Diagnostic method and device for mechanical fault of circuit breaker

Abstract

The invention relates to the technical field of electrotechnics and electronics, discloses a diagnostic method for the mechanical fault of a circuit breaker and a device for the mechanical fault of the circuit breaker, and aims at solving the technical problem that the diagnosis on the mechanical fault of the circuit breaker is not accurate enough in the prior art. The method comprises the following steps of detecting and obtaining the current waveform of a circuit where an electromagnet coil of the circuit breaker is located in the case of operating the circuit breaker; extracting first characteristic parameters of the circuit breaker from the current waveform, wherein the first characteristic parameters comprise five characteristic moments and four current amplitude parameters; based on a corresponding relationship between the characteristic parameters and mechanical states, determining a first mechanical state, which corresponds to the first characteristic parameters, of the circuit breaker, wherein the first mechanical state represents a mechanical fault state of the circuit breaker. By applying the method and the device, the technical effect that the diagnosis on the mechanical fault of the circuit breaker is more accurate and more convenient is realized.

Description

technical field [0001] The invention relates to the technical field of electric engineering and electronics, in particular to a method and device for diagnosing a mechanical fault of a circuit breaker. Background technique [0002] The circuit breaker is an important device in the power system, which plays the role of control and protection in the power grid. Circuit breaker status detection and fault diagnosis are of great significance for timely detection of circuit breaker defects and faults, reducing the number of maintenance and improving the reliability of circuit breakers. [0003] In recent years, due to the recognition that vibration signals contain a large amount of equipment status information, using vibration signals to detect and diagnose the status of circuit breaker mechanical systems has been more and more applied. A commonly used specific implementation process of this method is It includes: test and measure the vibration signals of the circuit breaker unde...

AI Technical Summary

Problems solved by technology

[0011] The invention provides a method and device for diagnosing mechanical faults of circuit breakers to solve the technical problem that the mechanical fault diagnosis of circuit breakers is not accurate enough in the prior art

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