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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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Применить Всего найдено 9. Отображено 9.
26-05-2023 дата публикации

Distribution network line automation benefit evaluation method and related device

Номер: CN116167893A
Принадлежит:

The invention discloses a distribution network line automatic benefit evaluation method and a related device. The method comprises the steps of obtaining fault data and operation data of a distribution network line in a to-be-evaluated time period and taking the fault data and the operation data as an evaluation data set; calculating the fault processing benefit of distribution network automation according to the number of normal power supply users and the total number of line users in the evaluation data set; calculating the running operation benefit of the distribution network automation according to the remote control operation success times and the line operation times in the evaluation data set; and combining the fault processing benefit and the operation benefit to determine the distribution network automation benefit. Compared with a conventional method for evaluating the automation benefit of the distribution network through the power failure time, the method is more objective, ...

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08-08-2023 дата публикации

Distribution network line fault transfer capacity calculation method and system

Номер: CN116565855A
Принадлежит:

The invention relates to the technical field of line fault maintenance, and discloses a distribution network line fault transfer capacity calculation method and a distribution network line fault transfer capacity calculation system. Judging whether the line section capable of being transferred is a heavy-load line section or not according to a load redundancy value between any two towers in the line section capable of being transferred, recording the heavy-load line section as a line section capable of being transferred, and calculating the proportion of the user load number of all the line sections capable of being transferred to the user load number of all the line sections. According to the method, the distribution network line fault transfer capacity is calculated, the corresponding proportions of the fault points in all the line sections are calculated, the maximum proportion is determined, and the transfer capacity value of the feeder line is determined according to the maximum proportion ...

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18-04-2023 дата публикации

Crawler-type coal cleaning machine

Номер: CN115977673A
Принадлежит:

The invention discloses a crawler-type coal cleaning machine, which belongs to the technical field of underground mine passage cleaning, and comprises a rack, a coal collecting device arranged at the lower part of one side of the rack, a coal lifting device obliquely arranged on the rack and used for bearing the coal collecting device, and a power device arranged on the rack and used for driving the coal collecting device and the coal lifting device, a chain scraper conveyor used for bearing the coal lifting device is further arranged on the rack; a walking device used for driving the rack to move is arranged on the lower side of the rack. The coal powder feeding device can automatically collect and feed coal powder in a coal mine tunnel and convey the coal powder to a belt, is simple to operate and convenient to use, and can greatly strengthen the labor intensity of workers, improve the working efficiency and save the cost.

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12-05-2023 дата публикации

Distribution network automation switch position distribution generation method and device and storage medium

Номер: CN116109108A
Принадлежит:

The invention relates to the technical field of electric power, and discloses a distribution network automation switch position distribution generation method and device and a storage medium. According to the invention, a scheme that each section switch is configured at each target tower on a main line under the existing condition is enumerated; calculating a user load loss expected value of each target segment under each scheme based on the fault probability, the load and the number of middle and low voltage users among the target towers on the main line; calculating the variance of a target sample formed by the user load loss expected values of the corresponding target segments under each scheme, and selecting the scheme with the minimum variance from the schemes meeting a preset expected value condition as an optimal scheme; and if no scheme meets the preset expected value condition, determining an optimal scheme by adding a branch switch in a branch line and adding a distribution network ...

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14-04-2023 дата публикации

Distribution network automation terminal relay protection value setting method and system

Номер: CN115967071A
Принадлежит:

The invention relates to the technical field of relay protection setting, and discloses a distribution network automation terminal relay protection setting value setting method and system, and the method comprises the steps: selecting an interconnection switch in a power distribution network, obtaining all distribution network automation switches with three-remote functions between a 10kV feeder line outgoing switch and the interconnection switch, and carrying out the combination, a plurality of grading switch preselection schemes are formed, the user load number of each grading switch preselection scheme and the variance of the user load number are subjected to weighted calculation, and the grading switch preselection scheme with the minimum weighted value is selected from weighted results to serve as a grading switch setting scheme; the overcurrent protection constant value time of each step switch is obtained according to the preset overcurrent protection time margin and the number of ...

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11-08-2023 дата публикации

Distribution network line fault self-recovery method and system

Номер: CN116581749A
Принадлежит:

The invention relates to the technical field of line fault self-healing, and discloses a distribution network line fault self-healing method and system, and the method comprises the steps: designing a distribution network line, configuring the line load distribution of each line segment of a feeder line, and configuring the fixed values of overcurrent and zero-sequence protection actions corresponding to a hierarchical distribution network automation switch and an interconnection switch, the distribution network automatic switch is used for positioning the range of a fault point sending a line fault signal, isolating a fault line section, and switching power supply for a non-fault line section according to line load rate conditions on two sides of the distribution network automatic switch and the interconnection switch so as to realize self-healing of a fault line. Therefore, the load rate of the line and the transfer capacity of the surrounding lines are comprehensively considered, the ...

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23-06-2023 дата публикации

Power distribution network cable section fault risk evaluation method and device and storage medium

Номер: CN116307705A
Принадлежит:

The invention relates to the technical field of power system risk analysis, and discloses a power distribution network cable section fault risk evaluation method and device and a storage medium. The method comprises the following steps: acquiring operation data of a target feeder since commissioning and fault influence data of a target line section of the target feeder, and calculating the fault probability of the target feeder according to the number of accumulated faults and the number of accumulated operation days in the operation data to obtain the overall fault probability of the target; calculating the fault probability of the corresponding target line segment according to the target overall fault probability to obtain a target segment fault probability; calculating a fault consequence influence value of the corresponding target line section according to the number of middle and low voltage users in the fault influence data and the last-year data values of all loads; and calculating ...

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11-04-2023 дата публикации

Distribution network automation terminal remote control abnormity analysis method and related device

Номер: CN115955414A
Принадлежит:

The invention discloses a distribution network automation terminal remote control abnormity analysis method and a related device. The method comprises the following steps: acquiring remote control operation data and communication message data of a distribution network automation switch in a to-be-analyzed time period, and taking the data as an analysis data set; respectively calculating a remote control abnormal rate, a communication abnormal rate, a preset abnormal rate, a protocol abnormal rate and a message abnormal rate of the distribution network automation switch based on the analysis data set; according to the remote control abnormal rate, the communication abnormal rate, the preset abnormal rate, the protocol abnormal rate and the message abnormal rate, calculating the remote control abnormal probability of the distribution network automation switch through an entropy method; judging whether any preset sudden abnormal condition of the distribution network automation switch occurs ...

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09-05-2023 дата публикации

Distribution network line interconnection switch distribution point selection method and device and storage medium

Номер: CN116093940A
Принадлежит:

The invention relates to the technical field of power distribution network optimization, and discloses a distribution network line interconnection switch distribution point selection method and device and a storage medium. A target power supply scheme set is determined according to a trunk line set of a target substation; taking a tower and cable tapping point as a target endpoint, taking a line segment between two adjacent target endpoints as a corresponding target line segment, and calculating load redundant data corresponding to different schemes in the power supply scheme set to determine a distribution point selection range of the interconnection switch on the distribution network line; performing point distribution in the point distribution selection range according to the number of the target interconnection switches to obtain each alternative point distribution scheme; and calculating the line minimum redundancy of different feeder switch sides under each alternative point distribution ...

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