Early warning method and equipment for secondary circuit fault of relay protection device

A relay protection device and secondary circuit fault technology, which is applied in the field of early warning of secondary circuit faults of relay protection devices, can solve the problems of poor detection ability of intermittent hidden faults in the secondary circuit, etc., so as to eliminate hidden dangers and maintain The effect of safe operation

Active Publication Date: 2017-07-14
STATE GRID CORP OF CHINA +2
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  • Abstract
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Problems solved by technology

[0006] Aiming at the defect in the prior art that the ability to detect intermittent hidden faults of the secondary circuit is po

Method used

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  • Early warning method and equipment for secondary circuit fault of relay protection device
  • Early warning method and equipment for secondary circuit fault of relay protection device
  • Early warning method and equipment for secondary circuit fault of relay protection device

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[0027] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the present invention. Invented some embodiments, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0028] The embodiment of the present invention uses the fault recording file of the microcomputer protection device to identify the intermittent hidden fault of the secondary circuit. The secondary circuit may refer to the secondary measurement circuit of the relay protection device of the transformer station, but the protection scope of the emb...

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Abstract

The invention provides an early warning method and equipment for a secondary circuit fault of a relay protection device. The method comprises steps of S1, acquiring recording files of the plurality of interrelated relay protection devices; S2, according to the recording files, if a first relay protection device that is uniquely triggered or only not triggered to start exists in the relay protection devices, determining that the secondary circuit of the first relay protection device is faulty, otherwise, determining that there is no fault. By determining whether there is a relay protection device that is uniquely triggered or only not triggered to start in the plurality of interrelated relay protection devices, it is possible to detect not only the steady-state fault inside the relay protection devices but also to effectively detect the intermittent hidden failure of the secondary circuit and send an early warning signal, so as to facilitate the timely elimination of hidden dangers and to maintain the safe operation of the power system.

Description

technical field [0001] The invention relates to the field of electric equipment, in particular to an early warning method and equipment for a secondary circuit failure of a relay protection device. Background technique [0002] The secondary circuit is an electrical circuit that monitors, controls, measures, regulates and protects the work of primary equipment. The circuit consists of measuring instruments, relays, control and signal components, automatic devices, relay protection devices, current, voltage transformers, etc. Connected according to certain requirements. [0003] Among them, the secondary measurement circuit of the relay protection electrical signal consists of the current / voltage transformer outside the relay protection device, the signal transmission wire, and the signal transmitter (voltage transmitter and current transmitter) inside the relay protection device. , signal conditioning circuit (low-pass filter, etc.) and A / D converter and other links. Once ...

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Application Information

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IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 陈宏刘海峰
Owner STATE GRID CORP OF CHINA
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