Electric Field Optimization for High Voltage Circuit Breaker Using FEM

摘要

This paper gives an optimized solution for the electric field of high voltage SF_6 circuit breaker and the optimized contour of electrode has been achieved using Finite Element Method (FEM). As the development of high voltage switches, there are higher requirements for excellent qualities of the arc-quenching and insulation in the interrupter of the high voltage circuit breaker. However there are more than one dielectric in the interrupter, and the structure is complex, so it is very difficult to analyze the electric field. FEM is effective for the complex engineering analysis. For the advantage of FEM method, electric field in the interrupter is optimized by adjusting the shape of the electrodes with the electric flux density as object function. Based on the analysis, the optimized shape of the electrodes is obtained. The result shows that the optimization method presented here is very useful in designing the shape of the inner interrupter.