Power-flow current breaking capacity test synthetic circuit synchronous control device and method

A technique of interrupting ability and synthesizing loop, which is applied in the field of synchronous control device for synthetic loop of power frequency freewheeling interrupting ability test, can solve problems such as insufficient synchronous time control accuracy, achieve reduction of equivalent plane area, improve time control accuracy, improve Effects on operational reliability and safety

Pending Publication Date: 2017-03-22
STATE GRID CORP OF CHINA +3
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, because it uses different discharge distances to control the discharge time, it is easily affected by factors such as air humidity, atmospheric pressure, and electrode shape. At the same time, due to the discrete nature of air gap discharge, the synchronization time control accuracy is not enough.

Method used

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  • Power-flow current breaking capacity test synthetic circuit synchronous control device and method
  • Power-flow current breaking capacity test synthetic circuit synchronous control device and method
  • Power-flow current breaking capacity test synthetic circuit synchronous control device and method

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Embodiment Construction

[0039] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

[0040] Please refer to figure 1 One of the embodiments of the synthetic circuit synchronous control device for power frequency freewheeling interruption ability test of the present invention includes a power frequency oscillation circuit connected in sequence, a power frequency oscillation start detection unit 10, a trigger phase control unit 20, a photoelectric conversion and an ignition unit 30, the The power frequency oscillation circuit includes a power frequency oscillation starting circuit breaker K1, a power frequency oscillation capacitor C, and a power frequency oscillation inductance L connected in series.

[0041] Using the present invention to conduct a power frequency freewheeling interruption capability test on the test product 40, firstly close the power frequency oscillation start circui...

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Abstract

The invention provides a power-flow current breaking capacity test synthetic circuit synchronous control device and method. The device comprises a power frequency oscillation circuit as well as a power frequency oscillation startup detection unit, a trigger phase control unit and a photoelectric conversion and ignition unit connected in sequence. The device and the method can avoid the problem of time delay caused by detecting a switch-on contact or circuit current signal, improve the accuracy of time control, reduce electromagnetic coupling interference of self circuit, effectively avoid spatial electromagnetic coupling interference and conducted interference intrusion of a power supply line, ensure safe and reliable operation of the circuit, effectively avoid false triggering accidents caused by high-current electromagnetic interference at the moment of power frequency startup and shock ignition of a system and strong electromagnetic pulse spatial coupling, and improve the running reliability and safety of the system.

Description

technical field [0001] The invention relates to the technical field of electric power system lightning protection, in particular to a synchronous control device and method for a synthesis circuit of a power frequency freewheeling interruption capability test. Background technique [0002] Developed countries have carried out long-term research on the power frequency continuous current interruption capability test of power line arresters. At present, a large-scale test device for testing the power frequency continuous current interruption capability of line arresters has been developed. The device integrates lightning impulse and power frequency power supply to simulate The actual working condition of the line arrester in the hanging network operation is struck by lightning, but its synchronous control method is realized by controlling the closing and opening of the circuit breaker through a single-chip microcomputer or PLC control system, which costs a lot of money and occupi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327
CPCG01R31/3272
Inventor 姚尧傅景伟沈煜周学明杨志淳阮羚沈海滨雷挺熊宇邱凌戴兵
Owner STATE GRID CORP OF CHINA
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