Intelligent Diagnosis Method of Metering Cabinet Health State Based on Multi-source Information and Fuzzy Comprehensive Evaluation

The evaluation of the operation health status of the metering cabinet is helpful to ensure the stable operation of the distribution network system. Aiming at the problems of imperfect characteristic quantity system and insufficient basis for state classification in metering cabinet state evaluation method, a multi-source information layered state parameter model was established based on the state information of insulation, circuit breaker, environment, load, electric energy and cabinet door. Then, threshold mapping interval was established through operation experience and relevant standards, and then combined with analytic hierarchy process Finally, a comprehensive evaluation model of fuzzy state was established by combining fuzzy normal function with fuzzy normal function. The results show that the fuzzy state comprehensive evaluation model can reflect the characteristic information of equipment operation state, and the identification result of the model is consistent with the actual state, which can shield the state with lower membership degree.