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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 48. Отображено 48.
28-03-2013 дата публикации

SYSTEMS AND METHODS FOR USE IN GRID FAULT EVENT CONTROL

Номер: US20130077367A1
Принадлежит:

System, power modules, and methods for supplying an output voltage to an electric grid are provided. One example power module includes a switching device configured to supply an output from a power generator to an electric grid, a feedback unit configured to provide a feedback signal indicative of a deviation of a parameter associated with the electric grid, and a controller coupled to the feedback unit and the switching device. The controller is configured to adjust a reactive current of the output in response to at least one grid fault event to ride through the at least one grid fault event, to modify the deviation provided from the feedback unit, to control the switching device based on the modified deviation, and to detect an islanding condition based on the parameter associated with the electric grid. 1. A power module for use in interfacing a power generator to an electric grid , said power module comprising:a switching device configured to supply an output from a power generator to an electric grid;a feedback unit configured to provide a feedback signal indicative of a deviation of a parameter associated with the electric grid; and,a controller coupled to said feedback unit and said switching device, said controller configured to adjust a reactive current of the output in response to at least one grid fault event to ride through the at least one grid fault event, to modify the deviation provided from said feedback unit, to control said switching device based on the modified deviation, and to detect an islanding condition based on the parameter associated with the electric grid.2. The power module of claim 1 , wherein said controller is configured to amplify the deviation provided from said feedback unit.3. The power module of claim 1 , wherein said controller is configured to drive claim 1 , based on the modified deviation claim 1 , the parameter associated with the electric grid away from a nominal value during the islanding condition.4. The power module of ...

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15-03-2012 дата публикации

SYSTEM AND METHOD FOR DAMPING LC CIRCUITS IN POWER CONVERSION SYSTEMS

Номер: US20120063179A1
Принадлежит:

A power conversion system comprises a power converter comprising a plurality of semiconductor power switches, an LC filter coupled between an output of the power converter and an electric grid, and a power conversion control system. The LC filter comprises an inductor coupled in series to the electric grid, and a capacitor. The LC filter and the grid result in an equivalent LC circuit comprising an impedance of the LC filter and an impedance of the electric grid. The power conversion control system comprises a damper and a converter controller. The damper receives an LC filter signal and an equivalent LC circuit impedance signal and generates a damping signal. The converter controller receives a current or voltage reference signal, a current or voltage command signal, and the damping signal to generate control signals for driving switching operations of the semiconductor power switches. 1. A power conversion system comprising:a power converter comprising a plurality of semiconductor power switches;an LC filter coupled between an output of the power converter and an electric grid, the LC filter comprising an inductor coupled in series to the electric grid, and a capacitor, wherein the LC filter and the grid result in an equivalent LC circuit comprising an impedance of the LC filter and an impedance of the electric grid; and a damper to receive an LC filter signal and an equivalent LC circuit impedance signal, and to generate a damping signal; and', 'a converter controller to receive a current or voltage reference signal, a current or voltage command signal, and the damping signal to generate control signals for driving switching operations of the semiconductor power switches., 'a power conversion control system comprising2. The power conversion system of claim 1 , wherein the LC filter signal comprises a current signal of the capacitor in the LC filter claim 1 , and the damping signal comprises a voltage damping signal or a current damping signal.3. The power ...

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03-10-2023 дата публикации

Cone holder

Номер: US00D1000034S1
Автор: Xueqin Wu
Принадлежит: Xueqin Wu

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10-04-2018 дата публикации

Comb polymer, method of preparing the same, and use thereof

Номер: US0009938445B2

The present disclosure discloses a comb polymer or a salt thereof, wherein the structural formula of the comb polymer containing the following constitutional units. When the comb polymer provided in the present disclosure is used in a water-based drilling fluid as a filtration control agent, it can eliminate the defects of conventional filtration control agents which would be subject to ineffectiveness under high temperature and high salinity conditions. The comb polymer has high temperature and salt resistance, and can be produced through simple processes at comparatively low costs. When the comb polymer provided by the present disclosure is used as a filtration control agent, even being added into the drilling fluid at a comparatively low amount, it can still present rather good effects in lowering the amount of filter loss.

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29-11-2016 дата публикации

Power converter system, damping system, and method of operating a power converter system

Номер: US0009509231B2

A power converter system includes a converter configured to be coupled to a power generation unit for receiving current from the power generation unit. A bus is coupled to the converter, and energy is stored within the bus when the current is conducted through the power converter system. A damping circuit is configured to be coupled to the bus and to the power generation unit, and a control system is coupled to the converter and to the damping circuit. The control system is configured to selectively discharge at least a portion of the energy stored within the bus through the damping circuit when the control system determines that a predetermined condition is met.

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22-04-2014 дата публикации

Power conversion system and method for converting DC power at a DC bus into AC power

Номер: US0008705256B2

Embodiments of the invention relate to a power system for converting direct current (DC) power on a DC bus into alternating current (AC) power with a regulated voltage output and for feeding the AC power to an electrical system which may include a power utility or an electric grid, for example. A power conversion control system is used for controlling the power conversion and for maintaining the DC bus voltage (DC voltage) at a certain level.

