Coil inter-turn insulation fault detection method, device and system

Abstract

The invention discloses a coil inter-turn insulation fault detection method, device and system. The method includes the following steps that: the characteristic information of a measured reactance-type coil is acquired, and the characteristic curve of the measured reactance-type coil is drawn according to the characteristic information of the measured reactance-type coil; the difference of the characteristic curve of the measured reactance-type coil and a standard characteristic waveform is calculated according to the characteristic curve of the measured reactance-type coil and the standard characteristic waveform; and if the difference exceeds a first threshold value, it is judged that an inter-turn insulation fault occurs on the measured reactance-type coil. With the coil inter-turn insulation fault detection method, device and system provided by the invention adopted, the detection of the inter-turn short-circuit defect of a reactance-type coil in the control loop of a high-voltagecircuit breaker is realized; the inter-turn insulation state of the reactance-type coil can be detected; and the safe operation of the high-voltage circuit breaker can be realized.

Description

technical field [0001] The invention relates to the technical field of fault detection, in particular to a coil inter-turn insulation fault detection method, device and system. Background technique [0002] The control circuit of the high-voltage circuit breaker in the 500kV substation is an electromagnet mechanical linkage mechanism. Due to the operating years or mechanical characteristics, the insulation performance of the electromagnet coil decreases, resulting in a decrease in the actual number of turns of the electromagnet coil and a decrease in the attraction force of the electromagnet, which in turn leads to circuit breaker control failure. . Since the electromagnet circuit of the circuit breaker is powered by a DC 220V power supply, its actual control operation time is 70ms, that is, the momentary electromagnet suction force is used to realize the opening and closing control of the circuit breaker. If the control fails for some reason, the electromagnet control circu...

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Problems solved by technology

[0003] In view of this, the embodiment of the present invention provides a coil inter-turn insulation fault detection method, device and system to solve how to detect the inter-turn short-circuit defect of the reactive coil in the control circuit of the high-voltage circuit breaker to realize the high-voltage circuit breaker safe operation issues

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