Abstract
Smart substations are generally equipped with mechanical characteristics monitoring devices for HV circuit breakers, which collect the key mechanical characteristic parameters of circuit breakers. The key mechanical characteristic parameters of circuit breaker energy storage motor and opening and closing operation are selected for fuzzy comprehensive calculation to evaluate the comprehensive working conditions of the mechanical characteristics of HV circuit breakers. This method takes the error quantity of mechanical characteristic parameters deviating from the normal value as the evaluation factor, determines the membership function according to expert experience, and analyzes and comprehensively evaluates the mechanical characteristics of HV circuit breakers according to the calculation results. In this paper, the on-line monitoring data of the mechanical characteristics of circuit breakers under normal and abnormal conditions are evaluated by fuzzy comprehensive evaluation. The results show that this method can correctly reflect the mechanical characteristics of HV circuit breakers and provides a feasible method for the on-line evaluation of the mechanical characteristics of circuit breakers in smart substations.
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