;wherein the IP-based communications comprise an actual amount of power supply available for the electric power grid from the at least one power supply source based on revenue grade metrology; andwherein the at least one power supply source is operable to provide power supply to the electric power grid based on the power commands.2. The system of claim 1 , wherein the at least one power storage device is selected from the group consisting of fuel cells claim 1 , battery devices claim 1 , energy potential devices ...

Power System Stabilizer for Voltage Source Converters

Devices and methods for mechanism-based feedback controller employed in a wind powered power system are provided. A controller can include a vector control-based voltage source converter with feedback control circuitry. The feedback control circuitry is configured to modulate either a power order or a dc-link voltage order to control coupling between voltage and power. The controller can be connected to a wind-based turbine generator of a wind farm and regulate power deployed to a power grid. 1. A controller system for a wind-based power system , the controller comprising:a vector control-based voltage source converter configured to have feedback control circuitry;wherein the feedback control circuitry is configured to modulate either a power order or a dc-link voltage order,wherein a first input signal into the controller system is an alternating current (AC) voltage, andwherein the feedback control circuitry is configured such that a change in magnitude of the AC voltage is used as an input into the feedback control circuitry to modulate the power order or the dc-link voltage order.2. The controller system of claim 1 , wherein the feedback control circuity is configured to reduce coupling between an active power and a voltage at a point of common coupling.3. The controller system of claim 1 , wherein a second input signal into the controller system is a d-axis converter current.4. The controller system of claim 1 , wherein the first input signal into the controller system is a voltage at a point of common coupling.5. The controller system of claim 3 , wherein the controller system is configured to modulate either the power order or the dc-link voltage order by using the d-axis converter current.6. The controller system of claim 4 , wherein the controller is configured to modulate either a power order or a dc-link voltage order by using the voltage at a point of common coupling.7. The controller system of claim 1 , further comprising:an integrator; anda high pass ...

METHOD FOR OPERATING A WIND FARM

Provided is a method for operating a wind farm having a plurality of wind energy installations or a wind energy installation for feeding electrical power into an electrical supply grid, comprising the steps of: feeding electrical power into the electrical supply grid, identifying a forecast power, which describes a power that can be fed in in a predetermined, future forecast period by the wind farm or the wind power installation, determining a reduction forecast power, which denotes, for the forecast period, a power by which the power fed in in the forecast period can be reduced, and supplying the reduction forecast power as negative control power, wherein the reduction forecast power is determined depending on the forecast power and depending on a controllable consumption power, wherein the controllable consumption power describes a power that can be consumed on demand in the forecast period by controllable consumers present in the wind farm or in the wind power installation. 1. A method for operating a wind farm having one or more wind power installations for feeding electrical power into an electrical supply grid , the method comprising:feeding electrical power into the electrical supply grid;identifying a forecast power describing an infed power that can be fed in in a predetermined, future forecast period by the wind farm;determining a reduction forecast power denoting, for the forecast period, a power by which power fed in in the forecast period can be reduced, andsupplying the reduction forecast power as negative control power, wherein the reduction forecast power is determined depending on the forecast power and depending on a controllable consumption power, wherein the controllable consumption power describes a power that can be consumed on demand in the forecast period by a plurality of controllable consumers present in the wind farm.2. The method as claimed in claim 1 , wherein the infed power is reduced by a value up to a level of the reduction forecast ...

METHOD FOR AUTOMATICALLY ASSOCIATING A MODULE TO A CORRESPONDING INVERTER, AND RELATED MODULE AND POWER GENERATION SYSTEM

A method for automatically associating a module to a corresponding inverter of a plurality of inverters which are adapted to generate measurements related to their operation, comprising: installing the module for generating measurements related to the operation of a corresponding inverter of the plurality of inverters; comparing, by processing means, the measurements generated by the module to the measurements generated by the plurality of inverters; and basing on the comparison, determining by the processing means which of the plurality of inverters is the corresponding inverter of the module. 1. A method for automatically associating a module to a corresponding inverter of a plurality of inverters which are adapted to generate measurements related to their operation , the method comprises:a) installing the module for generating measurements related to the operation of a corresponding inverter of said plurality of inverters;b) comparing, by processing means, the measurements generated by the module to the measurements generated by the plurality of inverters; andc) basing on the comparison, determining by the processing means which of the plurality of inverters is said corresponding inverter of the module.2. The method according to claim 1 , further comprising providing claim 1 , by the processing means claim 1 , information about the association between the module and the determined corresponding inverter to a control system.3. The method according to claim 1 , wherein it comprises tagging the measurements of the module with the address of the determined corresponding inverter.4. The method according to claim 1 , wherein it comprises automatically assigning an unused address to the module after the execution of said step c).5. The method according to claim 1 , wherein said step b) comprises at least one of the following operations:calculating a difference between the measurements generated by the module and the measurements generated by the plurality of inverters; ...

USE OF DISTRIBUTED GENERATOR (DG) INVERTERS AS STATCOMS FOR DECREASING LINE LOSSES

The invention provides systems, methods, and devices relating to the provision of system-wide coordinated control voltage regulation support in power transmission and distribution networks using multiple inverter based power generation facilities, which are coupled to the power transmission and distribution networks for minimizing transmission and distribution line losses. The invention uses a novel control method of inverter based Distributed Generators as Static Synchronous Compensator (STATCOM) in a way that provides a dynamic voltage regulation/control with the inverter capacity remaining after real power generation, thereby decreasing system line losses. 1. A method for reducing line losses in a power transmission and distribution network , the method comprising:a) at a specific inverter based power generation facility, receiving an indication that voltage control support is required for line loss minimization;b) receiving operating parameters and constraints of said power transmission and distribution network from an energy control center of said power transmission and distribution network;c) determining a specific voltage for a specific location on said power transmission and distribution network, said specific location corresponding to said specific inverter based power generation facility, said specific voltage being determined based on an optimal load flow determination performed at said specific inverter based power generation facility and said optimal load flow determination being based on said operating parameters and constraints received in step b), said specific voltage being a voltage that minimizes line losses on said network;d) regulating a voltage at a point of common coupling for said specific inverter based power generation facility, said voltage being regulated towards said specific voltage through injecting or absorbing controlled reactive power with said network, said controlled reactive power being based on an inverter capacity for said ...

Power conversion system and method

An exemplary power conversion system includes a first power conversion module, a second power conversion module, and a controller. The first power conversion module includes a first source side converter, a first load side converter, and a first DC link coupled between the first source side converter and the second load side converter. The second power conversion module includes a second source side converter, a second load side converter, and a second DC link coupled between the second source side converter and the second load side converter. The controller is configured to generate a number of switching signals according to a circuit structure of the power source module or a circuit structure of the load module. The switching signals are provided to the first power conversion module and the second power conversion module to balance a first DC link voltage and a second DC link voltage.

Electricity distribution system and electricity distribution method

An electricity distribution system includes an electricity supply control unit that receives information on power consumption, estimates the current and the future power consumption, and controls the supply of electricity to the electric device; an information display unit that displays information on a power use situation of an electric device electrically connected with the electricity supply control unit; and a battery server that accumulates power, in which the electricity supply control unit communicates the information on the power consumption with a new electric device when the new electric device is electrically connected, and when the amount of available power is exceeded by supplying electricity to the electric device, does not supply electricity to the electric device, makes the information display unit display that the amount of available power is exceeded by supplying electricity to the information display unit, and determines whether to use the power accumulated in the battery server.

SYSTEM AND METHOD FOR DYNAMICALLY DETERMINING MAXIMUM ELECTRIC CURRENT CARRYING CAPACITIES

This system () for dynamically determining maximum electric current carrying capacities comprises: means () for storing a model () of a network portion (), a thermal equilibrium relationship (), operating limit temperatures and conduction parameters; and a receiver () for wind speed values measured by wind measurement stations (). 1. A system for dynamically determining maximum electric current carrying capacities relative to a portion of a high-voltage electric current transmission network , comprising:means for storing a model of the network portion, this model comprising singular points and at least one high-voltage electric current-carrying line between these singular points, a predetermined thermal equilibrium relationship, an operating limit temperature of each current-carrying line and conduction parameters of each current-carrying line,a computer, having access to the storing means, programmed to calculate at least one maximum capacity value at each singular point of the model of the network portion on the basis of the predetermined thermal equilibrium relationship, of each operating limit temperature, of each conduction parameter and of weather parameters, select at least one wind measurement station in the set of wind measurement stations,', 'apply a model of wind propagation from said at least one selected station towards the singular points of the model of the network portion, in order to estimate a wind speed value at each singular point on the basis of the wind speed values received, and', 'calculate said at least one maximum capacity at each singular point taking into account said wind speed value estimated at each singular point in the predetermined thermal equilibrium relationship., 'characterized in that it further comprises means for receiving, by the computer, wind speed values measured by a set of wind measurement stations deployed around the network portion, and in that the computer is programmed to2. The system for dynamically determining ...

Masterless distributed power transfer control

A method of power transfer control among a plurality of power sources coupled through a distribution system. The method comprises determining, at each power source of the plurality of power sources, an assignment of priorities for each of the plurality of power sources. The method also comprises obtaining, at each power source, information indicating an availability of each of the plurality of power sources and determining a set of available power sources, and identifying, at each power source, a preferred power source and a standby power source from the plurality of power sources. The method further comprises determining to change the preferred power source from a first power source to a second power source in response to detecting a condition, and conducting the power transfer.

