高压SF6断路器灭弧室电场逆问题求解研究

采用有限元法对高压SF6断路器灭弧室内电场分布进行数值仿真求解,计算分析了灭弧室内部动、静触头在开断过程中不同行程下电场分布情况，得到了全场域最大场强所在位置，以及动、静主触和弧触沿面场强分布，研究了灭弧室内部绝缘的主要影响因素，并将仿真结果进行可视化处理.在此基础上进行电场逆问题求解，实现灭弧室内部结构优化设计.在优化设计中分别采用零阶方法和一阶方法，以动、静触头几何结构为优化设计变量，以灭弧室内部最大场强最小为优化目标函数，循环迭代次数为停止准则，进行灭弧室电场逆问题研究.并将优化结果与产品结构进行对比分析，证明了优化设计的可行性和有效性.

Study on inverse problem of electric field for high voltage SF6 arc quenching chamber

The electric field distributions in the arc-quenching chamber of high voltage SF_6 circuit breaker have been computed using finite element method.The electric fields of the interrupter in different opening strokes have been calculated and the maximum of the electric field strength has been found.The(distributions) of the electric field strength along the fixed and movable contact have been obtained.(Moreover),the insulation strength of the chamber has been evaluated.During the optimization,zero order and one order optimization methods have been determined as the optimized approach,and the structures of the movable,fixed contacts have been selected as the optimized variables.The minimum of the electric field strength is considered as the optimized function,and the iteration number is regarded as the stop(criteria).With the comparison of the(optimized) result and that of the manufactured,the feasibility and efficiency of the optimized approach have been verified.