Method for coil current curve reconstruction of circuit breaker operating mechanisms on basis of feature points

Abstract

The invention discloses a method for coil current curve reconstruction of circuit breaker operating mechanisms on basis of feature points. Circuit breakers are important primary equipment for power systems, performance reliability of the circuit breakers directly affects operational reliability of the power systems, and mechanical faults of the circuit breaker operating mechanisms are major faults, so that diagnosis of the mechanical faults of the circuit breaker operating mechanisms is very important. The method includes: (1) monitoring to acquire original data of opening-closing coil current of the circuit breaker operating mechanisms under conditions of normal operation and various possible faults, and extracting six feature points of the original data, wherein the six feature points of the original data include coil current parameters {I0, I1, I2, I3, I4, I5} and corresponding time parameters {t0, t1, t2, t3, t4, t5}; (2), reconstructing coil current curves of the circuit breaker operating mechanisms. The method is used for reconstructing opening-closing coil current curves of the circuit breaker operating mechanisms.

Description

Technical field: [0001] The invention relates to a method for reconstructing a coil current curve of a circuit breaker operating mechanism based on feature points. Background technique: [0002] The circuit breaker is an important primary equipment in the power system. The reliability of the circuit breaker performance directly affects the reliability of the power system operation, and the reliability of the circuit breaker mainly depends on the reliability of its operating mechanism, and the mechanical failure of the circuit breaker operating mechanism is the main Therefore, it is very important to diagnose the mechanical failure of the circuit breaker operating mechanism. The diagnosis of mechanical failure of the circuit breaker operating mechanism can be accomplished by measuring various mechanical parameters of the circuit breaker, among which the current signal of the opening and closing coil is one of the important monitoring parameters. The current waveform of the o...

AI Technical Summary

Problems solved by technology

[0003] However, since each manufacturer uses different circuit breaker monitoring systems when performing performance tests on circuit breaker operating mechanisms, the original data formats obtained may also be different. Some manufacturers only provide test reports with several key feature points to users. , the user cannot obtain the electronic data file of the opening and closing coil current curve of the entire circuit breaker operating mechanism, so the current technology limits the further analysis of the operating state of the circuit breaker operating mechanism, so the reconstruction of the coil current waveform is in some cases is very necessary

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