Circuit breaker operating mechanism defect multi-dimensional diagnosis method and system

Abstract

The invention discloses a circuit breaker operating mechanism defect multi-dimensional diagnosis method and system, and belongs to the technical field of electrical equipment diagnosis. The method comprises the following steps of: obtaining a current oscillogram according to coil current, performing characteristic value extraction on the current oscillogram, obtaining a coil current characteristic value, and comparing the coil current characteristic value with a characteristic value of a standard oscillogram so as to judge the running state and the defect type of a circuit breaker operating mechanism; through an on-line monitoring mode, monitoring current signals of an opening and closing coil in real time, storing current waveform data, and judging the change trend of key performance of the circuit breaker operating mechanism is from multiple dimensions; and comprehensively judging the running state of a circuit breaker according to the running state and the defect type of the circuit breaker operating mechanism and the change trend of the key performance of the circuit breaker operating mechanism. According to the method and system, the operation state and the development trend of the circuit breaker can be comprehensively judged in a multi-dimensional mode through comparative analysis of the current waveform of the opening and closing coil and the standard waveform, analysis of the time dimension and analysis of the space dimension.

Description

technical field [0001] The invention relates to the technical field of electrical equipment diagnosis, in particular to a method and system for multi-dimensional diagnosis of a circuit breaker operating mechanism defect. Background technique [0002] High-voltage circuit breakers can not only break, close and carry the normal working current of the running line, but also carry, close and break the specified short-circuit current within the specified time. It is the most important control and protection equipment in the power system. High-voltage circuit breakers are not only independent key substation equipment, but also the core components of GIS and switchgear, and their safe and stable operation is of great practical significance. Circuit breaker refusal to open, refusal to close or malfunction caused by electrical or mechanical failure of circuit breaker operating mechanism is a key component of circuit breaker failure and emergency major defects, which seriously affects...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, judging the operating state of the circuit breaker operating mechanism includes measuring the operating voltage of the opening and closing electromagnet and testing the mechanical characteristics of the circuit breaker. However, in the diagnosis process, power failure is required to perform the test, and the method of power failure and shutdown is used in regular maintenance. Diagnosing circuit breakers takes a lot of time

Images