Method and device of diagnosing running state of circuit breaker mechanism

Abstract

The invention discloses a method and a device of diagnosing a running state of a circuit breaker mechanism. The method comprises steps of: testing and simulating opening and closing coils of all models according to preset fault types, temperature and voltage, so as to obtain a current sample, and constructing a coil database according to the current sample, wherein the coil database comprises normal current curves, various fault current curves, temperature coefficients and voltage coefficients of opening and closing coils of all models; and according to the coil database, diagnosing collectedcurrents of to-be-tested opening and closing coils, so as to obtain a running state diagnosis result. The coil database can be updated by using the running state diagnosis result, corresponding coil databases can be established for opening and closing coils of different models, so as to guarantee pertinence and accuracy of diagnosis; further, the fault type can be diagnosed, fault diagnosis is more accurate, and the coil database can be expanded and updated in real time so as to improve the applicability.

Description

technical field [0001] The invention relates to the technical field of electrical engineering measurement, in particular to a method and device for diagnosing the operating state of a circuit breaker mechanism. Background technique [0002] In recent years, with the increase of power grid load and the improvement of users' requirements for the reliability of electricity consumption, the requirements of power systems for power equipment have become more and more stringent. As one of the most important power equipment in the power system, the circuit breaker not only plays the role of controlling the live and normal load current, but also plays the role of protection for carrying, breaking and closing abnormal current within the specified time. Therefore, A circuit breaker failure will cause a serious grid accident. [0003] According to the statistical data of actual operation, the vast majority of circuit breaker failures are caused by mechanism failures, and timely detecti...

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Problems solved by technology

[0004] The embodiment of the present invention provides a method and device for diagnosing the operating state of a circuit breaker mechanism, which can effectively solve the problem that the existing technology cannot accurately find the cause of a circuit breaker failure, and can establish a corresponding coil database for different types of opening and closing coils, and can Effectively improve the pertinence and accuracy of diagnosis

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