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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 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 4. Отображено 4.
24-06-2015 дата публикации

Wind power plant equating method based on low voltage ride through period control strategy

Номер: CN104732008A
Автор: HOU JUNXIAN, NA ZHIQIANG, SUN WEIZHEN, WAN LEI, NI QIULONG, WANG YI, ZHANG JING, DONG YIFENG, YE LIN, WANG HONGFU, WANG CHAO, YANG YING, SHI BOLONG, DU SAN'EN, FENG JING
Принадлежит:

The invention provides a wind power plant equating method based on a low voltage ride through period control strategy. The method comprises the following steps that an active current control value and a reactive current control value of a wind generator set are calculated; the sum of actual active current control values of a wind power plant and the sum of actual reactive current control values of the wind power plant are calculated; the sum of equivalent active current control values of the wind power plant and the sum of equivalent reactive current control values of the wind power plant are calculated; the final equivalent unit number of the wind generator set is determined. The wind power plant equating method based on the low voltage ride through period control strategy is based on a scalar multiplication method, and is a method for equating the wind power plant to a plurality of units which are completely the same and determining the reasonable number of the equivalent units, and the ...

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Номер записи: 1
23-06-2023 дата публикации

Power grid transient stability quantitative evaluation method based on voltage phasor trajectory fitting

Номер: CN116316870A
Автор: LIU DAOWEI, MA HAIBIN, ZHAO GAOSHANG, YANG HONGYING, YANG XUETAO, SONG DUNWEN, XIE JIAZHENG, DU SAN'EN, CHEN YONG, XU PENGFEI, LIU KAIXIN, FENG YIXIAN, FENG JING
Принадлежит:

The invention discloses a power grid transient stability quantitative evaluation method based on voltage phasor trajectory fitting. The method comprises the steps that real-time measurement information of each generator in a power grid is acquired in real time from a power grid wide-area measurement system; respectively calculating the change rates of the angle values of each generator at the previous moment and the next moment, and determining the generator with the maximum change rate in all generators as a stable unit and the generator with the minimum change rate as an unstable unit; calculating equivalent mechanical power and equivalent electromagnetic power of the unstable unit according to the real-time measurement information of the stable unit and the real-time measurement information of the unstable unit; and calculating a transient stability evaluation index of the power grid according to the equivalent mechanical power and the equivalent electromagnetic power, and determining ...

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Номер записи: 2
25-07-2023 дата публикации

Power grid static stability dominant mode identification method based on voltage phasor trajectory

Номер: CN116488194A
Автор: GAO SHEN, ZHAO GAOSHANG, LIU DAOWEI, LI BAIQING, YANG HONGYING, SONG DUNWEN, YANG XUETAO, DU SAN'EN, CHEN YONG, XU PENGFEI, LIU KAIXIN, FENG YIXIAN, FENG JING, XIE JIAZHENG, XIAO XIANGTAO
Принадлежит:

The invention discloses a power grid static and stable dominant mode identification method based on a voltage phasor trajectory, and the method comprises the steps: calculating the equivalent parameters of nodes of a whole network based on input wide-area measurement data; generating an equivalent two-node power grid parameter model based on the whole network node equivalent parameters; calculating a node voltage phasor trajectory based on the equivalent two-node power grid parameter model; based on the node voltage phasor trajectory, trajectory sensitivity of the node voltage phasor is calculated; determining a static stability dominant mode identification criterion based on the trajectory sensitivity of the node voltage phasor; and determining dominant states at different moments and dominant demarcation points of the dominant states in the dynamic evolution process of the power grid according to the static stable dominant mode identification criterion and the node voltage phasor trajectory ...

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Номер записи: 3
23-04-2014 дата публикации

Enterprise power grid motor group starting method based on self-adaption theory

Номер: CN103746613A
Автор: YANG QI, TANG XIAOJUN, ZHANG ZHIQIANG, LI XIAOJUN, LI YUANYUAN, SONG YUNTING, DU SAN'EN, QIU LIPING
Принадлежит:

The invention relates to an enterprise power grid motor group starting method based on self-adaption theory. On the basis of the characteristic of change of surge currents and busbar voltages when a motor starts, by analyzing different impact performances of different motors on the power grid, and taking factors, such as enterprise power grid production technology process constraint, power grid running status changes, motor itself low-voltage tripping protection, motor upstream transformer capacity restriction and enterprise power grid relay protection configuration and the like into consideration comprehensively, a scientific and reasonable motor group starting strategy is made. By adopting the starting method in the invention, the problem of larger-range power failure due to upstream switch tripping which is caused by mechanical and unordered starting in a conventional starting method is overcome; the enterprise power grid motor group starting method provides powerful support for motor ...

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Номер записи: 4