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31-01-2013 дата публикации

MAXIMUM POWER POINT TRACKING FOR POWER CONVERSION SYSTEM AND METHOD THEREOF

Номер: US20130027997A1
Принадлежит:

An exemplary power conversion system comprises an MPPT unit, a DC bus, a power converter, and a converter controller. The MPPT unit receives a feedback current signal and a feedback voltage signal from a power source and generates an MPPT reference signal based at least in part on the feedback current and voltage signals. The DC bus receives DC power from the power source. The power converter converts the DC power on the DC bus to AC power. The converter controller receives the MPPT reference signal from the MPPT unit and an output power feedback signal measured at an output of the power converter; generates control signals for AC power regulation and maximum power extraction based at least in part on the MPPT reference signal and the output power feedback signal; and sends the control signals to the power converter. 1. A power conversion system comprising:a maximum power point tracking (MPPT) unit for receiving a feedback current signal and a feedback voltage signal from a power source and generating an MPPT reference signal based at least in part on the feedback current signal and the feedback voltage signal;a DC bus for receiving DC power from the power source;a power converter for converting the DC power on the DC bus to alternating current (AC) power; and receiving the MPPT reference signal from the MPPT unit and an output power feedback signal measured at an output of the power converter;', 'generating control signals for AC power regulation and maximum power extraction based at least in part on the MPPT reference signal and the output power feedback signal; and', 'sending the control signals to the power converter., 'a converter controller for2. The power conversion system of claim 1 , wherein the power converter comprises a line side converter for converting the DC power on the DC bus to the AC power; and wherein the converter controller comprises a line side controller for generating an internal frequency command signal based at least in part on the MPPT ...

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10-04-2018 дата публикации

Methods for operating wind turbine system having dynamic brake

Номер: US0009941687B2
Принадлежит: General Electric Company, GEN ELECTRIC

Methods for operating a wind turbine system are provided. In one embodiment, a method includes adjusting a threshold direct current (DC) bus voltage for a dynamic brake in a wind turbine power converter above a reference DC bus voltage based on at least one system condition. The method further includes gating the dynamic brake on when an experienced DC bus voltage is equal to or greater than the threshold DC bus voltage, and inputting a dynamic brake condition into a controller when the dynamic brake is gated on. The method further includes determining if a grid fault has occurred, reducing power generation of the wind turbine if no grid fault has occurred, and blocking the power converter if a grid fault has occurred. The method further includes gating the dynamic brake off when the experienced DC bus voltage is less than the threshold DC bus voltage.

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20-10-2015 дата публикации

Power decoupling controller and method for power conversion system

Номер: US0009166500B2

A power conversion system is disclosed including a DC bus for receiving DC power, a power converter for converting the DC power to AC power, and a controller. The controller includes an active power regulator for generating a phase angle command signal, a reactive power regulator for generating a voltage magnitude command, and an active power (P) and reactive power (Q) decoupling unit for decoupling interaction between the active and reactive power regulators. The PQ decoupling unit includes an active power compensation element and a reactive power compensation element. The active power compensation element is used for generating a phase angle compensation signal based on a reactive power error signal, to compensate the phase angle command signal. The reactive power compensation element is used for generating a voltage magnitude compensation signal based on an active power error signal, to compensate the voltage magnitude command signal.

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31-01-2013 дата публикации

POWER CONVERSION SYSTEM WITH TRANSIENT EVENT RIDE-THROUGH CAPABILITY AND METHOD THEREOF

Номер: US20130027993A1
Принадлежит:

An exemplary power conversion system is disclosed including a DC bus for receiving DC power; a line side converter electrically coupled to the DC bus for converting the DC power to AC power; and a voltage source controller to provide control signals to enable the line side converter to regulate the AC power. The voltage source controller comprises a signal generator to generate the control signals based at least in part on a power command signal and a power feedback signal. The voltage source controller further comprises a current limiter to, during a transient event, limit the control signals based at least in part on an electrical current threshold. The voltage source controller further comprises a voltage limiter to, during the transient event, limit the control signals based at least in part on a DC bus voltage feedback signal and a DC boundary voltage threshold. 1. A power conversion system , comprising:a DC bus for receiving direct current (DC) power;a line side converter coupled to the DC bus for converting the DC power on the DC bus to alternating current (AC) power; and a signal generator to generate the control signals for the line side converter based at least in part on a power command signal and a power feedback signal;', 'a current limiter to, during a transient event, limit the control signals based at least in part on an electrical current threshold; and', 'a voltage limiter for limiting the control signals based at least in part on a DC bus voltage feedback signal and a DC boundary voltage threshold during the transient event., 'a voltage source controller for providing control signals to the line side converter to enable the line side converter to regulate the AC power, the voltage source controller comprising2. The power conversion system of claim 1 , wherein the power conversion system further comprises a maximum power point tracking (MPPT) device for generating an MPPT power reference signal claim 1 , wherein the voltage source controller ...

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10-12-2019 дата публикации

System and method for supplying power to at least one load

Номер: US0010505468B2
Принадлежит: General Electric Company, GEN ELECTRIC

It is a system for supplying power to at least one load. The system comprises at least one power source, load bank and control device coupled to the at least one load. The load bank is coupled to at least one power source and at least one load. The load bank comprises a controllable voltage source, at least three resistors coupled between an output side of the controllable voltage source and the at least one power source, and at least one storage element. The controllable voltage source comprises more than one switches. And the at least one storage element comprises one or more capacitors, batteries, or combinations thereof. The control device is configured for controlling the switches during a first condition such that, to the extent that an output power of the at least one power source exceeds a requisite power of the at least one load, any excess output power is either supplied to the at least one storage element or consumed by the at least three resistors. This invention also provides ...