POWER REGULATION SYSTEM FOR ENERGY HARVESTERS

According to some aspects, a power regulation system for energy harvesters that lacks a battery is provided. In some embodiments, the power regulation system may receive power from multiple energy harvesters that generate energy from different sources, such as wind currents and ambient light. In these embodiments, the power regulation system may selectively provide power from one or more of the energy harvesters to a load as environmental conditions change and power itself with energy from the energy harvesters. Thereby, the power regulation system may start and operate without a battery and provide power to the load over a wider range of environmental conditions. 1. A wireless node comprising:a sensor configured to generate information indicative of at least one parameter;a wireless transmitter coupled to the sensor and configured to wirelessly transmit the information indicative of the at least one parameter;a plurality of energy harvesters including a first energy harvester;a first regulator coupled to the first energy harvester and configured to receive power from the first energy harvester; anda second regulator coupled to the plurality of energy harvesters and the first regulator, the second regulator being configured to selectively receive power from the first regulator and at least one of the plurality of energy harvesters and provide power to the wireless transmitter.2. The wireless node of claim 1 , wherein the first energy harvester is configured to harvest energy from a first source selected from the group consisting of: air currents claim 1 , light claim 1 , and heat and wherein the plurality of energy harvesters further includes a second energy harvester configured to harvest energy from a second source different than the first source.3. The wireless node of claim 1 , wherein the wireless node is a batteryless wireless node.4. The wireless node of claim 1 , wherein the second regulator is configured to increase a voltage from the at least one energy ...

OPTIMAL CONTROL TECHNOLOGY FOR DISTRIBUTED ENERGY RESOURCES

Devcies and methods of allocating distributed energy resources (DERs) to loads connected to a microgrid based on the cost of the DERs are provided. The devices and methods may determine one or more microgrid measurements. The devices and methods may determine one or more real-time electricity prices associated with utility generation sources. The devices and methods may determine one or more forecasts. The devices and methods may determine a cost associated with one or more renewable energy sources within the microgrid. The devices and methods may determine an allocation of the renewable sources to one or more loads in the microgrid. 1. A method comprising:determining, by one or more computer processors coupled to at least one memory, one or more microgrid measurements;determining, by the one or more computer processors, one or more real-time electricity prices associated with utility generation sources;determining, by the one or more computer processors, one or more forecasts;determining, by the one or more computer processors, a cost associated with one or more renewable energy sources within the microgrid; anddetermining, by the one or more computer processors, an allocation of the renewable sources to one or more loads in the microgrid.2. The method of claim 1 , wherein the microgrid measurements include real power measurements and reactive power measurements.3. The method of claim 2 , wherein the microgrid measurements are measurements of the one or more renewable energy sources.4. The method of claim 1 , wherein the utility generation sources comprise coal fired plants claim 1 , natural gas plants claim 1 , wind farms claim 1 , solar photovoltaic (PV) plants claim 1 , hydroelectric plants claim 1 , or nuclear plants.5. The method of claim 4 , wherein the one or more forecasts comprise real power forecasts of the solar PV plants forecasts and load forecasts of power consumed by the one or more loads.6. The method of claim 1 , wherein the allocation of the ...

METHOD FOR FEEDING ELECTRICAL POWER INTO AN ELECTRICAL SUPPLY NETWORK

A method for feeding electrical power at a network connection point into an electrical supply network by at least one wind power installation includes generating electrical power from wind, feeding the generated electrical power or a portion thereof into the electrical supply network, offering an instantaneous reserve for additionally feeding or reducing the feeding into the electrical supply network in order to support the electrical supply network, and additionally feeding electrical power or reducing the fed-in power up to the offered instantaneous reserve, depending on a network property and/or an external requirement. The method is operative to support the electrical supply network. A reserve level of the offered instantaneous reserve is settable as an offer level. 1. A method for feeding electrical power at a network connection point into an electrical supply network by at least one wind power installation , the method comprising:generating electrical power from wind,feeding the generated electrical power or a portion of the generated electrical power into the electrical supply network,providing an instantaneous reserve for at least one of: additionally feeding or reducing the feeding of the generated electrical power or the portion of the generated electrical power into the electrical supply network, providing the instantaneous reserve being operative to support the electrical supply network, andadditionally feeding electrical power or reducing the fed-in generated electrical power or the portion of the generated electrical power up to the provided instantaneous reserve and based on at least one of: a network property or an external requirement, wherein a reserve level ofthe instantaneous reserve is settable.2. The method for feeding in as claimed in claim 1 , further comprising:setting the reserve level based on a property of the network connection point.3. The method as claimed in claim 1 , comprising: a short-circuit power at the network connection point ...

Fault ride-through capability for wind turbine

A wind turbine system (20, 70) is connected to an electrical grid (42) by an inverter (38) that provides turbine terminal voltage (Vt) support to the grid during a grid low voltage fault that is concurrent with a lack of real power production from the generator (30) by providing reactive power to the grid. A processor (46) controls the inverter to preserve a minimum voltage on a local DC bus (34) by stopping the reactive power output when the DC bus voltage drops to a threshold value (59) that is above a low bus voltage trip setpoint (56). An energy storage device (48) such as a battery may be connected to the DC bus to provide power that supports a prolonged ride-through capability during the grid fault.

METHOD FOR FEEDING ELECTRICAL POWER INTO AN ELECTRICITY SUPPLY NETWORK WITH A WIND PARK AND WIND PARK WITH BLACK START

A method for feeding electrical power into an electrical supply network by means of at least one wind farm respectively connected to the supply network via a network connection point, wherein the supply network is to be operated at a network frequency, and each wind farm has a plurality of wind power installations, comprising the steps of determining whether the electrical supply network is operating, starting the at least one wind farm in a black-start mode for the purpose of producing electrical power for feeding into the supply network if the supply network is not operating, operating the at least one wind farm in black-start operation in which electrical power is fed into the supply network and the supply network is operated thereby, wherein the network frequency is specified by the feeding-in of the electrical power in the black-start mode and/or during black-start operation. 1. A method comprising:feeding electrical power into an electrical supply network by a wind farm connected to the electrical supply network by a network connection point, wherein the wind farm has a plurality of wind power installations, wherein the feeding comprises:determining whether the electrical supply network is operating;in the event the supply network is not operating, starting the wind farm in a black-start mode for a purpose of producing electrical power for feeding into the electrical supply network; andoperating the wind farm in black-start operation in which electrical power generated by the wind farm is fed into the supply network and the electrical supply network is operated thereby,wherein a network frequency of the supply network is specified by the feeding-in of the electrical power in the black-start mode, during black-start operation or both.2. The method as claimed in claim 1 , wherein in the black-start mode claim 1 , the wind farm is connected to the supply network via the respective network connection point claim 1 , wherein:the supply network is not operating ...

MANAGEMENT OF ENERGY DEMAND AND ENERGY EFFICIENCY SAVINGS FROM VOLTAGE OPTIMIZATION ON ELECTRIC POWER SYSTEMS USING AMI-BASED DATA ANALYSIS

A method, apparatus, system and computer program is provided for controlling an electric power system, including implementation of a voltage control and conservation (VCC) system used to optimally control the independent voltage and capacitor banks using a linear optimization methodology to minimize the losses in the EEDCS and the EUS. An energy validation process system (EVP) is provided which is used to document the savings of the VCC and an EPP is used to optimize improvements to the EEDCS for continuously improving the energy losses in the EEDS. The EVP system measures the improvement in the EEDS a result of operating the VCC system in the “ON” state determining the level of energy conservation achieved by the VCC system. 1. A method of controlling an electric power grid configured to supply electric power from a supply point to a plurality of consumption locations , the method comprising:receiving measurement data from at least one of a plurality of sensors, wherein each sensor is located at a respective one of a plurality of distribution locations on the electric power grid at or between the supply point and at least one of the plurality of consumption locations, and wherein each sensor is configured to sense at least one component of a supplied electric power received at the respective distribution location,searching one or more boundary conditions and determining at least one control point of at least one component adjusting device that minimizes at least one linear power loss model;adjusting a component adjusting device based on the at least one control point to adjust a component of the electric power grid.2. The method of claim 1 , wherein the at least one linear power loss model includes a power loss model from an upstream location to a downstream location.3. The method of claim 1 , wherein the at least one linear power loss model includes a power loss from an energy supply system to an energy usage system.4. The method of claim 1 , wherein the at least ...

MULTIVARIABLE MODULATOR CONTROLLER FOR POWER GENERATION FACILITY

Systems, methods, and devices relating to operating a power generation facility to contribute to the stability of the power transmission system. A controller operates on the power generation facility to modulate real power or reactive power or both in a decoupled manner to contribute to the stability of the power transmission system. Real power produced by the power generation facility can be increased or decreased between zero and the maximum real power available from the PV solar panels, as required by the power system. Reactive power from the power generation facility can be exchanged (injected or absorbed) and both increased or decreased as required by the power transmission system. For solar farms, the solar panels can be connected or disconnected, or operated at non-optimal power production to add or subtract real or reactive power to the power transmission system. 2. The method according to claim 1 , wherein implementing said specific mode of operation comprises adjusting at least one inverter of said power generation facility.3. The method according to claim 2 , further comprising adjusting said at least one inverter of said power generation facility to thereby use at least a portion of said at least one inverter's capacity to provide at least one of modulated real power claim 2 , modulated reactive power claim 2 , and a combination of said modulated real power and said modulated reactive power.4. The method according to claim 1 , wherein said at least one benefit comprises at least one of:a specific benefit related to said power grid system;another specific benefit related to a time of day wherein said day is a 24-hour period; anda specific financial benefit.5. The method according to claim 3 , wherein said specific benefit related to said power grid system comprises at least one of:damping system oscillations;increasing transient stability;regulating power system frequency;improving voltage stability and voltage regulation;increasing power transmission ...

RECONFIGURABLE POWER APPARATUS

A power apparatus () comprises one or more backplanes () and removably engageable power modules (). Each backplane () comprises a plurality of slots () and each slot () is adapted to engage with a corresponding removably engageable power module (). Each backplane () further comprises a bus () coupled between each of the slots () and at least two said power modules () removably engageable with corresponding ones of the slots (). The power modules (), which are engaged with the corresponding slots (), communicate and distribute power with one another via the bus (). 1. A power supply apparatus for supplying electrical power to at least one electrical load , the power supply apparatus comprising: a plurality of slots each adapted to engage with a corresponding removably engageable power module; and', 'a bus coupled between each of the slots; and, 'at least one backplane comprising at least one input component for receiving electrical power from an electrical power supply and providing the received electrical power to the bus;', 'at least one battery component for storing electrical power derived from the bus and providing electrical power to the bus;', 'at least one charging component for receiving electrical power from the bus and providing charging power to the bus for charging the at least one battery component; and', 'at least one output component for receiving, via the bus, electrical power from the at least one battery component and supplying electrical power to the at least one electrical load., 'a plurality of said power modules, each power module being removably engageable with one of the plurality of slots, the power modules communicating and distributing power with one another via the bus, wherein the plurality of said power modules are configured for supplying electrical power to the at least one electrical load, wherein the plurality of power modules comprise2. The power supply apparatus of claim 1 , wherein each of the power modules further comprises: ...

