Maintenance decision of circuit breaker based on fuzzy probability mixed reliability evaluation

The maintenance strategy of circuit breakers is studied. By using the common condition monitoring indexes of circuit breakers and classifying the indexes according to different fault types, a fuzzy comprehensive evaluation algorithm for the health status of circuit breakers is proposed, and the membership degree of each status comments of circuit breakers is obtained. According to the membership degree and failure rate, the probability distribution of each state of the circuit breakers is calculated, which reflects the actual state of the circuit breaker more comprehensively; On this basis, the failure rates corresponding to different membership degrees are used to quantitatively evaluate the impact of circuit breakers on the reliability of substation level, and the abnormal probability of circuit breakers and the impact of circuit breakers on the reliability of substation are comprehensively analyzed. The maintenance decision method of circuit breakers is proposed to determine the economic and reliable maintenance mode under the condition of considering the circuit breaker status and the reliability of substations. This method can improve the system’s reliability and ensure the economy of resource allocation.