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17-09-2015 дата публикации

SYSTEM AND METHOD FOR DETECTING ISLANDING OF ELECTRICAL MACHINES AND PROTECTING SAME

Номер: US20150263508A1
Принадлежит:

In one aspect, a method for protecting one or more electrical machines during an islanding event is provided. The method includes connecting one or more electrical machines to an alternating current (AC) electric power system, wherein the AC electric power system is configured to transmit at least one phase of electrical power to the one or more electrical machines or to receive at least on phase of electrical power from the one or more electrical machines; electrically coupling at least a portion of a control system to at least a portion of the AC electric power system; coupling at least a portion of the control system in electronic data communication with at least a portion of the one or more electrical machines; and detecting an islanding of the one or more electrical machines based on one or more conditions monitored by the control system. 1. A method of protecting one or more electrical machines during an islanding event , said method comprising:(a) receiving a first indicator of an islanding of one or more electrical machines;(b) determining, by a computing device, whether the received first indicator is determinative of islanding of the one or more electrical machines;(c) if the computing device determines that the received first indicator is determinative of islanding of the one or more electrical machines, then sending one or more signals by the computing device to protect the one or more electrical machines;(d) if the computing device determines that the received first indicator is not determinative of islanding of the one or more electrical machines, then receiving one or more additional condition indicators;(e) determining, by the computing device, whether the one or more additional condition indicators are determinative of islanding of the one or more electrical machines;(f) if the computing device determines that the one or more additional condition indicators are determinative of islanding of the one or more electrical machines, then sending the one ...

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28-04-2016 дата публикации

METHODS FOR OPERATING WIND TURBINE SYSTEM HAVING DYNAMIC BRAKE

Номер: US20160118786A1
Принадлежит:

Methods for operating a wind turbine system are provided. In one embodiment, a method includes adjusting a threshold direct current (DC) bus voltage for a dynamic brake in a wind turbine power converter above a reference DC bus voltage based on at least one system condition. The method further includes gating the dynamic brake on when an experienced DC bus voltage is equal to or greater than the threshold DC bus voltage, and inputting a dynamic brake condition into a controller when the dynamic brake is gated on. The method further includes determining if a grid fault has occurred, reducing power generation of the wind turbine if no grid fault has occurred, and blocking the power converter if a grid fault has occurred. The method further includes gating the dynamic brake off when the experienced DC bus voltage is less than the threshold DC bus voltage. 1. A method for operating a wind turbine system , the method comprising:adjusting a threshold direct current (DC) bus voltage for a dynamic brake in a wind turbine power converter above a reference DC bus voltage based on at least one system condition;gating the dynamic brake on when an experienced DC bus voltage is equal to or greater than the threshold DC bus voltage;inputting a dynamic brake condition into a controller when the dynamic brake is gated on;determining if a grid fault has occurred;reducing power generation of the wind turbine if no grid fault has occurred;blocking the power converter if a grid fault has occurred; andgating the dynamic brake off when the experienced DC bus voltage is less than the threshold DC bus voltage.2. The method of claim 1 , wherein the step of reducing power generation comprises pitching at least one rotor blade of the wind turbine.3. The method of claim 1 , wherein the step of blocking the power converter comprises gating off at least one of a line side switch or a rotor side switch.4. The method of claim 1 , wherein the grid fault comprises at least one of an open grid ...

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09-10-2014 дата публикации

Systems and Methods for Use in Recovering a Converter After Grid Fault Event

Номер: US20140301120A1
Принадлежит: General Electric Company

Systems, power modules (), and methods () for using in controlling a converter () coupled between a power generator () and an electric grid () are provided. One of the power modules () includes the converter () configured to supply an output from the power generator () to the electric grid (), and a controller () coupled to the converter (). The controller () includes a phase-lock-loop (PLL) module () and at least one regulator (). The at least one regulator () is configured to at least partially control the converter () as a function of at least one parameter. The controller () is configured to disable the converter () in response to a grid fault event, to maintain coupling between the power generator () and the converter () during the grid fault event, to determine whether the PLL module () is locked onto a voltage associated with the electric grid, to adjust the at least one parameter after the grid fault event, and to re-enable the converter to supply the output from the power generator () to the electric grid (). 1. A power module for use in controlling a converter coupled between a power generator and an electric grid , said power module comprising:a converter configured to supply an output from a power generator to an electric grid; and,a controller coupled to said converter and comprising a phase-lock-loop (PLL) module and at least one regulator, said at least one regulator configured to at least partially control said converter as a function of at least one parameter, said controller configured to disable said converter in response to a grid fault event, to maintain coupling between the power generator and said converter during the grid fault event, to determine said PLL module is locked onto a voltage associated with the electric grid, to adjust the at least one parameter after the grid fault event, and, to re-enable said converter to supply the output from the power generator to the electric grid.2. The power module of claim 1 , wherein the parameter ...

