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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 6. Отображено 6.
15-06-2011 дата публикации

Method for realizing point-to-point distributed bus protection by adopting multi-level cascading

Номер: CN0102097790A
Автор: ZHIGUO TANG, SIMAN WANG, XINZHI CHEN, QUAN DING, JINBO LAN, PINYONG YE, TANG ZHIGUO, WANG SIMAN, CHEN XINZHI, DING QUAN, LAN JINBO, YE PINYONG
Принадлежит:

The invention discloses a method for realizing point-to-point distributed bus protection by adopting multi-level cascading. The method comprises the step of adopting the architecture of host plus submachine to realize bus protection. The method has the following advantages: protection application of the host is relatively fixed; whether the host adopts the traditional interval or digitization interval is no longer distinguished and whether the host has the switching value in the GOOSE (generic object oriented event) interface mode or the traditional switching value is no longer distinguished, and the host always works in the SMV (sampled measured value) and GOOSE interface modes; and besides, the connection intervals of the bus are increased or decreased by only configuring different numbers of submachines, and the configuration mode is changed by applying modules with different functions to the submachines.

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Номер записи: 1
25-04-2012 дата публикации

Differential protection method for preventing false operation during current disappearance

Номер: CN0101662143B
Автор: LAN JINBO, QIAN GUOMING, DAI JING, YAO LIANG, WEI YAO, CHEN QI, JINBO LAN, GUOMING QIAN, JING DAI, LIANG YAO, YAO WEI, QI CHEN
Принадлежит:

The invention relates to a differential protection method for preventing false operation during current disappearandce, which comprises the following steps: preparing to trip according to the differential protection action after a protection device starts for 60ms; then, using a waveform similarity criterion to compute waveform similarity coefficients computed in a short window data of a differential action element 20ms before; if the waveform similarity coefficient values in the data window are all less than 0.2, tripping immediately; and if the condition that the waveform similarity coefficient values in the data window are greater than 0.2 exists, delaying differential protection for 20ms, and triggering port if the fault does not disappear. The method is based on a least square filtering principle, compares whether a target alternating quantity is the normal system waveform or distorted waveform according to the waveform similarity coefficients, and does not differentiate the fault ...

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Номер записи: 2
10-03-2010 дата публикации

Fault localization method suitable for three-terminal T connection electric transmission line

Номер: CN0101666847A
Автор: ZHANG YONGGANG, XUE MINGJUN, ZHU JIANHONG, YAO LIANG, LAN JINBO, YONGGANG ZHANG, MINGJUN XUE, JIANHONG ZHU, LIANG YAO, JINBO LAN
Принадлежит:

The invention discloses a fault localization method suitable for a three-terminal T connection electric transmission line, comprising the following steps: firstly, judging the running state of the three-terminal electric transmission line: if the line is in a three-terminal running mode, firstly identifying a fault branch line, and calculating the fault distance according to the electric quantityof both ends of a T connection point and the endpoint of the fault branch line; if the line is in a two-terminal running mode or one side branch line is in a three-terminal running mode in a hot standby state, firstly determining if a fault point is at a switch cut-off branch line or not, if so, adopting a single-terminal localization method to calculate the distance from the T connection point tothe fault point, thereby obtaining the fault distance from the endpoint of the branch line to the fault point; but if the fault point is not at the switch cut-off branch line, respectively carrying out ...

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Номер записи: 3
13-07-2011 дата публикации

Protective device starting component for double A/D sampling of electronic transformer in digital substation

Номер: CN0102122811A
Автор: YAO WEI, GUOMING QIAN, JINBO LAN, WEI YAO, QIAN GUOMING, LAN JINBO
Принадлежит:

The invention discloses a protective device starting component for double A/D sampling of an electronic transformer in a digital substation. The component is characterized in that an A/D sampling loop 1 is connected with a sampling value processing module 1 and then discriminates the action of a protection starting component and computes a protection function component; an A/D sampling loop 2 is connected with a sampling value processing module 2 and then discriminates the action of a repeated sampling starting component; and a device exit loop is allowed to open when the action signals of the protection starting component and the repeated sampling starting component act simultaneously, and at the same time, when the protection function component acts, the action exit signal of the device is output. By the method, the protective device can be effectively prevented from carrying out faulty action when one of the input double A/D data is abnormal.

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Номер записи: 4
17-08-2011 дата публикации

File self-repair downloading method for embedded type multi-machine system

Номер: CN0102158304A
Автор: XINZHI CHEN, JIEQING DENG, PINYONG YE, QUAN DING, LIANG YAO, JINBO LAN, HUAWU YU, JIANGONG WEI, CHEN XINZHI, DENG JIEQING, YE PINYONG, DING QUAN, YAO LIANG, LAN JINBO, YU HUAWU, WEI JIANGONG
Принадлежит:

The invention discloses a file self-repair downloading method for an embedded type multi-machine system. After a CPU (central processing unit) module is linked with a mainframe preposed module, the interaction of internal information in the multi-machine system is realized through 'routing bytes', 'forwarding marks' and 'target port slogans'. The CPU module is used for performing CRC (cyclic redundancy check), downloading and solidification on an FPGA (field-programmable gate array) program, an application program and a configuration file respectively, and a mode of return verification per frame is adopted during the transmission process, so that if a confirmation message is not received, the confirmation message is automatically re-sent; and if the sending of the confirmation message fails for a plurality of times, relevant warning information is prompted. After completing the check, the downloading and the solidification on three parts, namely the FPGA configuration program, the application ...

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Номер записи: 5
03-03-2010 дата публикации

Differential protection method for preventing false operation during current disappearance

Номер: CN0101662143A
Автор: LAN JINBO, QIAN GUOMING, DAI JING, YAO LIANG, WEI YAO, CHEN QI, JINBO LAN, GUOMING QIAN, JING DAI, LIANG YAO, YAO WEI, QI CHEN
Принадлежит:

The invention relates to a differential protection method for preventing false operation during current disappearandce, which comprises the following steps: preparing to trip according to the differential protection action after a protection device starts for 60ms; then, using a waveform similarity criterion to compute waveform similarity coefficients computed in a short window data of a differential action element 20ms before; if the waveform similarity coefficient values in the data window are all less than 0.2, tripping immediately; and if the condition that the waveform similarity coefficient values in the data window are greater than 0.2 exists, delaying differential protection for 20ms, and triggering port if the fault does not disappear. The method is based on a least square filtering principle, compares whether a target alternating quantity is the normal system waveform or distorted waveform according to the waveform similarity coefficients, and does not differentiate the faultstarting ...

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Номер записи: 6