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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 3. Отображено 3.
05-03-2014 дата публикации

Breaker failure protection blocking method

Номер: CN103618296A
Автор: QIU JINHUI, YU YOU, JIA SONGJIANG, ZHU XINGYONG, TIAN JINGFU, QIAN HAI, ZHANG GUANGJIA
Принадлежит:

The invention discloses a breaker failure protection blocking method which is used for solving the technical problem that when a circuit branch breaks down, failure voltage blocking constant value sensitivity does not exist in bus breaker failure protection. The breaker failure protection blocking method comprises the following steps that a bus protection device is used for calculating the scalar value and the scalar sum of zero sequence currents of all circuit branches and monitoring the failure opening state of the circuit branches, and as for the circuit branches with failure starting connection points being conducted, a zero sequence current threshold value and a zero sequence rate criterion judgment are met, three continuous sampling points are met, and a breaker failure protection blocking component is opened. Compared with the prior art, the breaker failure protection blocking method has the advantages that judging is carried out according to the relation among the zero sequence ...

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Номер записи: 1
25-03-2015 дата публикации

Intelligent processing method capable of protecting operation report of two ends of circuit in online management system

Номер: CN104467190A
Автор: QIAN HAI, QIU JINHUI, JIA SONGJIANG, JIANG JIANLIN
Принадлежит:

The invention relates to an intelligent processing method capable of protecting the operation report of the two ends of a circuit in an online management system. The online management system comprises a main station and multiple substations. The method comprises the steps that the substations send a message to the main station; the main station judges whether the message is relevant to the circuit; if the message is relevant to the circuit, the main station judges whether the message is a line fault event in a power grid and generates the two-end operation report if yes, and the process is ended if not; if the message is irrelevant to the circuit, the main station processes the message. By the adoption of the method, fault messages generated by relevant protective recorder devices in transformer substations at the two ends of a fault line can be automatically converted into a complete two-end operation report more accurately and reliably after the power grid line fails.

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Номер записи: 2
01-08-2023 дата публикации

Polar region equipment reliability analysis method based on weighted sampling method

Номер: CN116522700A
Автор: LIU ZHIJIE, JIA SONGJIANG, SUN YUHANG, WANG XIAOBANG
Принадлежит:

The invention discloses a polar region equipment reliability analysis method based on a weighted sampling method. The method comprises the following steps: establishing an input factor calculation model based on material mechanical properties, environmental load and working load; according to the upper and lower limit values of the input factors, determining a simulation scheme by using a Latin hypercube sampling method, carrying out a finite element simulation experiment, and constructing a Kriging agent model; performing weighted sampling on each input factor, permutation and combination on the level and weight of each factor, calculating a predicted value and a combination probability by adopting a Kriging agent model, and calculating reliability by adopting a weighted sampling method; the method can effectively calculate the reliability of the polar region equipment under a certain condition and time, and meets the reliability design requirements of the polar region equipment.

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Номер записи: 3