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13-12-2012 дата публикации

POWER CONVERSION SYSTEM AND METHOD

Номер: US20120314467A1
Принадлежит:

Embodiments of the invention relate to a power system for converting direct current (“DC”) power on a DC bus into alternating current (“AC”) power with a regulated voltage output and for feeding the AC power to an electrical system which may include a power utility or an electric grid, for example. A power conversion control system is used for controlling the power conversion and for maintaining the DC bus voltage (“DC voltage”) at a certain level. 1. A power system comprising;a power source;a DC bus for receiving DC power from the power source;a line side converter electrically coupled to the DC bus for converting the DC power from the DC bus to AC power with a regulated voltage output to feed an electrical system; and receive a voltage amplitude signal representative of the regulated voltage output;', 'obtain a DC voltage difference signal using a DC voltage feedback signal of the DC bus and a DC voltage command signal;', 'obtain a power command signal;', 'obtain a power feedback signal;', 'use the DC voltage difference signal, the power command signal, and the power feedback signal to generate a phase angle control signal; and', 'generate a control signal for the line side converter using the voltage amplitude signal and the phase angle control signal., 'a power conversion control system comprising a line side controller for controlling operation of the line side converter and configured to2. The power system of claim 1 , wherein the power source comprises a power limit.3. The power system of claim 2 , wherein the power source comprises a solar power source claim 2 , and wherein the power system further comprises a maximum power point tracking circuit for tracking a maximum power of the power source.4. The system of claim 3 , wherein the power command signal comprises the maximum power from the maximum power point tracking circuit.5. The system of claim 1 , wherein the line side controller comprises a regulator for receiving the DC voltage difference signal to ...

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27-02-2014 дата публикации

POWER GENERATION SYSTEM, POWER CONVERTER SYSTEM, AND METHODS OF OPERATING A POWER CONVERTER SYSTEM

Номер: US20140056041A1
Принадлежит: GENERAL ELECTRIC COMPANY

A power converter system includes a converter configured to be coupled to a power generation unit for receiving power from the power generation unit, and a bus coupled to the converter, wherein a voltage is generated across the bus when electricity is conducted through the power converter system. The power converter system also includes an inverter coupled to the bus, wherein the inverter is configured to supply power to an electrical distribution network. A control system is coupled to at least one of the converter and the inverter, wherein the control system is configured to adjust an operation of the at least one of the converter and the inverter to reduce the voltage across the bus during at least one of a low voltage event and a high voltage event. 1. A power converter system comprising:a converter configured to be coupled to a power generation unit for receiving power from the power generation unit;a bus coupled to the converter, wherein a voltage is generated across the bus when electricity is conducted through the power converter system;an inverter coupled to the bus and configured to supply power to an electrical distribution network; and,a control system coupled to at least one of the converter and the inverter, the control system configured to adjust an operation of the at least one of the converter and the inverter to reduce the voltage across the bus during at least one of a low voltage event and a high voltage event.2. The power converter system in accordance with claim 1 , wherein the control system is configured to operate the converter to reduce the power received from the power generation unit during the at least one of a low voltage event and a high voltage event.3. The power converter system in accordance with claim 1 , wherein the inverter comprises at least one switch claim 1 , the control system is configured to disable the at least one switch during the at least one of a low voltage event and a high voltage event.4. The power converter system ...

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17-03-2015 дата публикации

Maximum power point tracking for power conversion system and method thereof

Номер: US0008982592B2

An exemplary power conversion system comprises an MPPT unit, a DC bus, a power converter, and a converter controller. The MPPT unit receives a feedback current signal and a feedback voltage signal from a power source and generates an MPPT reference signal based at least in part on the feedback current and voltage signals. The DC bus receives DC power from the power source. The power converter converts the DC power on the DC bus to AC power. The converter controller receives the MPPT reference signal from the MPPT unit and an output power feedback signal measured at an output of the power converter; generates control signals for AC power regulation and maximum power extraction based at least in part on the MPPT reference signal and the output power feedback signal; and sends the control signals to the power converter.

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30-09-2014 дата публикации

Power conversion system with transient event ride-through capability and method thereof

Номер: US0008848404B2

An exemplary power conversion system is disclosed including a DC bus for receiving DC power; a line side converter electrically coupled to the DC bus for converting the DC power to AC power; and a voltage source controller to provide control signals to enable the line side converter to regulate the AC power. The voltage source controller comprises a signal generator to generate the control signals based at least in part on a power command signal and a power feedback signal. The voltage source controller further comprises a current limiter to, during a transient event, limit the control signals based at least in part on an electrical current threshold. The voltage source controller further comprises a voltage limiter to, during the transient event, limit the control signals based at least in part on a DC bus voltage feedback signal and a DC boundary voltage threshold.

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23-10-2012 дата публикации

System and method for damping LC circuits in power conversion systems

Номер: US0008295063B2

A power conversion system comprises a power converter comprising a plurality of semiconductor power switches, an LC filter coupled between an output of the power converter and an electric grid, and a power conversion control system. The LC filter comprises an inductor coupled in series to the electric grid, and a capacitor. The LC filter and the grid result in an equivalent LC circuit comprising an impedance of the LC filter and an impedance of the electric grid. The power conversion control system comprises a damper and a converter controller. The damper receives an LC filter signal and an equivalent LC circuit impedance signal and generates a damping signal. The converter controller receives a current or voltage reference signal, a current or voltage command signal, and the damping signal to generate control signals for driving switching operations of the semiconductor power switches.

