Airflow Field Simulation and Structural Optimization of High Voltage SF6 Circuit Breaker Interrupter Based on Orthogonal Experiment

Abstract

In order to improve the high voltage SF6 circuit breaker breaking performance, the simulation scheme of multi-parameter optimization design of circuit breaker interrupter is proposed based on the orthogonal experiment method. Through numerical modeling and simulation of interrupter airflow field, the effects of three parameters such as of cylinder diameter, expansion chamber diameter and nozzle throat diameter on the breaking performance of circuit breakers were studied. An interrupter structure with the best breaking performance was obtained. Simulation results show that, among the above three parameters, the nozzle throat diameter has the greatest influence on the breaking performance of circuit breakers. The smaller the nozzle throat diameter, the stronger the breaking performance of the circuit breaker. This is of great significance to the multi-parameter optimization design of high voltage SF6 circuit breaker interrupter structure.