Research on Circuit Breaker Switching Model Modified Based on Measured Data Considering Multi Stochastic Factors

Vacuum circuit breakers (VCBs) are commonly used to switch shunt reactive power equipment in distribution networks. There are many stochastic factors in the switching process of the VCBs, which results in a statistical distribution of the switching overvoltage under a large number of switching operations. The parameters of the traditional circuit breaker models are usually fixed, so it is difficult to evaluate and track the overvoltage risk under daily switching. In order to solve this problem, considering multi stochastic factors in the switching process, a 10kV circuit breaker switching model modified based on measured data is established in MATLAB. Using the modeling method proposed in this paper, the model parameters can be constantly corrected by the measured data to improve the accuracy of the simulation results. Finally, it can be used to track and analysis the risks of switching overvoltage.