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28-06-2016 дата публикации

Systems and methods for use in recovering a converter after grid fault event

Номер: US0009379602B2

Systems, power modules ( 108 ), and methods ( 200 ) for using in controlling a converter ( 110 ) coupled between a power generator ( 104 ) and an electric grid ( 102 ) are provided. One of the power modules ( 108 ) includes the converter ( 110 ) configured to supply an output from the power generator ( 104 ) to the electric grid ( 102 ), and a controller ( 112 ) coupled to the converter ( 110 ). The controller ( 112 ) includes a phase-lock-loop (PLL) module ( 123 ) and at least one regulator ( 128, 130 ). The at least one regulator ( 128, 130 ) is configured to at least partially control the converter ( 110 ) as a function of at least one parameter. The controller ( 112 ) is configured to disable the converter ( 110 ) in response to a grid fault event, to maintain coupling between the power generator ( 104 ) and the converter ( 110 ) during the grid fault event, to determine whether the PLL module ( 123 ) is locked onto a voltage associated with the electric grid, to adjust the at least one parameter after the grid fault event, and to re-enable the converter to supply the output from the power generator ( 104 ) to the electric grid ( 102 ).

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16-04-2015 дата публикации

POWER CONVERTER SYSTEM, DAMPING SYSTEM, AND METHOD OF OPERATING A POWER CONVERTER SYSTEM

Номер: US20150103573A1
Принадлежит: General Electric Company

A power converter system includes a converter configured to be coupled to a power generation unit for receiving current from the power generation unit. A bus is coupled to the converter, and energy is stored within the bus when the current is conducted through the power converter system. A damping circuit is configured to be coupled to the bus and to the power generation unit, and a control system is coupled to the converter and to the damping circuit. The control system is configured to selectively discharge at least a portion of the energy stored within the bus through the damping circuit when the control system determines that a predetermined condition is met. 1. A power converter system comprising:a converter configured to be coupled to a power generation unit for receiving current from the power generation unit;a bus coupled to said converter, wherein energy is stored within said bus when the current is conducted through said power converter system;a damping circuit configured to be coupled to said bus and to the power generation unit; and,a control system coupled to said converter and to said damping circuit, said control system configured to selectively discharge at least a portion of the energy stored within said bus through said damping circuit when said control system determines that a predetermined condition is met.2. A power converter system in accordance with claim 1 , wherein said control system determines that the predetermined condition is met when at least one of a voltage across said bus exceeds a predetermined threshold and the voltage across said bus is expected to exceed the predetermined threshold.3. A power converter system in accordance with claim 1 , wherein said damping circuit comprises a resistor coupled to said bus.4. A power converter system in accordance with claim 3 , wherein said damping circuit further comprises a protection device configured to enable current to be received from the power generation unit when current is prevented ...

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10-01-2023 дата публикации

Box

Номер: US000D974905S1
Автор: Xueqin Wu
Принадлежит: Xueqin Wu

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23-07-2015 дата публикации

Comb polymer, method of preparing the same, and use thereof

Номер: US20150203736A1
Принадлежит:

The present disclosure discloses a comb polymer or a salt thereof, wherein the structural formula of the comb polymer containing the following constitutional units. 2. The comb polymer according to claim 1 , wherein the viscosity average molecular weight of the comb polymer is in the range from 10 claim 1 ,000 to 500 claim 1 ,000 claim 1 , preferably 10 claim 1 ,000 to 200 claim 1 ,000.3. The comb polymer according to claim 1 , wherein R-Rand R-R claim 1 , identical to or different from one another respectively claim 1 , can be independently selected from a group consisting of hydrogen and C-Calkyls;{'sub': '7', 'wherein Ris selected from a group consisting of hydrogen and alkyl sulfonic acids each containing 1 to 4 carbon atoms; and'}{'sub': 8', '1', '4, 'wherein Ris selected from a group consisting of hydrogen, C-Calkyls, and carboxylic acids each containing 1 to 4 carbon atoms, with m being an integer in the range from 10 to 110,'}{'sub': 2', '3', '5', '6', '9', '10', '1', '4', '8', '7, 'preferably, R, R, R, R, R, and Rall being hydrogen, and R, R, R, identical to or different from one another, being selected from a group consisting of hydrogen and methyl, and Rbeing selected from a group consisting of hydrogen and methylpropane sulfonic acid.'}4. A method for preparing the comb polymer or the salt thereof according to claim 1 , comprising the steps of:mixing an aqueous solution of a first reactant, a second reactant, and a third reactant with an emulsifier and a nonpolar dispersion medium; andperforming inverse emulsion polymerization in the presence of an initiator and an optional catalyst,wherein the first reactant, the second reactant, and the third reactant are respectively an unsaturated acid, an unsaturated amide or a derivative thereof, and an unsaturated acid ester.5. The method according to claim 4 , wherein the molar ratio of the first reactant to the second reactant to the third reactant is in the range from (20-50):(9-49):(1-60).6. The method ...

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16-10-2014 дата публикации

POWER DECOUPLING CONTROLLER AND METHOD FOR POWER CONVERSION SYSTEM

Номер: US20140307494A1
Принадлежит: GENERAL ELECTRIC COMPANY

A power conversion system is disclosed including a DC bus for receiving DC power, a power converter for converting the DC power to AC power, and a controller. The controller includes an active power regulator for generating a phase angle command signal, a reactive power regulator for generating a voltage magnitude command, and an active power (P) and reactive power (Q) decoupling unit for decoupling interaction between the active and reactive power regulators. The PQ decoupling unit includes an active power compensation element and a reactive power compensation element. The active power compensation element is used for generating a phase angle compensation signal based on a reactive power error signal, to compensate the phase angle command signal. The reactive power compensation element is used for generating a voltage magnitude compensation signal based on an active power error signal, to compensate the voltage magnitude command signal. 1. A power conversion system comprising:a direct current (DC) bus for receiving DC power from a power source;a power converter for converting the DC power on the DC bus to alternating current (AC) power; and an active power regulator for generating a phase angle command signal based on an active power command signal and an active power feedback signal;', 'a reactive power regulator for generating a voltage magnitude command signal based on a reactive power command signal and a reactive power feedback signal; and', an active power compensation element for generating a phase angle compensation signal based on a reactive power error signal, to compensate the phase angle command signal; and', 'a reactive power compensation element for generating a voltage magnitude compensation signal based on an active power error signal, to compensate the voltage magnitude command signal., 'an active power (P) and reactive power (Q) decoupling unit for decoupling interaction between the active power regulator and the reactive power regulator, the PQ ...

