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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 4. Отображено 4.
23-05-2023 дата публикации

Simplified analysis method and system for fault current of low-frequency power transmission system

Номер: CN116148589A
Автор: XIANG NIANWEN, YE SHOUHONG, WANG SHULAI, LU YI, QIU PENG, LIN JINDIAN, HAN BIN, ZHAO GUOLIANG, QIAO GUANGYAO, ZHAO ZEXIN, NI XIAOJUN, DING CHAO, NI JIAWEI, KE YIFAN
Принадлежит:

The invention provides a low-frequency power transmission system fault current simplified analysis method and system, and belongs to the technical field of power system fault protection. Comprising the following steps: detecting a normally operating system, and obtaining element inherent parameters and normal operating parameters of the system; the evolution process of the fault current is divided into three stages: capacitor charging before the current converter is locked, capacitor discharging before the current converter is locked, and capacitor charging after the current converter is locked; the fault loops of the three stages are equivalent to RLC equivalent circuits, the RLC equivalent circuits derive fault current analytic expressions, and the fault current analytic expressions are synthesized to obtain the fault current analytic expressions. According to the method, complicated modeling simulation is not needed, simplified analytic calculation of the three-phase earth fault current ...

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Номер записи: 1
30-05-2023 дата публикации

Grid connection method for high-frequency collection and low-frequency transmission of direct-driven wind power plant

Номер: CN116191551A
Автор: SHAO BINGBING, WANG SHULAI, XIANG NIANWEN, HUANG XIAOYAO, YE SHOUHONG, WANG KAIJUN, KE YIFAN, HUANG XIAOMING, NI JIAWEI, LI KEJIE
Принадлежит:

The invention discloses a grid-connected method for high-frequency collection and low-frequency transmission of a direct-driven wind power plant. The grid-connected method comprises the following steps: 1, establishing a control structure of a wind turbine generator set side current converter and a grid side current converter in a high-frequency collection system of the direct-driven wind power plant; 2, establishing a control structure of M3C converters at the sending end and the receiving end of the low-frequency sending-out system; and 3, obtaining the optimal frequencies of the high-frequency collection system and the low-frequency transmission system considering the resource utilization rate and the stability. A new direct-drive wind power plant grid connection mode can be established, the size of the alternating-current transformer is reduced through the high-frequency collection system, the transmission power can be improved and the voltage loss can be reduced through the low-frequency ...

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Номер записи: 2
23-06-2023 дата публикации

Direct lightning trip-out rate calculation method of current collection line influenced by wind driven generator

Номер: CN116298608A
Автор: XIANG NIANWEN, DU YUCHEN, LV ZENGWEI, LI ZHAOKUN, KE YIFAN, QIN CHENGCHENG, TIAN PENGKUN, TAN YONGXU, WU YEXIN, LI KEJIE, LI LONGLONG, YUAN QIANKUN, WEI DINGSHENG, WANG LINGFENG, YE SHOUHONG, ZHANG YONGCHUN, YANG CHUN, YANG CUILING, NI ZHENG'AO
Принадлежит:

The invention discloses a direct lightning trip-out rate calculation method of a current collection circuit influenced by a wind driven generator, and belongs to the field of lightning protection of the current collection circuit of a wind power plant. The calculation method comprises the following steps: firstly, acquiring relevant parameters of a wind power plant current collection line and a geographic position of a wind driven generator, then dividing a line section and a lightning current amplitude interval, comparing a line back flashover resistance level and a shielding failure current interval with a lightning current amplitude, calculating a line back flashover trip-out rate and a shielding failure trip-out rate, and finally calculating the wind power plant current collection line back flashover trip-out rate according to the calculated line back flashover trip-out rate. The line direct lightning trip-out rate is corrected according to the overlapping area of the lightning stroke ...

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Номер записи: 3
09-05-2023 дата публикации

Long-gap discharge observation device and method based on concave mirror schlieren system

Номер: CN116087709A
Автор: WANG CHAOQUN, XIANG NIANWEN, LI KEJIE, HUANG SHENGXIN, LV ZENGWEI, YE SHOUHONG, LEI JIAHUA, SUN DIAN
Принадлежит:

The invention discloses a long-gap discharge observation device and method based on a concave mirror schlieren system, and belongs to a high-temporal-spatial-resolution quantitative schlieren diagnosis system for long air gap discharge thermodynamic parameter diagnosis. The device comprises a discharge test part and a schlieren observation part, wherein the discharge test part comprises an impulse voltage generator, a rod electrode, a discharge channel and a grounding plate; the schlieren observation part comprises a laser light source, a first reflector, a first concave mirror, a second concave mirror, a second reflector, a knife edge, a high-speed camera and an oscilloscope. Aiming at the problems related to thermodynamic parameter observation and discharge physical characteristic research in long air gap discharge, a schlieren observation platform formed by using a concave mirror as a main device is utilized to carry out long air gap discharge characteristic research, so that the thermodynamic ...

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Номер записи: 4