POWER MANAGEMENT CONCEPT IN DC DISTRIBUTED SYSTEMS

A system and method to interconnect several conventional or alternative power generators, loads, and/or energy storage elements physically separated from each other in a DC distribution system. The method includes the steps of providing a common DC bus to interconnect all of the elements in the DC distributed system using power converters. A first group of one or more of the elements (main element) is used to automatically maintain the voltage of the DC link following a set a set point to provide for the load matching. The average DC link voltage (set point) maintained by the main element is intentionally changed in order to indicate all of the other elements connected to the DC bus how they need to modify their power generation or consumption. 1. A method to interconnect several conventional or alternative power generators , loads , and/or energy storage elements physically separated from each other in a DC distribution system , which method comprises:providing a common DC bus to interconnect all the elements in the DC distributed System using power converters;using a first group of one or more of the elements (MAIN ELEMENT) to automatically maintain the voltage of the DC link following a set point to provide for said load matching;intentionally changing the average DC link voltage (set point) maintained by the MAIN ELEMENT in order to indicate all the other elements connected to the DC bus how they need to modify their power generation or consumption.2. A method according to claim 1 , wherein the DC link voltage set point for MAIN ELEMENT is intentionally changed in response to performance requirements that constitutes a SECONDARY FUNCTION to be satisfied.3. A method according to claim 2 , wherein the SECONDARY FUNCTION is based on either a set of requirements for energy or battery management claim 2 , or a set of AC grid support needs claim 2 , or a set of average power generation/consumption constrains.4. A method according to claim 3 , wherein the MAIN ELEMENT ...

HYBRID POWER GENERATION STATION

The present invention is a hybrid wind and solar power generator. The system uses a concentrated sun light and diluted sun light to increase the efficiency of the whole system. The combination of solar and wind power generators decreases the cost of common elements for generating electricity. 1. A hybrid wind and solar power generator comprising: i. a base and a stand;', 'ii. a parabolic surface having a front portion and a back portion, wherein said front portion having a plurality of mirrors to capture and concentrate sun light;', 'iii. a vertical railing system, wherein said solar dish collector rotates over said vertical railing system;', 'iv. a horizontal railing system, wherein said solar dish collector rotates over said horizontal railing system;', 'v. an optical means to receive and concentrate sun light and to reflect infrared energy to a heat receiver;', 'vi. an aiming mirror to reflect concentrate light to a high-concentrated photovoltaic (HCPV) receiver, wherein said aiming mirror has a means to adjust a mirror;', 'vii. a bearing system to rotate said aiming mirror;', 'viii. a support bracing system to pivotally connect said solar dish collector to said aiming mirror;', 'ix. a heat receiver at said back portion sized to receive said infrared energy, wherein said heat receiver heats a cold molten salt fluid and makes a hot molten salt fluid;', 'x. a control system having an adjusting means to adjust and align said parabolic surface during a day time to face to the sun as the sun moves relative to the position of said solar dish collector;, 'a. a solar dish collector comprising ofb. a wind turbine having a wind tower with a plurality of said HCPV installed on said wind tower, said wind turbine converts mechanical energy to an electricity;c. a molten salt storage system to circulate said cold molten salt and hot molten salt, andd. a steam turbine generator to use said molten salt storage system to generate electricity.2. The hybrid power generator of claim ...

Energy Control And Storage System For Controlling Power Based On A Load Shape

An energy control and storage system includes an energy monitor, a power controller, an energy storage device, and a computing unit. The energy monitor monitors power provided between an electric distribution system and a load. The power controller exchanges power with the energy monitor and receives power from a power generation system. The energy storage device stores energy received through the power controller. The computing unit receives a load shape from outside the energy control and storage system. The computing unit controls power exchanged between the energy control and storage system and the electric distribution system based on power indicated by the load shape that changes in response to varying conditions affecting the electric distribution system.

METHOD FOR STARTING AN ENERGY GENERATION NETWORK

A method for starting a farm grid of a wind farm is provided. The energy generation grid has at least one grid connection point connected to an electrical supply grid and the energy generation grid, in a normal operating mode, exchanges electrical power with the electrical supply grid via the grid connection point. The method includes selecting an establishment mode, different than the normal operating mode, if the electrical supply grid has a voltage drop or the energy generation grid is isolated from the electrical supply grid and operating the energy generation grid in the establishment mode. The establishment mode at least one voltage-influencing wind power installation for providing a wind farm grid voltage and at least one current-influencing wind power installation that synchronizes to the energy generation grid voltage. The wind power installations in total provide an electrical power at the level of an inherent need of the grid. 1. A method for starting an energy generation grid that is a farm grid of a wind farm , wherein the energy generation grid has at least one grid connection point connected to an electrical supply grid , and wherein the energy generation grid , in a normal operating mode , exchanges electrical power with the electrical supply grid via the grid connection point , the method comprising:selecting an establishment mode, different than the normal operating mode, if the electrical supply grid has a voltage drop or the energy generation grid is isolated from the electrical supply grid; and at least one voltage-influencing device provides an energy generation grid voltage, and', 'at least one current-influencing device synchronizes to the energy generation grid voltage provided via the at least one voltage-influencing device, and', 'the at least one voltage-influencing device and the at least one current-influencing device in total provide an electrical power in the energy generation grid at a level of an inherent need of the energy ...

METHOD AND APPARATUS FOR MONITORING THE CONDITION OF SUBSYSTEMS WITHIN A RENEWABLE GENERATION PLANT OR MICROGRID

The invention relates to a method and apparatus for monitoring the condition of subsystems within a renewable generation plant or microgrid which are using Supervisory Control and Data Acquisition (SCADA) systems for allowing plant operators to monitor and interact with a plant via human machine interfaces. 1. A method for monitoring the condition of subsystems within a renewable generation plant or microgrid , comprising the steps:acquiring historical data which has previously been measured by one or more field devices connected to a number of input output devices used as part of a Supervisory Control and Data Acquisition (SCADA) system of the plant or microgrid,removing unwanted data from the acquired historical data to obtain a cleaned historical SCADA,using the cleaned historical SCADA data to identify input-output data relations for each subsystem of the plant or microgrid, where an input-output data relation for a given subsystem is a list of all signals contained within the cleaned historical SCADA data which is considered as an input to the subsystem and a list of all signals contained within the cleaned historical SCADA data which is considered as an output to the same subsystem,selecting the combination of input-output data relations within the cleaned historical SCADA data which ensure that the availability of cleaned historical SCADA data for each input-output data relation exceeds a given threshold,training separate data-driven models for each subsystem of the plant or microgrid using the cleaned historical SCADA data, wherein each trained data-driven model is optimized to be able to estimate the outputs of the subsystem from the inputs to the subsystem, where the inputs and outputs to the subsystem are described by the input-output data relations,establish alarm thresholds for each trained data-driven model,acquiring new data from the one or more field devices connected to a number of input output devices used as part of a Supervisory Control and Data ...

Photovoltaic Transfer Switch with Non-Essential Load Cutoff

In an a power management system for managing a plurality of essential loads and a plurality of nonessential loads that can be fed electric power from an alternate power source and from a grid power source, a power distribution network transmits power from the alternate power source and the grid power source to the essential loads and to the nonessential loads. A grid power sensor senses a grid power failure. A wireless transmitter is coupled to the grid power sensor and transmits a decouple signal when the grid power sensor detects a grid power failure. A plurality couplers selectively couple the nonessential loads to the power distribution network. Each of the plurality of couplers includes a wireless receiver and a switch that responsive to the wireless receiver. The couplers also decouple at least one of the nonessential loads from the power distribution network when the decouple signal is received. 1. A power management system for managing a plurality of essential loads and a plurality of nonessential loads that can be fed electric power from an alternate power source and from a grid power source , comprising:(a) a power distribution network for transmitting power from the alternate power source and the grid power source to the essential loads and to the nonessential loads;(b) a grid power sensor that senses a grid power failure;(c) a wireless transmitter that is coupled to the grid power sensor that transmits a decouple signal when the grid power sensor detects a grid power failure; and(d) a plurality couplers that selectively couple the nonessential loads to the power distribution network, each of the plurality of couplers including a wireless receiver and a switch that responsive to the wireless receiver and that decouples one of the nonessential loads from the power distribution network when the decouple signal is received.2. The power management system of claim 1 , wherein the power distribution network can receive power from an inverter that receives power ...

VOLTAGE REACTIVE POWER CONTROL DEVICE AND VOLTAGE REACTIVE POWER CONTROL PROGRAM

A voltage reactive power control device includes a bus voltage fluctuation extracting unit that extracts a bus voltage fluctuation from a voltage of a secondary-side bus, an RE component extracting unit that extracts a fluctuation component due to renewable energy power generation from the bus voltage fluctuation, a creating unit that creates a reactive power command value for suppressing the fluctuation component based on the bus voltage fluctuation component due to the renewable energy power generation extracted by the RE component extracting unit, and a control unit that executes the reactive power control on a battery system based on the reactive power command value. The RE component extracting unit extracts the fluctuation component due to the renewable energy power generation by eliminating the fluctuation components other than the fluctuation component due to the renewable energy power generation from the bus voltage fluctuation. 1. A voltage reactive power control device that suppresses a fluctuation of a bus voltage of a power distribution transformer station to which a power distribution system including a renewable energy power generation , and a battery system are connected , the voltage reactive power control device comprising:a first extracting unit that extracts a bus voltage fluctuation from the bus voltage;a second extracting unit that extracts a fluctuation component due to the renewable energy power generation from the bus voltage fluctuation;a creating unit that creates a reactive power command value for suppressing the fluctuation based on the bus voltage fluctuation component due to the renewable energy power generation extracted by the second extracting unit; anda control unit that executes a reactive power control on the battery system based on the reactive power command value,wherein the second extracting unit extracts the fluctuation component due to the renewable energy power generation by eliminating the fluctuation components other than ...

