Modeling based on the structure of circuit breaker is beneficial to study the different effects of each component of the circuit breaker on its opening and closing characteristic process

which is of great significance for fault location identification

fault classification and diagnosis. In this paper

both mechanical and electrical models for the functional characteristic of each part of the circuit breaker are set up respectively. Then

the multi-domain model of the high-voltage circuit breaker is formed by the use of interrelation between mechanical and electrical and by way of combining individual part model with MATLAB/Simulink software. After that

the parameters of high-voltage circuit breaker under study are set

the simulation is performed in the MATLAB/Simulink environment to obtain the opening stroke curve of the circuit breaker and the current characteristics of the opening coil

and then the different displacement characteristics are obtained by changing the friction parameters of the mechanical part and the spring rigidity coefficient of the model and different coil current characteristics are obtained by changing parameters of the electrical part. Finally

the obtained results are analyzed to obtain the influence of different parameters on partial characteristics of circuit breaker

which lays a foundation for better and more comprehensive fault classification and diagnosis in the future.