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29-10-2015 дата публикации

SYSTEM AND METHOD FOR PROTECTING ELECTRICAL MACHINES

Номер: US20150311696A1
Принадлежит: GENERAL ELECTRIC COMPANY

In one aspect, a method for protecting one or more electrical machines during a grid fault on an electrical system connected with the one or more electrical machines is provided. The method includes detecting a grid fault on an electrical system; taking one or more first actions from a first set of actions based on detected grid fault on the electrical system; detecting at least one operating condition of the electrical system after taking one or more first actions from the first set of actions based on the detected grid fault on the electrical system; and taking one or more second actions from a second set of actions based on the detected at least one operating condition of the electrical system. 1. A method of protecting one or more electrical machines during a grid fault on an electrical system connected with the one or more electrical machines , said method comprising:detecting a grid fault on an electrical system, wherein detecting the grid fault on the electrical system comprises detecting whether the grid fault comprises a high voltage event or another grid fault event;taking one or more first actions from a first set of actions based on the detected grid fault on the electrical system;detecting at least one operating condition of the electrical system after taking one or more first actions from the first set of actions based on the detected grid fault on the electrical system; andtaking one or more second actions from a second set of actions based on the detected at least one operating condition of the electrical system.2. The method of claim 1 , wherein detecting a grid fault on an electrical system comprises detecting one or more of an opening of one or more phases of the electrical system claim 1 , an islanding of at least one of the one or more electrical machines from the electrical system claim 1 , a low voltage on the electrical system claim 1 , a high voltage on the electrical system claim 1 , or a zero voltage on the electrical system.3. The method ...

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07-12-2017 дата публикации

System and method for supplying power to at least one load

Номер: US20170353123A1
Принадлежит: General Electric Co

It is a system for supplying power to at least one load. The system comprises at least one power source, load bank and control device coupled to the at least one load. The load bank is coupled to at least one power source and at least one load. The load bank comprises a controllable voltage source, at least three resistors coupled between an output side of the controllable voltage source and the at least one power source, and at least one storage element. The controllable voltage source comprises more than one switches. And the at least one storage element comprises one or more capacitors, batteries, or combinations thereof. The control device is configured for controlling the switches during a first condition such that, to the extent that an output power of the at least one power source exceeds a requisite power of the at least one load, any excess output power is either supplied to the at least one storage element or consumed by the at least three resistors. This invention also provides a method for supplying power to at least one load.

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03-11-2011 дата публикации

System and method for damping LC circuits in power conversion systems

Номер: AU2011201678A1
Принадлежит: General Electric Co

SYSTEM AND METHOD FOR DAMPING LC CIRCUITS IN POWER CONVERSION SYSTEMS A power conversion system comprises a power converter comprising a plurality of semiconductor power switches, an LC filter coupled between an output of the power converter and an electric grid, and a power conversion control system. The LC filter comprises an inductor coupled in series to the electric grid, and a capacitor. The LC filter and the grid result in an equivalent LC circuit comprising an impedance of the LC filter and an impedance of the electric grid. The power conversion control system comprises a damper and a converter controller. The damper receives an LC filter signal and an equivalent LC circuit impedance signal and generates a damping signal. The converter controller receives a current or voltage reference signal, a current or voltage command signal, and the damping signal to generate control signals for driving switching operations of the semiconductor power switches.

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11-03-2015 дата публикации

System and method for damping lc circuits in power conversion systems

Номер: EP2395651A3
Принадлежит: General Electric Co

A power conversion system (16) comprises a power converter (22) comprising a plurality of semiconductor power switches (23), an LC filter (24) coupled between an output of the power converter and an electric grid (20), and a power conversion control system (26). The LC filter comprises an inductor coupled in series to the electric grid, and a capacitor (C f ). The LC filter and the grid result in an equivalent LC circuit comprising an impedance of the LC filter and an impedance of the electric grid. The power conversion control system comprises a damper (32, 78) and a converter controller (66, 84). The damper receives an LC filter signal and an equivalent LC circuit impedance signal and generates a damping signal (40, 80). The converter controller receives a current or voltage reference signal, a current or voltage command signal, and the damping signal to generate control signals for driving switching operations of the semiconductor power switches.