METHOD FOR FEEDING ELECTRICAL POWER INTO AN ELECTRICAL SUPPLY NETWORK

A method for supplying electric power to an electrical supply grid that has a grid rated voltage and is operated at a grid voltage, wherein the supplied electric power has a reactive power component that is prescribed by a phase angle describing an angle between a current and a voltage of the supplied electric power, wherein the phase angle is set by means of phase angle control that has a delay function characterized by at least one time constant. 1. A method comprising:supplying electric power to an electrical supply grid that has a grid rated voltage and is operated at a grid voltage, wherein the supplied electric power has a reactive power component that is prescribed by a phase angle describing an angle between a current and a voltage of the supplied electric power, wherein the phase angle is set by phase angle control that has a delay function by at least one time constant.2. The method of claim 1 , wherein the phase angle control alters the phase angle based on at least one grid voltage recorded in the electrical supply grid.3. The method of claim 1 , wherein the phase angle is altered such that the grid voltage remains substantially unaltered at at least one prescribed point in the electrical supply grid.4. The method of claim 1 , wherein the phase angle is altered based on a setpoint voltage claim 1 , and the setpoint voltage is prescribed in a range from 105% to 110% of the grid rated voltage.5. The method of claim 1 , wherein the at least one time constant is varied to alter the delay function based on at least one of: a grid state or a grid sensitivity.6. The method of claim 1 , wherein the delay function or the at least one time constant is altered by an adaptation algorithm to alter the delay claim 1 , wherein the adaptation algorithm is performed based on at least one of: a grid state or a grid sensitivity.7. The method of claim 1 , wherein:the phase angle control has a proportional response characteristic, so that the phase angle control prescribes a ...

MULTI-FARM WIND POWER GENERATION SYSTEM

A multi-farm wind power dispatch management system is provided which includes wind turbine dispatch controllers for controlling wind power dispatch of respective wind farm components and wind farm dispatch management systems for receiving respective wind farm component operating parameters and generating respective farm-level operating parameters. The system also includes group dispatch management systems for receiving the farm-level operating parameters and generating respective group level operating parameters. The system also includes a master dispatch management system for receiving the group-level operating parameters; computing a real time output power generated by the wind farm components; determining a difference between the real time output power and a committed output power; and generating reference commands, based on the difference, for controlling at least one of, the wind farm component operating parameters, the farm-level operating parameters, the group level operating parameters, or combinations thereof to reduce the difference and dispatch the committed output power. 1. A multi-farm wind power dispatch management system comprising:wind turbine dispatch controllers for controlling wind power dispatch of respective wind farm components in respective wind farms based at least in part on wind farm component operating parameters;wind farm dispatch management systems for receiving the respective wind farm component operating parameters and generating respective farm-level operating parameters; a master dispatch management system for carrying out the steps of:', 'receiving the group-level operating parameters;', 'computing a real time output power generated by the wind farm components based on the group-level operating parameters;', 'determining a difference between the real time output power and a committed output power; and', 'generating reference commands, based on the difference, for controlling at least one of the wind farm component operating ...

HYBRID ELECTRIC POWER SYSTEM POWER CURVE AND PRODUCTIVITY

A method of a site evaluation for a hybrid wind/solar power generation plant, the method including generating a hybrid wind/solar power curve, the power curve including a plurality of solar power level curves, each solar power level curve including a combined wind and solar output power for at least one wind condition. Evaluating performance of the hybrid wind/solar power generation plant by analyzing the family of curves. A system for implementing the method and a non-transitory computer-readable medium are also disclosed. 1. A method of site evaluation for a hybrid wind/solar power generation plant , the method comprising:generating a hybrid wind/solar power curve, the power curve including a plurality of solar power level curves, each solar power level curve including a combined wind and solar output power for at least one wind speed operating point;evaluating performance of the hybrid wind/solar power generation plant by analyzing the family of curves;generating the hybrid wind/solar power curve including:obtaining wind turbine specifications and solar panel specifications for the hybrid wind/solar power generation plant;obtaining site-specific environmental condition data;selecting a wind condition;calculating a wind generated power contribution for the selected wind condition;calculating a solar power generated contribution for the selected wind condition; andcombining the wind power generated contribution and the solar power generated contribution to obtain a net power for the selected wind condition.2. The method of claim 1 , calculating the wind power generated contribution including:calculating wind power generated contribution by applying wind turbine specifications at the selected wind speed operating point for predetermined increments of time spanning a predetermined period of time; andaveraging the calculated wind power generated contribution for a window of time encompassing a plurality of the increments of time.3. The method of claim 2 , including ...

TWO-LEVEL PREDICTIVE BASED REACTIVE POWER COORDINATION AND VOLTAGE RESTORATION FOR MICROGRIDS

A computer-implemented method for controlling voltage fluctuations of a microgrid including a plurality of distributed generators (DGs) is presented. The computer-implemented method includes collecting, by a resiliency controller, measurement data from the microgrid, using a model predictive control (MPC) module to distribute reactive power to each of the DGs of the microgrid, and using a droop based controller to guide operation of each of the DGs of the microgrid. 1. A computer-implemented method executed on a processor for controlling voltage fluctuations of a microgrid including a plurality of distributed generators (DGs) , the method comprising:collecting, by a resiliency controller, measurement data from the microgrid;using a model predictive control (MPC) module to distribute reactive power to each of the DGs of the microgrid; andusing a droop based controller to guide operation of each of the DGs of the microgrid.2. The method of claim 1 , wherein the resiliency controller includes at least a voltage control module claim 1 , a frequency control module claim 1 , and a mode switching module.3. The method of claim 2 , wherein the voltage control module is executed by a reactive power distribution algorithm for distributing the reactive power to each of the DGs of the microgrid.4. The method of claim 2 , wherein the frequency control module utilizes the droop based controller to regulate a microgrid frequency.5. The method of claim 2 , wherein the mode switching module controls microgrid operation status transition between grid-tied mode and islanded mode.6. The method of claim 1 , wherein the MPC module computes voltage sensitivity factors to estimate a relationship between reactive power change and voltage change for each of the DGs of the microgrid.7. The method of claim 6 , wherein a prediction model for each of the DGs of the microgrid is estimated to predict a behavior of an energy management system in communication with the microgrid via the resiliency ...

MICROGRID REACTIVE POWER MANAGEMENT FOR VOLTAGE REGULATION DURING AND SUBSEQUENT TO ISLANDING

Methods and systems for power management include determining a voltage level of a grid; if the voltage level is below a lower voltage threshold, setting power outputs for one or more distributed generators on the grid to maximum; and if the voltage level is above the lower voltage threshold and below an upper voltage threshold, determining power outputs for one or more distributed generators on the grid using sensitivity-based distributed Q compensation. 1. A method for power management , comprising:determining a voltage level of a grid;if the voltage level is below a lower voltage threshold, setting power outputs for one or more distributed generators on the grid to maximum; andif the voltage level is above the lower voltage threshold and below an upper voltage threshold, determining power outputs for one or more distributed generators on the grid using sensitivity-based distributed Q compensation.2. The method of claim 1 , wherein sensitivity-based distributed Q compensation comprises minimizing a sum of power outputs across the distributed generators.3. The method of claim 2 , wherein a total voltage generated by the one or more distributed generators maintains the voltage level of the grid between the upper and lower voltage thresholds.4. The method of claim 3 , wherein the total voltage is a sum of a target bus voltage and a voltage deviation at the bus determined from a voltage sensitivity matrix.6. The method of claim 1 , wherein the grid comprises a dynamic load.7. The method of claim 6 , wherein the dynamic load comprises one or more single phase induction motors that have stalled.8. The method of claim 1 , wherein the conditional steps of setting power outputs are performed during an islanding condition in the grid.9. The method of claim 1 , wherein the conditional steps of setting power outputs are performed during a recovery period subsequent to islanding in the grid.10. The method of claim 1 , further comprising:measuring present voltages and currents ...

BOOST AND REGULATION GROUPS FOR WIND POWER PLANT

A method, control arrangement, and wind power plant (WPP) comprising a plurality of wind turbine generators (WTGs) are disclosed. The method includes operating, responsive to a received power demand corresponding to the WPP, a boost group of one or more WTGs of the plurality of WTGs to begin producing a boosted power output, wherein the boosted power output of each of the one or more WTGs of the boost group is regulated independent of the power demand. The method further includes determining, based on a measured amount of boosted power production, power production set points for a regulation group of one or more different WTGs of the plurality of WTGs to thereby meet the power demand. 1. A method of controlling a power output of a wind power plant (WPP) comprising a plurality of wind turbine generators (WTGs) , the method comprising:operating, responsive to a received power demand corresponding to the WPP, a boost group of one or more WTGs of the plurality of WTGs to begin producing a boosted power output; anddetermining, based on a measured amount of boosted power production, power production set points for a regulation group of one or more different WTGs of the plurality of WTGs to thereby meet the power demand.2. The method of claim 1 , further comprising:calculating, for at least one of the plurality of WTGs, a corresponding boost quality value; anddetermining, based on the calculated boost quality value, a number of WTGs to include in the regulation group of WTGs.3. The method of claim 1 , wherein operating the boost group is performed without providing a substantially continuous regulation of boosted power production.4. The method of any of claim 1 , further comprising:calculating, for each WTG of the plurality of WTGs, a respective boost quality value; anddetermining, based on the calculated boost quality values, which of the plurality of WTGs to include in the boost group of WTGs.5. The method of claim 2 , wherein calculating the boost quality value is based ...

