Construction of Dynamic Weights in State Degradation of AC Contactor

Abstract AC contactor needs to break the main circuit and control circuit frequently in the process of operation. With the accumulation of electrical stress and other losses, AC contactor will fail, causing accidents and huge losses. The whole life model of AC contactor is designed to objectively reflect the state information during the operation of AC contactor and predict the end time of the electric life of the contactor, so as to ensure the safe and reliable operation of the power system. The whole life test of AC contactor was carried out under the test condition of AC-4, and the parameters of the whole life model were obtained from the test data. In order to accurately reflect the influence degree of each characteristic parameter on the life during the whole degradation process, the general constant weight evaluation model was optimized. The results show that the evaluation model with dynamic weight is better than that with constant weight.