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27-03-2020 дата публикации

Follow-on MBR sewage plant

Номер: CN210193614U

本实用新型公开了污水处理技术领域一种改进型的MBR污水装置,包括调节池、厌氧池、膜生物反应池、污泥池、清水池、鼓风机和清水泵,膜生物反应池内设置有膜生物过滤器,鼓风机对膜生物过滤器底部进行曝气,清水泵将膜生物过滤器内经过处理的水输送至清水池,调节池上的进水口通过一级过滤机构将污水输送至调节池内,膜生物过滤器可往复运动,膜生物反应池内设置有位于膜生物过滤器上方将污水中的污渍输送至污泥池的二级过滤机构。本实用新型通过往复机构带动膜生物反应器本体往复运动,避免在曝气速度较低时污渍堵塞膜生物反应器本体表面。

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07-03-2018 дата публикации

Methods for operating wind turbine system having dynamic brake

Номер: EP3004637B1
Принадлежит: General Electric Co

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11-10-2014 дата публикации

Power decoupling controller and method for power conversion system

Номер: CA2848107A1
Принадлежит: General Electric Co

A power conversion system is disclosed including a DC bus for receiving DC power, a power converter for converting the DC power to AC power, and a controller. The controller includes an active power regulator for generating a phase angle command signal, a reactive power regulator for generating a voltage magnitude command, and an active power (P) and reactive power (Q) decoupling unit for decoupling interaction between the active and reactive power regulators. The PQ decoupling unit includes an active power compensation element and a reactive power compensation element. The active power compensation element is used for generating a phase angle compensation signal based on a reactive power error signal, to compensate the phase angle command signal. The reactive power compensation element is used for generating a voltage magnitude compensation signal based on an active power error signal, to compensate the voltage magnitude command signal.

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06-03-2014 дата публикации

System and method for protecting electrical machines

Номер: CA2883369A1
Принадлежит: General Electric Co

A system and method for protecting one or more electrical machines during a grid fault on an electrical system connected with the one or more electrical machines. The method includes detecting the grid fault on the electrical system(402); taking one or more first actions from a first set of actions based on the detected grid fault on the electrical system(404); detecting at least one operating condition of the electrical system after taking one or more first actions from the first set of actions based on the detected grid fault on the electrical system(406); and taking one or more second actions from a second set of actions based on the detected at least one operating condition of the electrical system(408).

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06-11-2018 дата публикации

Systems and methods for using in recovering converter after grid fault event

Номер: CA2851961C
Принадлежит: General Electric Co

Systems, power modules (108), and methods (200) for using in controlling a converter (110) coupled between a power generator (104) and an electric grid (102) are provided. One of the power modules (108) includes the converter (110) configured to supply an output from the power generator (104) to the electric grid (102), and a controller (112) coupled to the converter (110). The controller (112) includes a phase-lock-loop (PLL) module (123) and at least one regulator (128, 130). The at least one regulator (128, 130) is configured to at least partially control the converter (110) as a function of at least one parameter. The controller (112) is configured to disable the converter (110) in response to a grid fault event, to maintain coupling between the power generator (104) and the converter (110) during the grid fault event, to determine whether the PLL module (123) is locked onto a voltage associated with the electric grid, to adjust the at least one parameter after the grid fault event, and to re-enable the converter to supply the output from the power generator (104) to the electric grid (102).

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07-09-2016 дата публикации

Power conversion system with transient event ride-through capability and method thereof

Номер: EP2552007A3
Принадлежит: General Electric Co

A power conversion system is disclosed including a DC bus for receiving DC power; a line side converter electrically coupled to the DC bus for converting the DC power to AC power; and a voltage source controller to provide control signals to enable the line side converter to regulate the AC power. The voltage source controller comprises a signal generator to generate the control signals based at least in part on a power command signal and a power feedback signal. The voltage source controller further comprises a current limiter to, during a transient event, limit the control signals based at least in part on an electrical current threshold. The voltage source controller further comprises a voltage limiter to, during the transient event, limit the control signals based at least in part on a DC bus voltage feedback signal and a DC boundary voltage threshold.

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08-03-2016 дата публикации

Microemulsion completion fluid and use thereof.

Номер: NL2014039B1

The present disclosure discloses a microemulsion completion fluid, comprising an oil phase, an aqueous phase, a surfactant, a cosurfactant, a salt, and a cleaning agent, wherein the cleaning agent is selected from a group consisting of oxidants and bio-enzymes. The microemulsion completion fluid according to the present disclosure has excellent comprehensive performance, and is advantageous in relieving formation damage caused by a drilling fluid, especially by a water-based drilling fluid, so as to improve yield of crude oil in production. The completion fluid according to the present disclosure has broad application prospects.

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30-05-2013 дата публикации

Systems and methods for use in controlling a converter in response to grid fault events

Номер: WO2013075291A1
Принадлежит: GENERAL ELECTRIC COMPANY

- Systems, power modules, and methods for use in interfacing a power generator to an electric grid are provided. One example power module includes a converter configured to couple to the electric grid. The converter has an input configured to receive an input voltage from the power generator. The power module further includes an energy storage device coupled across the input of the converter and a controller coupled to the converter. The controller is configured to establish at least one current path through the converter, in response to a grid fault event, to inhibit power flow from the electric grid to the energy storage device.

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04-07-2016 дата публикации

Plugging material and drilling fluid additive and method of application thereof.

Номер: NL2013996B1

A plugging material according to the present disclosure comprises nano-silica and sepiolite. A weight ratio ofnano-silica to sepiolite is 4-5:1-2. The present disclosure further provides an oil base drilling fluid additive comprising plugging material of 1-3 parts by mass, emulsifying agent of 0.5-2 parts by mass, wetting agent of 0.5-2 parts by mass, and calcium chloride aqueous solution of 0.1-1 part by mass. The present disclosure further provides a method for improving the plugging property of a drilling fluid by using the oil base drilling fluid additive comprising: adding said plugging material, emulsifying agent, wetting agent, and the calcium chloride aqueous solution into the oil base drilling fluid, and stirring the mixture for emulsification, thereby improving the plugging property of the drilling fluid.