TEST METHOD FOR TESTING THE BEHAVIOR OF A WIND FARM IN RESPONSE TO AN UNDERFREQUENCY EVENT

A test method for testing a behavior of a wind farm in response to a frequency event is provided. The wind farm has wind power plants, which supply electrical power to a grid which has a grid voltage and with a grid frequency. Each plant has a frequency mode in which the supplied power is temporarily modified per the grid frequency if a frequency event occurs. In a farm testing mode, if a frequency event occurs, each plant changes its frequency mode and the frequency modes are simultaneously tested to test the behavior of the farm. Each frequency mode uses a test frequency function emulating a frequency event, instead of a measured frequency, and the frequency modes are coordinated such that the plants controlled by a common time start command, start their frequency modes simultaneously, and an identical test frequency function is defined for each of the plants. 1. A method for testing a behavior of a wind farm in response to a frequency event , the wind farm including a plurality of wind power installations which feed electrical power into an electrical supply grid , each wind power installation of the plurality of wind power installations has a rotor with one or more rotor blades and generates wind power from wind and feeds the wind power into the electrical supply grid , which has a grid voltage and a grid frequency , the method comprising:temporarily changing a fed-in power of a respective frequency mode of each wind power installation of the plurality of wind power installations based on the grid frequency when the frequency event occurs;changing the respective frequency mode of each wind power installation of the plurality of wind power installations in a farm test mode for testing the behavior of the wind farm in the frequency event; and starting the frequency modes simultaneously using a common time start command; and', 'setting an identical test frequency function for each wind power installation of the plurality of wind power installations., 'testing ...

USE OF DISTRIBUTED GENERATOR (DG) INVERTERS AS STATCOMS FOR DECREASING LINE LOSSES

The invention provides systems, methods, and devices relating to the provision of system-wide coordinated control voltage regulation support in power transmission and distribution networks using multiple inverter based power generation or absorption facilities, which are coupled to the power transmission and distribution networks for minimizing transmission and distribution line losses and for performing Conservation Voltage Reduction. The invention uses a novel control method of inverter based Distributed Generators as Static Synchronous Compensator (STATCOM) in a way that provides a dynamic voltage regulation/control with the inverter capacity remaining after real power generation or absorption, thereby decreasing system line losses and performing Conservation Voltage Reduction. 1. A method for use in a power transmission and distribution network , the method comprising:a) determining a specific voltage for a specific location on said power transmission and distribution network, said specific location corresponding to a specific inverter based power generation facility, said specific voltage being determined based on an optimal load flow determination performed at said specific inverter based power generation facility;b) regulating a voltage at a point of common coupling for said specific inverter based power generation facility, said voltage being regulated towards said specific voltage through injecting or absorbing controlled reactive power with said power transmission and distribution network, said controlled reactive power being based on an inverter capacity for said specific inverter based power generation facility available after real power generation, wherein a normal real power production of said specific inverter based power generation facility continues while injecting or absorbing controlled reactive power with said power transmission and distribution network;c) repeating all preceding steps at a set time interval;wherein an inverter of said specific ...

POWER PLANT RAMP RATE CONTROL

A method for controlling plant active power output ramp rate of a power plant to a PCC with a power grid includes obtaining information about a current RES active power output of a Renewable Energy Source (RES) in the power plant. The method also includes forecasting future RES active power output, during a predefined future time period. The method also includes, based on the obtained current RES active power output information and on the forecasted RES active power output, determining whether an expected ramp rate of the RES active power output during the predefined time period exceeds a predefined maximum ramp rate limit of a plant active power output. The method also includes, based on the determining, selecting a first control method which is based on the forecasted future RES active power output if it is determined that the expected ramp rate exceeds the predefined maximum ramp rate limit, or selecting a second control method, different from the first control method, if it is determined that the expected ramp rate does not exceed the predefined maximum ramp rate limit. The method also includes using the selected first or second control method to generate an ESS control signal for controlling the ESS active power output Psuch that the plant active power output ramp rate is kept below the predefined maximum ramp rate limit during the predefined time period. 111.-. (canceled)12. A method for controlling plant active power output ramp rate of a power plant to a Point of Common Coupling , PCC , with a power grid , the method comprising:obtaining information about a current RES active power output of a Renewable Energy Source, RES, comprised in the power plant;forecasting future RES active power output, during a predefined future time period, based on input signals from a meteorological sensor;based on the obtained current RES active power output information and on the forecasted RES active power output, determining whether an expected ramp rate of the RES active ...

POWER GENERATION SYSTEM, POWER CONDITIONER, POWER CONTROL DEVICE, POWER CONTROL METHOD, AND POWER CONTROL PROGRAM

A power generation system and a power control device are provided that, even if there are provided a storage battery and a power conditioner as two independent devices, are capable of supplying electric power at least to the power conditioner in a power outage. The power generation system () includes the control device () connected to a second storage battery () so the that power conditioner () is fed with electric power by a power generation device (), a commercial power grid () and a first storage battery (). 1. A power generation system to be connected to a power grid and an autonomous load system , said power generation system comprising: a power generation device; a first power storage device; a power conditioner; a second power storage device; and a control device , wherein:the power conditioner has a first AC power distribution path and a second AC power distribution path to which the power grid and the autonomous load system are to be connected respectively;the power conditioner has a first DC power distribution path and a second DC power distribution path to which the power generation device and the first power storage device are connected respectively;the first DC power distribution path can be electrically connected to the second DC power distribution path;the second power storage device is to be connected to the autonomous load system;the control device is connected to the second power storage device;electric power can be supplied to the power conditioner from the power grid, the power generation device, and the first power storage device; andthe control device can communicate with the first power storage device, the power conditioner, and the second power storage device.2. The power generation system according to claim 1 , the first power storage device including a charge switch for charging and a discharge switch for discharging claim 1 , wherein the control device claim 1 , upon receiving a malfunction status of the power grid from the power ...

METHOD AND APPARATUS FOR BIDIRECTIONAL STORAGE AND RENEWABLE POWER CONVERTER

An energy storage system for renewable energy applications includes a renewable energy source, a bidirectional inverter connected an AC bus and a DC bus, an energy storage unit connected to the bidirectional DC/DC converter, and a control system comprising one or more controllers coupled to the bidirectional inverter and the bidirectional DC/DC converter. The bidirectional inverter is connected to the renewable energy source and a bidirectional DC/DC converter through the DC bus. The control system is configured to facilitate the operation of the bidirectional DC/DC converter and the bidirectional inverter. The energy storage system both stores energy from the renewable energy source and a utility grid, and also supplies power to the utility grid. The energy storage system is utilized in a method for supporting frequency regulation of a utility grid and a method for controlling an output power ramp rate for a renewable energy storage system. 1. An energy storage system for renewable energy applications , comprising:a renewable energy source;a bidirectional inverter connected to an AC bus and a DC bus, wherein the bidirectional inverter is connected to the renewable energy source and a bidirectional DC/DC converter through the DC bus;an energy storage unit connected to the bidirectional DC/DC converter; anda control system comprising one or more controllers coupled to the bidirectional inverter and the bidirectional DC/DC converter, the control system configured to facilitate the operation of the bidirectional DC/DC converter and the bidirectional inverter.2. The energy storage system of claim 1 , wherein the renewable energy source is at least one of a photovoltaic (PV) array claim 1 , a wind energy source claim 1 , or a hydro energy source.3. The energy storage system of claim 1 , wherein the bidirectional inverter is connected to at least one of a utility grid claim 1 , a local load claim 1 , or a microgrid through the AC bus.4. The energy storage system of claim ...

METHODS OF ADVANCED GRID AND MICROGRID SUPPORT FUNCTIONALITIES THROUGH HYBRID FUEL CELL SYSTEMS

A method of controlling an inverter having a three phase output and a plurality of single phase loads connected to respective one of the three phases of the three phase output includes determining if a first phase of the three phase output has a heavier load than a second phase of the three phase output, and providing a higher output power from the inverter to the first phase than to the second phase if it is determined that the first phase has a heavier load than the second phase. 1. A method of controlling an inverter having a three phase output and a plurality of single phase loads connected to respective one of the three phases of the three phase output , comprising:determining if a first phase of the three phase output has a heavier load than a second phase of the three phase output; andproviding a higher output power from the inverter to the first phase than to the second phase if it is determined that the first phase has a heavier load than the second phase.2. The method of claim 1 , wherein the inverter has a three phase input connected to an output of a direct current (DC) distributed power source.3. The method of claim 2 , further comprising controlling the inverter to draw more power from the DC distributed power source on a first phase of the three phase input connected to the DC distributed power source which corresponds to the first phase of the three phase output of the inverter than to a second phase of the three phase input which is connected to the DC distributed power source which corresponds to the second phase of the three phase output.4. The method of claim 2 , wherein the DC distributed power source includes one or more of a fuel cell system claim 2 , a solar array claim 2 , thermoelectric device or wind turbine with alternating current (AC) to DC rectifier.5. The method of claim 2 , wherein the DC distributed power source comprises a fuel cell system which includes a power storage device.6. The method of claim 2 , wherein:the plurality of ...

OPPOSING CONTACTORS FOR ENERGY STORAGE DEVICE ISOLATION

An energy storage system can include an energy storage device, such as a battery energy storage device, having a first terminal and a second terminal. A first unidirectional contactor can be coupled to the first terminal. A second unidirectional contactor can be coupled to the second terminal. The first unidirectional contactor can be coupled to the energy storage device with opposite polarity relative to the second unidirectional contactor. The first unidirectional contactor and the second unidirectional contactor can be controlled based on direction of current flow associated with the energy storage device. 1. A method for controlling a plurality of contactors in an energy storage system having a first unidirectional contactor coupled to a first terminal of an energy storage device and a second unidirectional contactor coupled to a second terminal of the energy storage device , the first unidirectional contactor coupled to the energy storage device with opposite polarity relative to the second unidirectional contactor , the method comprising:determining a isolating condition for the energy storage device;determining a direction of current flow associated with the energy storage device; andcontrolling operation of the first unidirectional contactor and the second unidirectional contactor based at least in part on the direction of current flow associated with the energy storage device.2. The method of claim 1 , wherein when the direction of current flow is determined to be flowing in a first direction claim 1 , controlling the operation of the first unidirectional contactor and the second unidirectional contactor comprises:opening the first unidirectional contactor;subsequent to opening the first unidirectional contactor, opening the second unidirectional contactor.3. The method of claim 1 , wherein when the direction of current flow is determined to be flowing in a second direction claim 1 , controlling operation of the first unidirectional contactor and the second ...

