A Method for Diagnosing Mechanical Faults of High Voltage Circuit Breakers Based on Vibration Signal Analysis

Abstract

The present invention relates to a high-voltage circuit breaker mechanical failure diagnosis method based on vibration signal analysis. The high-voltage circuit breaker mechanical failure diagnosis method based on the vibration signal analysis comprises the steps of measuring the time sequences and the time difference sequences of the occurrence moments of vibration events during the opening and closing processes of a circuit breaker under a normal working condition experiment and a typical fault experiment, and creating a time sequence feature library and a time difference sequence feature library; measuring a time sequence and a time difference sequence of the occurrence moments of the vibration events of an actually operated circuit breaker; comparing the time difference sequence of the occurrence moments of the vibration events during the opening and closing processes of the actually operated circuit breaker with the time difference sequences in the time difference sequence feature library to determine the types of faults; comparing a time sequence of the fault types under the faults of varying degrees in the time sequence feature library with the measured time sequence to determine the degrees of the faults. The method more visually solves the problems that the judgement of the conventional circuit breaker diagnosis method based on the vibration is too simple, and the accuracy is low, and can determine the degrees of the faults.

Description

technical field [0001] The invention relates to a method for diagnosing a mechanical fault of a high-voltage circuit breaker based on vibration signal analysis. Background technique [0002] Compared with other electrical equipment, the high-voltage circuit breaker has many mechanical parts, and its operation process is a short-term energy release and transfer process, accompanied by a series of mechanical movements and impact events, as well as the resulting mechanical vibration. This process has the characteristics of instantaneous, high speed and high kinetic energy, and the mechanical impact on the mechanism and equipment itself is relatively serious. When the equipment has defects in material, process or design, under the action of such external force factors, the high-voltage circuit breaker will have parts deformation and displacement, shaft pin loosening, mechanism jamming, lock failure, tie rod breakage, buffering, etc. Risk of mechanical failure such as abnormalit...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a high-voltage circuit breaker mechanical fault diagnosis method based on vibration signal analysis to solve the problem of low precision of circuit breaker fault judgment caused by too simple criteria

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