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08-07-2015 дата публикации

System and method for detecting islanding of electrical machines and protecting same

Номер: EP2891224A1
Принадлежит: General Electric Co

In one aspect, a method for protecting one or more electrical machines during an islanding event is provided. The method includes connecting one or more electrical machines to an alternating current (AC) electric power system, wherein the AC electric power system is configured to transmit at least one phase of electrical power to the one or more electrical machines or to receive at least on phase of electrical power from the one or more electrical machines; electrically coupling at least a portion of a control system to at least a portion of the AC electric power system; coupling at least a portion of the control system in electronic data communication with at least a portion of the one or more electrical machines; and detecting an islanding of the one or more electrical machines based on one or more conditions monitored by the control system.

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18-10-2017 дата публикации

Controllable three-phase dump-load and storage combination for power balancing

Номер: EP3231052A1
Принадлежит: General Electric Co

It is a system for supplying power to at least one load. The system comprises at least one power source, load bank and control device coupled to the at least one load. The load bank is coupled to at least one power source and at least one load. The load bank comprises a controllable voltage source, at least three resistors coupled between an output side of the controllable voltage source and the at least one power source, and at least one storage element. The controllable voltage source comprises more than one switches. And the at least one storage element comprises one or more capacitors, batteries, or combinations thereof. The control device is configured for controlling the switches during a first condition such that, to the extent that an output power of the at least one power source exceeds a requisite power of the at least one load, any excess output power is either supplied to the at least one storage element or consumed by the at least three resistors. This invention also provides a method for supplying power to at least one load.

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23-06-2021 дата публикации

Controllable three-phase dump-load and storage combination for power balancing

Номер: EP3231052B1
Принадлежит: General Electric Co

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16-06-2016 дата публикации

Controllable three-phase dump-load and storage combination for power balancing

Номер: WO2016094747A1
Принадлежит: GENERAL ELECTRIC COMPANY

It is a system for supplying power to at least one load. The system comprises at least one power source, load bank and control device coupled to the at least one load. The load bank is coupled to at least one power source and at least one load. The load bank comprises a controllable voltage source, at least three resistors coupled between an output side of the controllable voltage source and the at least one power source, and at least one storage element. The controllable voltage source comprises more than one switches. And the at least one storage element comprises one or more capacitors, batteries, or combinations thereof. The control device is configured for controlling the switches during a first condition such that, to the extent that an output power of the at least one power source exceeds a requisite power of the at least one load, any excess output power is either supplied to the at least one storage element or consumed by the at least three resistors. This invention also provides a method for supplying power to at least one load.

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03-09-2014 дата публикации

Systems and methods for using in identifying and responding to type of grid fault event

Номер: EP2771955A1
Принадлежит: General Electric Co

Systems (100), power modules (108), and methods for using in controlling a converter (110) coupled between a power generator (104) and an electric grid (102). A power module (108) includes the converter (110) configured to supply the output from the power generator (104) to the electric grid (102) and a controller (112) coupled to the converter (110) and configured to disable the converter (110) in response to a grid fault event, to identify the type or the grid fault event after a first predetermined interval from disabling the converter (110), and to enable switching of the converter (110), when the type of the grid fault event is identified as a low voltage condition.

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27-03-2020 дата публикации

一种垃圾渗滤液膜浓缩液零排放处理装置

Номер: CN210193561U

本实用新型涉及垃圾渗滤液处理技术领域,具体为一种垃圾渗滤液膜浓缩液零排放处理装置,包括箱体、电机、转盘、摆动摇杆、滑轨、振动槽和控制面板,箱体左右两侧外壁均设置有电机,电机动力输出端穿过箱体侧壁且延伸至内部,转盘固定连接于电机动力输出端上,转盘内端面上设置有圆柱销,摆动摇杆分别设置于箱体左右两侧内壁,摆动摇杆由摆杆和扇形齿轮构成,摆杆位于扇形齿轮上方,摆杆底端固定连接于扇形齿轮顶端,扇形齿轮转动连接于箱体内侧壁,滑轨设置于摆动摇杆下方,滑轨分别固定连接于箱体左右两侧内壁,振动槽左右两侧设置有导向滑块,导向滑块分别滑动连接于两侧滑轨内,本实用新型提供了一种垃圾渗滤液膜浓缩液零排放处理装置。

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27-03-2020 дата публикации

一种mbr污水处理用预处理装置

Номер: CN210193558U

本实用新型公开了污水处理技术领域的一种MBR污水处理用预处理装置,包括可封闭的预处理水池,预处理水池的顶部设置有呈人字形分布的杂物排泄管和污水过滤管,杂物排泄管的顶端与污水过滤管的侧壁上端连通,污水过滤管的上侧部中部连通有竖立设置的污水注入管,污水过滤管的顶端为封闭结构并安装有减速电机,减速电机的输出端伸入污水过滤管的内腔、并连接有过滤蛟龙,预处理水池的右侧设置有用于精确观测预处理水池内部液面高度的液面观测装置,预处理水池的底部右侧设置有排水管道,预处理水池的内腔底部倾斜设置有细格栅滤网,细格栅滤网的右侧高于排水管道的内侧出水口,本实用新型提供了一种MBR污水处理用预处理装置。

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15-10-2024 дата публикации

Monitor

Номер: USD1046859S1
Автор: Xueqin Wu
Принадлежит: Individual

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