SYSTEMS, DEVICES AND METHODS FOR ELECTRICITY PROVISION, USAGE MONITORING, ANALYSIS, AND ENABLING IMPROVEMENTS IN EFFICIENCY

The present invention relates generally to systems, devices and methods for the efficient use of utilities, more particularly to the distribution and provision of electricity supply at appropriate voltages, monitoring and usage by end devices, and to facilitating consumers in changing their energy usage behaviour, and to adopt and easily install appropriate sustainable, energy efficient or renewable technologies. Said end devices typically including traditional electric, electronic and lighting appliances requiring AC or DC power provision or low voltage DC power via AC/DC converters. 1. An energy server for providing electrical power in an energy network , comprising:a rechargeable battery;power connector sockets configured to connect to available power supplies in the energy network, including a first power connector socket configured to connect to an AC mains supply and a second power connector socket configured to connect to a local renewable energy supply;power conversion circuitry; andcontrol circuitry configured to manage available power supplies to recharge the battery to store battery power and to manage the rechargeable battery to provide stored battery power to connected loads.2. The energy server according to further comprising one or more DC connector sockets configured to provide power to end devices or lighting in the energy network.3. The energy server according to claim 1 , wherein the control circuitry is configured to recharge the battery from the renewable energy supply by preference claim 1 , or else by AC mains supply when a power unit cost of the AC mains supply is low.4. The energy server according to further comprising one or more DC connector sockets configured to provide power to end devices or lighting in the energy network claim 1 , wherein the control circuitry is configured to use the renewable energy supply to provide power to said end devices or lighting if sufficient.5. The energy server according to wherein claim 4 , if the ...

ENERGY GENERATION INTERCONNECTION

Methods and apparatus for controlling an interconnection device may be provided. Sockets of the interconnection device may be configured to electrically couple to respective energy-generation modules. In some examples, the interconnection device may include a connector, memory, and a processor configured to execute instructions for managing the electrical configuration of the sockets. 1. An interconnection system , comprising:a connector including a plurality of sockets, each socket of the plurality of sockets configured to electrically couple to a respective energy-generation module of a plurality of energy-generation modules;a memory for storing computer-executable instructions; and receive electrical performance characteristics of at least one energy-generation module; and', 'configure electrical connectivity of the plurality of sockets in any combination of series and parallel arrangements based at least in part on the electrical performance characteristics., 'a processor configured to access the memory and execute the computer-executable instructions to at least2. The system of claim 1 , wherein the configured combination of series and parallel arrangements of the plurality of sockets is different from a second combination of series and parallel arrangements of the plurality of sockets that was configured prior to receipt of the electrical performance characteristics.3. The system of claim 2 , wherein the second combination of series and parallel arrangements is less efficient than the configured combination of series and parallel arrangements associated with the configured electrical connectivity of the plurality of sockets.4. The system of claim 1 , further comprising means for measuring the electrical performance characteristics of the at least one energy-generation module.5. The system of claim 1 , further comprising a communication device configured to receive information from a second interconnection system.6. The system of claim 1 , wherein the ...

Device for reducing the electric power consumed by at least one power electric load, associated system and method

A method relating to a device ( 1 ) for driving at least one power electric load ( 2 ) with the aim of reducing the electric power liable to be consumed or which is actually consumed in a terminal installation ( 4 ) of an electrical network including an electrical energy meter behind which the device is connected. A system ( 12 ) including such a device and at least one power electric load ( 2 ) is also described. Also described is a method for exploiting a plurality of systems ( 12 ) within an electrical network as well as the applications of this method for the management of an electrical network including intermittent-production energy sources, within the framework of a service for managing reduction in electrical energy consumption and/or to supplement a service for providing sanitary hot water, and/or heating, and/or cooling, and/or for providing electricity.

IMPROVEMENTS IN OR RELATING TO VOLTAGE SOURCE CONVENTORS

A wind farm side voltage source converter comprises a DC terminal for connection to a DC transmission link, an AC terminal for connection to a wind farm that includes at least one wind turbine, and a main controller. The main controller is configured to modify an active power demand (P) of the voltage source converter which is received from a higher level controller by introducing an artificial inertia factor and/or in response to a measured DC voltage (V) at the DC terminal. 1. A wind farm side voltage source converter comprising:a DC terminal for connection to a DC transmission link;an AC terminal for connection to a wind farm including at least one wind turbine; anda main controller configured to modify an active power demand of the voltage source converter received from a higher level controller by introducing an artificial inertia factor and/or in response to a measured DC voltage at the DC terminal.2. A wind farm side voltage source converter according to wherein the main controller includes a power-frequency slope sub-controller and the main controller is configured to modify the active power demand of the voltage source converter by passing the active power demand through the power-frequency slope sub-controller and thereafter applying an artificial inertia factor to the resulting frequency.3. A wind farm side voltage source converter according to wherein the power-frequency slope sub-controller is configured itself to apply the artificial inertia factor.4. A wind farm side voltage source converter according to wherein the artificial inertia factor takes the form of a lagging function.5. A wind farm side voltage source converter according to wherein the main controller is configured to modify the active power demand of the voltage source converter received from a higher level controller in response to a measured DC voltage at the DC terminal by comparing the measured DC voltage with an expected DC voltage based on a DC voltage demand received from a higher ...

Systems and Methods for Controlling Electrical Power Systems Connected to a Power Grid

The present application relates to a method for controlling a power system connected to a power grid, including: receiving a reactive power instruction and a measured reactive power from a generator; generating a reactive power error signal based on the difference between the reactive power instruction and the measured reactive power; receiving the reactive power error signal; generating a voltage instruction based on reactive power error signal; generating a voltage droop signal based on a reference reactance and a voltage at a point of common coupling; generating a voltage error signal according to at least one of the voltage instruction or the measured terminal voltage of the generator and the voltage droop signal; and producing a reactive current instruction for the converter power path based on the voltage error signal. The present application also discloses a control system for a power system connected to a power grid and a wind farm. 1. A method for controlling a power system connected to a power grid , the power system having a plurality of power subsystem clusters , each of the power subsystems including a generator and defining a stator power path and a converter power path for supplying power to the power grid , the converter power path having a partial power transformer and a rotor power path , the method comprising:receiving, by a controller, a reactive power instruction and a measured reactive power from the generator;generating a reactive power error signal by the controller based on a difference between the reactive power instruction and the measured reactive power;receiving the reactive power error signal by a reactive power regulator;generating a voltage instruction by the reactive power regulator based on the reactive power error signal;generating a voltage droop signal by a droop controller based on a reference reactance and a voltage at a point of common coupling;generating, by the controller, the voltage error signal according to at least one ...

METHOD FOR OPERATING A WIND TURBINE

A method for operating a wind power installation which is connected to a network connection point of an electrical supply network and is intended to produce and feed electrical energy into the electrical supply network, wherein the electrical supply network has a network nominal frequency and is operated at a network frequency, and the wind power installation which comprises an electrical generator with a generator nominal power can be regulated on the basis of the network frequency, comprising the steps of: using the electrical generator to produce an electrical generator power for feeding into the electrical supply network, feeding the electrical generator power or a part of it into the electrical supply network as electrical feed-in power on the basis of the network frequency, wherein, in a first supporting stage, the electrical generator power is reduced on the basis of the network frequency in order to accordingly reduce the electrical feed-in power, and, in a second supporting stage, the electrical feed-in power is reduced such that the electrical feed-in power is less than the electrical generator power. 1. A method for operating a wind power installation that is connected to a network connection point of an electrical supply network , wherein the wind power installation is configured to produce and feed provide electrical energy into the electrical supply network , wherein the electrical supply network has a network nominal frequency and is operated at a network frequency , and wherein the wind power installation comprises an electrical generator with a generator nominal power , wherein the electrical generator is configured to can be regulated based on the network frequency , the method comprising:using the electrical generator to produce an electrical generator power for providing into the electrical supply network; andproviding at least a portion of the electrical generator power into the electrical supply network as electrical feed-in power based on the ...

Third party energy management

A system of modules which control and measure energy usage at a building which are in communication with a software program executing on a remote server controlled by a third party. The third party said usage via the software program which communicates with the modules to modify energy usage and demand for energy and is responsible or liable for energy usage charges the building where the third party does not actually use the energy.

ELECTRIC POWER CONVERSION DEVICE

A power conversion device includes M number of DC/DC converters, first-side terminals of the DC/DC converters are connected so that common current flows between both positive and negative terminals of first DC terminals of the power conversion device, and second-side terminals thereof are connected so that common current flows between both positive and negative terminals of second DC terminals of the power conversion device. The power conversion device further includes M-1 number of auxiliary converters each connected between two DC/DC converters and performing DC/DC conversion. The DC/DC converters control voltages of the second-side terminals and input voltage of the power conversion device. Each auxiliary converter controls voltages of the first-side terminals of the two DC/DC converters so as to be equalized. 1. A power conversion device comprising:a power conversion unit including M number of DC/DC converters between first DC terminals and second DC terminals each pair of which is composed of both positive and negative terminals, where M is two or greater, the power conversion unit performing power transmission between the first DC terminals and the second DC terminals; anda controller for controlling the power conversion unit, whereinthe power conversion unit further includes one or more balancing circuits each connected between two of the DC/DC converters and balancing powers of the two DC/DC converters,in the M number of DC/DC converters, one of input and output thereof is defined as a first side and the other one is defined as a second side, first-side terminals of the DC/DC converters are connected so that current flows in common between both positive and negative terminals of the first DC terminals, and second-side terminals of the DC/DC converters are connected so that current flows in common between both positive and negative terminals of the second DC terminals, andeach balancing circuit is connected between two pairs of the first-side terminals of the ...

