Настройки

Укажите год
-

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

Подробнее
-

Мониторинг СМИ

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

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год
Применить Всего найдено 6. Отображено 6.
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 ...

Подробнее
Номер записи: 1
16-05-2023 дата публикации

High-voltage transmission line fault identification method and device for realizing method

Номер: CN116125187A
Автор: TIAN PENGFEI, YU YOU, TIAN JINGFU, NING XINCAI, QU JING, DONG MING, WANG XU, GU YUE, BAO PENGYU, HU PO, JIANG ZHIYUN, WU GUODING, ZHANG TIANDONG
Принадлежит:

The invention discloses a high-voltage transmission line fault identification method, and the method comprises the steps: firstly, carrying out the learning of two-dimensional time series data through employing a CNN model, and employing the powerful feature extraction capability of the CNN model, thereby solving a problem that a feature extraction method is too complex; secondly, a segmentation identification method is provided, that is to say, aiming at the problems that the high-voltage line phase-to-phase fault identification accuracy is low and the high-voltage line phase-to-phase fault identification is difficult to distinguish, the high-voltage transmission line fault is effectively identified by judging whether the phase-to-phase fault is grounded through the phase-to-phase current difference and the negative sequence and zero sequence components of the non-fault phase and by using the SVM on the basis of adopting the CNN to preliminarily judge the fault type. Compared with the ...

Подробнее
Номер записи: 2
04-04-2023 дата публикации

Power distribution network protection method and device based on fault time self-synchronization and fault component similarity

Номер: CN115912297A
Автор: YU YOU, TIAN JINGFU, LIU ZHENDONG, YANG FEI, QIAN HAI, MA QIANG, TIAN PENGFEI, WANG GANG, XI QINGZHE, QU FUDI
Принадлежит:

The invention discloses a power distribution network pilot protection method and device based on a fault time self-synchronization technology and fault component similarity characteristics, and provides a fault time self-synchronization technology by considering the influence of ground capacitance current and combining the KCL law, so as to eliminate the influence of asynchronous errors on the fault component similarity characteristics of positive sequence current at the two ends of a line, and improve the reliability of the power distribution network pilot protection. And self-synchronization of positive sequence current at two ends of the line is realized. In order to improve the anti-interference performance of the transition resistor, the fault component is used for constructing a protection criterion, according to the fault component similarity characteristics which are almost the same as the external fault in normal operation and are obviously different from the internal fault, the ...

Подробнее
Номер записи: 3
15-08-2023 дата публикации

Automobile swing door assembly and automobile thereof

Номер: CN116587817A
Автор: WU MINGWEI, LEI BO, ZHANG XUEHAI, TIAN JINGFU
Принадлежит:

The invention discloses an automobile swing door assembly which comprises a lower swing door assembly body, the lower swing door assembly body comprises a first mounting base, a second mounting base and a fourth mounting base, the two ends of the fourth mounting base are hinged to a first connecting arm and a third connecting arm respectively, and a driving device for driving the first connecting arm to rotate is further mounted on the first mounting base; the lower swing door assembly is fixedly connected to an automobile body through the first installation base and the second installation base. The upper swing door assembly comprises a third mounting seat and a fifth mounting seat, the third mounting seat is hinged to the tail of an electric telescopic rod, and the top of the electric telescopic rod is hinged to the fifth mounting seat. According to the swing door assembly, when a front door and a rear door of an automobile door are oppositely opened, disordered opening of the front door ...

Подробнее
Номер записи: 4
07-04-2023 дата публикации

Admission condition determination method for new energy station grid connection in T connection mode

Номер: CN115940270A
Автор: ZHANG WUYANG, YANG FEI, LIU MENGXIA, YAN ZHENHONG, TIAN JINGFU, TAO YU, QIAN HAI, MA QIANG, LI JIANFENG, WANG TONG, ZHANG ZHAO, YU TONGWEI, SUN GANG, SHI BONIAN
Принадлежит:

The invention belongs to the technical field of new energy power generation grid connection, and particularly relates to an access condition determination method for grid connection of a new energy station in a T connection mode. The method comprises the following steps: step 1, acquiring basic parameters of a new energy sending-out tie line; 2, preliminarily checking whether the new energy station meets T-connection grid connection requirements or not by adopting a mathematical method of sequential comparison and judgment on the basis of the parameters and the standards; and step 3, further judging whether the voltage and broadband stability of the connected power grid system after the new energy T-connection grid connection meet requirements or not, and finally determining the admission condition of the new energy field station in the T-connection mode grid connection. According to the method, the access condition of the new energy station in T-connection grid connection can be quickly ...

Подробнее
Номер записи: 5
11-04-2023 дата публикации

Power distribution network pilot protection method and device based on positive sequence current similarity characteristics

Номер: CN115954841A
Автор: QU FUDI, LIU ZHENDONG, TIAN JINGFU, YU YOU, YANG FEI, TIAN PENGFEI, MA QIANG, QIAN HAI, WANG GANG, XI QINGZHE
Принадлежит:

The invention discloses a power distribution network pilot protection method and device based on positive sequence current similarity characteristics, and the method comprises the steps: forming a feature vector through the positive sequence current at two ends of a line during normal operation, and reflecting the fault characteristics of an external fault after the maximum and minimum normalization processing; the single-class classification algorithm takes normal operation data as a training set, is matched with a positive sequence current self-synchronization technology considering a certain error, fully extracts comprehensive fault features such as amplitude and phase angle of positive sequence current, obtains classification boundaries of external faults and internal faults in a high-dimensional space, further considers the influence of a transient process, and improves the fault classification accuracy. The criterion threshold value of the power distribution network pilot protection ...

Подробнее
Номер записи: 6