A Comprehensive Evaluation Method For Operation Condition Of SF6Circuit Breakers Based On The Bayesian Network

In these years, with the investment in construction of power system increasing,the scale of power system and the equipment is also increasing. So we need more andmore on condition maintenance. While condition maintenance is focused ondetermining the states of equipment. Determining the operating state of SF6circuitbreakers is one of the most important tasks in power system. In the view of theincreasing of power equipments and the urgent needs of equipment condition-basedmaintenance in Shijiazhuang power system at present, we selected the mostrepresentative SF6circuit breaker as the research object on the state assessment. Foroperation condition of SF6circuit breakers, this paper proposed a comprehensiveevaluation method which is based on the Bayesian Network.This paper selected the states information of SF6breakers in Shijiazhuang powergrid and carried on the summary analysis. According to the field work, combiningwith fuzzy theory, we established evaluation index system of SF6circuit breakers,used digitals to evaluate the states of SF6circuit breakers, and established thecentesimal system. Using SF6circuit breaker state information scores and gradeevaluation methods on Shijiazhuang power grid, we can get the scores of differentperiods including previous，present and prospective operation condition individually.Eventually, we built the model using Bayesian network. Then, we sent the evaluationto the model and test it. So, we get a comprehensive conclusion of the SF6circuitbreaker condition. At last, it provided supports to SF6circuit breakers on maintenancework.