SYSTEMS AND METHODS FOR STABILIZER CONTROL

A method, apparatus, system and computer program is provided for controlling an electric power system, including implementation of a voltage control and conservation (VCC) system used to optimally control the independent voltage and capacitor banks using a linear optimization methodology to minimize the losses in the EEDCS and the EUS. An energy validation process system (EVP) is provided which is used to document the savings of the VCC and an EPP is used to optimize improvements to the EEDCS for continuously improving the energy losses in the EEDS. The EVP system measures the improvement in the EEDS a result of operating the VCC system in the “ON” state determining the level of energy conservation achieved by the VCC system. In addition the VCC system monitors pattern recognition events and compares them to the report-by-exception data to detect HVL events. If one is detected the VCC optimizes the capacity of the EEDS to respond to the HVL events by centering the piecewise linear solution maximizing the ability of the EDDS to absorb the HVL event. The VCC stabilizer function integrates voltage data from AMI meters and assess the state of the grid and initiates appropriate voltage control actions to hedge against predictable voltage risks. 1. A control system for an electric power transmission and distribution grid configured to supply electric power from a supply point to a plurality of user locations , the system comprising:a plurality of sensors, wherein each sensor is located at a respective one of a plurality of distribution locations on the distribution grid at or between the supply point and at least one of the plurality of user locations, and wherein each sensor is configured to sense a component of the supplied electric power at the respective distribution location and to generate measurement data based on the sensed component of the power;a controller configured to generate an energy delivery parameter based on a comparison of the measurement data received ...

METHOD AND DEVICE FOR DETERMINING SAFE THRESHOLD FOR POWER GRID VOLTAGE OF WIND FARM CONVERGING AREA

Disclosed are a method and a device for determining safe threshold for power grid voltage of a wind farm converging area, The method includes: obtaining ground state voltage; obtaining upper and lower limit voltage of the output bus, first lower and upper limit of reactive powers of fans and compensation devices, and lower and upper limit of active power fluctuations; obtaining second lower and upper limit of reactive powers of fans and compensation devices; determining whether voltage error is greater than a predetermined threshold; replacing the first lower and upper limit of the reactive powers of fans and the reactive powers of compensation devices with the second lower and upper limit of reactive powers of fans and compensation devices respectively, and repeating above steps if the voltage error is greater than the predetermined threshold, else defining the upper and lower limit voltage of the output bus as a safe threshold. 1. A method for determining a safe threshold for power grid voltage of a wind farm converging area , comprising the following acts performed by an automatic voltage control system of the power grid:step A: obtaining a ground state voltage of an output bus of each wind farm in the wind farm converging area;step B: obtaining an upper limit voltage and a lower limit voltage of the output bus of each wind farm, a first lower limit and a first upper limit of reactive powers of fans in each wind farm, a first lower limit and a first upper limit of reactive powers of compensation devices in each wind farm, and a lower limit and an upper limit of active power fluctuations of the fans in each wind farm according to the ground state voltage of the output bus of each wind farm;step C: obtaining a second lower limit and a second upper limit of the reactive powers of the fans in each wind farm, a second lower limit and a second upper limit of the reactive powers of the compensation devices in each wind farm according to the upper limit voltage and the ...

Building and Building Cluster Energy Management and Optimization System and Method

Disclosed are various embodiments for optimizing energy management. A quantity of renewable power that will be generated by renewable energy generation sources can be forecasted. The energy demand for a building or a cluster of buildings can be forecasted. A pricing model for buying energy from a grid can be determined. A quantity of energy to import from the grid or export to the grid can be scheduled based on the quantity of renewable energy forecasted and the state of charge or health of battery energy storage system, current and future operations of building HVAC, lighting and plug loads system, the forecasted energy demand for the building, and the pricing of the energy from the grid. 1. A system comprising:a data store; and forecast a quantity of renewable power from a plurality of renewable energy generation sources;', 'forecast an energy demand for at least one building;', 'determine pricing for energy on a grid; and', 'schedule a quantity of energy to import to the grid or export from the grid based at least in part on the forecasted quantity of renewable power, the forecasted energy demand, and the real-time pricing for energy on the grid., 'at least one computing device in communication with the data store, the at least one computing device configured to at least2. The system of claim 1 , wherein the at least one computing device is configured to at least determine at least one weather forecast for at least one local area corresponding to at least one of the plurality of renewable energy generation sources claim 1 , wherein the forecasted quantity of renewable power is based at least in part on the at least one weather forecast.3. The system of claim 1 , wherein the at least one computing device is configured to at least determine at least one weather forecast for at least one local area corresponding to the at least one building claim 1 , wherein the forecasted energy demand is based at least in part on the at least one weather forecast.4. The system of ...

WIND PARK WITH MULTIPLE WIND TURBINES

A wind park for feeding power into a supply network at a connection point is provided. The wind park includes wind turbines for generating the power, a DC network for transmitting the power to the connection point, an inverter configured to transform electrical DC voltage into an AC voltage for feeding the power into the supply network, at least one DC-DC converter for feeding the power into the DC network. The DC-DC converter includes a switching device and a transformer with primary and secondary sides. The primary side is coupled to the at least one wind turbine via the switching device and the secondary side is coupled to the DC park network via at least one rectifier. The DC-DC converter is configured to apply a DC voltage of changing polarity to the primary side by the switching device to transform a DC voltage of the at least one wind turbine. 1. A wind park for feeding electrical power into an electrical supply network at a network connection point , comprising:at least two wind turbines for generating the electrical power;a direct current (DC) park network for transmitting the electrical power from the at least two wind turbines to the network connection point;an inverter arranged between the DC park network and the network connection point and configured to transform electrical DC voltage of the DC park network into an alternating current (AC) voltage for feeding the electrical power of the at least two wind turbines into the electrical supply network; and the at least one DC-DC converter includes a switching device and a transformer with a primary side and a secondary side,', 'the primary side is coupled to the at least one wind turbine via the switching device,', 'the secondary side is coupled to the DC park network via at least one rectifier having a plurality of diodes, and', 'the DC-DC converter is configured to apply a DC voltage of changing polarity to the primary side of the transformer using the switching device thereby transforming a DC voltage ...

SYSTEM AND METHOD FOR PERFORMING WIND FORECASTING

A system and method for performing novel wind forecasting that is particularly accurate for forecasting over short-term time periods, e.g., over the next 1-5 hours. Such wind forecasting is particularly advantageous in wind energy applications. The disclosed method is anchored in a robust physical model of the wind variability in the atmospheric boundary layer (ABL). The disclosed method approach leverages a physical framework based on the unsteady dynamics of earth's atmosphere, and drives forecasting as a function of previously-observed atmospheric condition data observed at the same location for which a wind forecast is desired. 1. A computer-implemented method for performing wind forecasting using a computer-implemented wind forecasting system comprising a microprocessor , a memory operatively coupled to the microprocessor , and microprocessor-executable instructions for causing the wind forecasting system to perform the wind forecasting method , the method comprising:storing, at the wind forecasting system, a model correlating large-scale atmospheric pressure forces to time-dependent horizontal wind speed and direction for a particular geographical region;receiving, at the wind forecasting system, data reflecting a time-dependent horizontal wind velocity vector for the geographical region during a preceding period of time, the preceding period of time preceding a reference time;determining, at the wind forecasting system, a trend reflecting changes over time of large-scale atmospheric pressure forces for the geographical region during the preceding period of time as a function of the time-dependent wind velocity vector, according to the model;extrapolating, at the wind forecasting system, the trend in large-scale atmospheric pressure forces for the preceding period of time to determine forecasted large-scale atmospheric pressure forces for a future period of time, the future period of time being a period of time succeeding the reference time; anddetermining, at ...

MAXIMIZING ENERGY SAVINGS BY UTILIZING CONSERVATION VOLTAGE REDUCTION WITH ADAPTIVE VOLTAGE CONTROL AND PEAK DEMAND REDUCTION AT POINT OF USE

In the present legacy electrical power generation and distribution system, the power quality delivered to end consumers is being degraded by a number of disruptive technologies and legislative impacts; especially with the rapidly increasing myriad of privately owned and operated domestic and commercial distributed energy generation (DEG) devices connected at any point across a low voltage (LV) distribution network. The present invention bypasses this increasing critical DEG problem by offering a solution comprising an energy processing unit (EPU) that is installed at the customer's electrical power point of use (POU). And because of the controlled tightly voltage regulated output of the EPU, significant energy savings can be achieved through dynamic voltage control, utilizing the CVR effect, reduced reactive power demand, and reduced or eliminated peak demand billings. 1. An electrical power distribution system with distributed energy generation , comprising:an electrical power distribution network;one or more energy processing units each being installed directly at one of one or more points of use;wherein each of the energy processing units having an input connection connected to the electrical power distribution network and an output connection connected to one or more of loads and distributed energy generation devices in the point of use at which the energy processing unit is installed;wherein each of the energy processing units generates a regulated output voltage at its output from an unregulated input voltage in the electrical power distribution network at the energy processing unit input;wherein each of the energy processing units comprises a series voltage regulator and generates its regulated output voltage using a series voltage regulation method;wherein each of the energy processing units being electrical bidirectional allowing energy recovery of excess energy generated by any distributed energy generation device in the point of use at which the energy ...

