126 kV真空断路器灭弧室电场数值分析

为了解真空灭弧室电场分布情况，并找出灭弧室设计的关键部位，基于电场数值分析理论，采用有限元法对126kV真空断路器灭弧室内部静电场进行了仿真计算.考虑灭弧室内部主屏蔽罩结构对电场分布的影响，分析了加伞群后电场分布的变化情况，并给出了灭弧室内动静触头表面处的电场强度值.通过对不同触头开距情况下的电场进行计算，获得了在不同情况下的灭弧室电场分布情况，给出了不同开距下的电场强度最大值，为触头结构的优化分析、真空断路器的触头设计及真空灭弧室的优化设计提供了理论依据.

Numerical analysis on electric field inside interrupter of 126 kV vacuum circuit breaker

To understand the electric field distribution inside vacuum interrupter and find out the key parts in interrupter design, the static electric field inside the interrupter of 126 kV vacuum circuit breaker was simulated〖JP〗 with finite element method and based on the numerical analysis theory for electric field. With considering the influence of the structure of main shield cover inside the interrupter on the electric field distribution, the change of electric field distribution after adding sheds was analyzed, and the electric field intensity values on the surface of both movable and fixed contacts inside the interrupter were given. Through calculating the electric field under different contact gap length, the electric field distribution inside the interrupter under different situations was obtained, and the maximum electric field intensity values under different contact gap length were given. The present results can provide the theoretical basis for the optimization analysis of contact structure, the contact design of vacuum circuit breaker and the optimization design of vacuum interrupter.