ENERGY TRANSMISSION, GENERATION, AND UTILIZATION DEVICE AND METHOD

The power generation and transmission device and method is able to be used to harness power such as solar and/or wind power and then transmit the power to a device on the other side of a physical structure such as a house, a car, a umbrella, a tent, and an awning. 1. A renewable energy transmission device comprising:a. a renewable energy receiving component;b. a first member with a first plurality of lights; andc. a second member magnetically coupled with the first member, wherein the second member includes a second plurality of lights, wherein the first plurality of lights and the second plurality of lights are powered by the renewable energy receiving component.2. The device of claim 1 , wherein the renewable energy receiving component comprises a solar panel.3. The device of claim 1 , wherein the renewable energy receiving component comprises a wind turbine.4. The device of claim 1 , wherein the first member comprises one or more magnets.5. The device of claim 4 , wherein one or more magnets comprises a first magnet having a magnetic field substantially parallel with a magnetic field of a second magnet.6. The device of claim 1 , wherein the second member comprises a first set of one or more magnets claim 1 , wherein the first set of one or more magnets are arranged in a way capable of coupling with a second set of one or more magnets of the first member.7. The device of claim 1 , wherein the second member couples with a generator capable of generating electricity.8. The device of claim 1 , wherein the first member and the second member are configured to couple to each other with an object between the first member and the second member. This application is a continuation application of co-pending U.S. patent application Ser. No. 13/874,630, filed on May 1, 2013 and titled, “RENEWABLE ENERGY TRANSMISSION, GENERATION, AND UTILIZATION DEVICE AND METHOD,” which is a continuation application of co-pending U.S. patent application Ser. No. 12/774,392, filed on May 5, ...

POWER SOURCE SYSTEM

A power source system includes: a power storage device; a switch portion for connecting or disconnecting the power storage device to or from outside; a converter for converting electric power output from a power generation apparatus into external power; and a control unit for controlling a connection or disconnection operation of the switch portion, in which the control unit is for: disconnecting, when an output current of the power generation apparatus is low current, connection between the power storage device and the outside to charge the power storage device with the electric power output from the power generation apparatus; and controlling, when a voltage of the power storage device becomes higher than an operating voltage of the converter as a result of the charging, the connection or disconnection operation of the switch portion so as to connect the power storage device and the converter to output the stored electric power. 1. A power source system , which is configured to receive an electric power from a power generation apparatus having a varying output , and to output the electric power which is received to a converter , and the power source system comprising:a power storage device, configured to store the electric power of the power generation apparatus, and to discharge the electric power which is stored;a first switch portion, provided on a wiring line connecting the power generation apparatus and the converter;a second switch portion, provided between a point between the power generation apparatus and the first switch portion on the wiring line, and the power storage device; anda control unit, configured to control a connection or disconnection operation of the first switch portion and the second switch portion, disconnect the first switch portion and connect the second switch portion, so as to perform a charging to the power storage device with the electric power output from the power generation apparatus, when an output current of the power ...

CONTROLLER SELF-COMMISSIONING FOR THREE-PHASE ACTIVE POWER ELECTRONICS CONVERTERS

A system for modulating a current level of a power grid includes a perturbation module that injects a sinusoidal signal, at a cross-over frequency, to modulate a duty cycle to a power converter connected to the power grid; a current controller that monitors a reference current and a current at grid-side terminal of the power converter, the current controller further monitors a current of the power grid; and a parameter calculation module that calculates a plurality of gain values for the current controller based at least in part on a phase margin, a cross-over frequency, a current of an alternating current side of the power converter, and the duty cycle. 1. A system for modulating a current level of a power converter connected to a grid , the system comprising:a perturbation module that injects a sinusoidal signal, at a single frequency which is a cross-over frequency of a controller of the power converter, to provide a duty cycle to a power converter connected to the power grid; anda parameter calculation module that calculates a plurality of gain values for the controller based at least in part on a phase margin, a cross-over frequency, a current of an alternating current side of the power converter, and the duty cycle.2. The system of claim 1 , wherein the controller is a current controller that monitors at least a power converter current and at least a reference current claim 1 , wherein the power converter current is measured at alternating current terminals of the power converter.3. The system of claim 1 , wherein the duty cycle is further determined by a modulation of the sinusoidal signal and an output of a current controller claim 1 , wherein a reference provided for the current is provided by a voltage controller regulating a voltage across a capacitor in a direct current link.4. The system of claim 3 , wherein the output of the current controller is determined by the gain values calculated by the parameter calculation module and the current.5. The system ...

System and Method for Operating a Wind Turbine Power System During Low Wind Speeds to Improve Efficiency

A method for operating a wind turbine power system that supplies real and reactive power to a grid includes operating a generator of the wind turbine power system up to a first speed limit. The method also includes monitoring a wind speed at the wind turbine power system. When the wind speed drops below a predetermined threshold, the method includes reducing the first speed limit of the generator to a reduced speed limit of the generator. Further, the method includes operating the generator at the reduced speed limit for as long as the wind speed remains below the predetermined threshold so as to optimize a tip-speed-ratio of the wind turbine power system during low wind speeds, thereby increasing power production of the wind turbine power system at low wind speeds. 1. A method for operating a wind turbine power system that supplies real and reactive power to a grid , the wind turbine power system including a generator coupled to a power converter , the method comprising:operating the generator of the wind turbine power system up to a first speed limit;monitoring a wind speed at the wind turbine power system;when the wind speed drops below a predetermined threshold, reducing the first speed limit of the generator to a reduced speed limit of the generator, the predetermined threshold being greater than a cut-in wind speed of the wind turbine and less than about 5 meters/second (m/s); andoperating the generator at the reduced speed limit for as long as the wind speed remains below the predetermined threshold so as to optimize a tip-speed-ratio of the wind turbine power system during low wind speeds, thereby increasing power production of the wind turbine power system at low wind speeds.2. (canceled)3. The method of claim 1 , wherein the reduced speed limit ranges from about 85% to about 95% of the first speed limit.4. The method of claim 1 , wherein reducing the first speed limit of the generator to the reduced speed limit of the generator increases a power ...

DYNAMIC DEMAND RESPONSE IN A RENEWABLE ENERGY-BASED ELECTRICITY GRID INFRASTRUCTURE

In a renewable energy-based electricity grid infrastructure, distributed data analytics enable modeling and delivery of an appropriate, time-sensitive, dynamic demand response from multiple renewable energy resource components to an intelligent power distribution network. Distributed data analytics also enable the electricity grid infrastructure to virtually, optimally and adaptively make decisions about power production, distribution, and consumption so that a demand response is a dynamic reaction across the electricity grid infrastructure in a distributed energy generation from multiple renewable energy resources responsive to various types of grid demand situations, such as customer demand, direct current-specific demand, and security issues, and so that power production is substantially balanced with power consumption. 1. A method of realizing a dynamic demand response in a renewable energy-based electricity grid infrastructure , comprising:identifying a power requirement over a specified period of time for an intelligent power distribution network;identifying an operational capacity of a plurality of renewable energy components over the specified period of time at one or more offshore renewable energy installations;adjusting a power output of the plurality of renewable energy components and within the operational capacity to match the power requirement for the specified period of time; anddelivering a combined power output of the plurality of renewable energy components as a dynamic demand response to the power requirement from the one or more offshore renewable energy installations to the intelligent power distribution network so that power consumption and power production are balanced for the specified period of time,wherein the one or more offshore renewable energy installations each include a wind component, a photovoltaic component, a hydroelectric component, and a solar thermal component that together comprise the plurality of renewable energy components. ...

ENERGY PROCESSING AND STORAGE

Systems, methods, devices and apparatus for operating an energy system that can include an energy storage system. 154-. (canceled)55. A system for delivering electricity from an electrical production and storage site , comprising:a power supply plant with a storage system including a first storage component configured to store power from a grid and deliver power to the grid at first load and capacity tracking rates;the power supply plant storage system including a second storage component configured to store power from a grid and deliver power to the grid at second load and capacity tracking rates that are slower than the first load and capacity tracking rates;a first power generation element whose output capacity is limited and variable;a second power generation element whose output capacity is selectable at will;a processor-based programmable control system with memory and connected to sensors adapted for receiving signals indicating a current net demand or excess capacity of the grid and further to detect a rate of change of said net demand or excess capacity and generate command signals responsively to said detecting, the controller being configured to store data representing a time rate of change of said net demand or excess capacity;the control system being programmed to predict, responsively to the stored data representing a time rate of change of said net demand or excess capacity and further data that represents a model of the grid, a future schedule of electrical power demand and supply of the grid and to control, responsively to said stored data,a rate of storage or delivery to or from the first storage component and to or from the second storage component where the rate and quantity of electrical power to store or deliver from the first storage component and the second storage component are independent of each other; anda rate of supply from the first and second power generation elements.56. The system according to claim 55 , wherein the first power ...

ALTERNATIVE ENERGY BUS BAR BY PASS BREAKER

The present invention is directed, in part, to electrical components and methods of use associated with such components. In particular, the invention relates to an electrical device and improved method of back feeding energy generated from alternative energy devices such as solar panels, wind turbines, fuel cells, electrical generators and other alternative energy sources, to the utility without the necessity of installing a sub panel or replacing an existing panel, resulting in significant cost savings for the user and increased electrical energy available to the power grid. The invention further discloses installation of a back feed circuit breaker into an existing main panel and main circuit breaker thus, eliminating the need of a home owner to completely reinstall a new electrical system in order to install alternative energy sources such as for example, solar panels and the like. 1. A method of installing a back feed circuit breaker into an existing main service panel wherein said installation comprises the steps of first connecting said back feed circuit breaker into said existing main service panel to form a circuit wherein said main service panel comprises a main circuit breaker and one or more bus bars wherein , said back feed circuit breaker is connected in parallel tap with said main circuit breaker wherein , said back feed circuit breaker is installed between a utility power grid and said main circuit breaker to form a circuit wherein , said back feed circuit breaker is also connected to an alternative energy source , wherein said alternative energy source generates electricity , said electricity comprising backfed power , wherein said alternative energy source delivers said backfed power to said back feed circuit breaker wherein , said backfed power is then delivered by said back feed circuit breaker to said utility power grid wherein , said backfed power bypasses said one or more bus bars and said bus bars do not form any portion of a circuit formed by ...