特高压交流输电线路倒V型绝缘子串电场分布计算和均压环参数优化设计

摘要

倒V型复合绝缘子串相比悬垂绝缘子串有更好的防污、防冰特性，适用于特高压输电线路的改造，而绝缘子串的金具电晕特性问题需要关注。为保障特高压交流输电线路倒V型复合绝缘子串均压环满足工程防晕降噪要求，本文建立了特高压输电线路倒V型复合绝缘子串和均压环的三维有限元模型，采用有限元软件ANSYS对复合绝缘子串和均压环表面电场进行了计算，分析了均压环中心直径、管径、罩入深度、倒V串夹角以及绝缘子串长对电场分布的影响。在综合考虑各因素的前提下，采用控制变量法给出了均压环等参数优化配置建议。%The backward V⁃type insulator is usually used in reforming transmission line because its good properties in windage protection and anti⁃icing, while the corona problem of transmission line must be taken into account. To ensure that the anti⁃corona noise of grading rings on the backward V⁃type insulator on UHV AC transmission line meet the engineering requirement, this paper establishes a three⁃dimensional electrostatic field analysis model of the backward V⁃type insulator on UHV AC transmission line. And with the method of finite element and the finite ele⁃ment software ANSYS, the electric field distribution of the backward V⁃type insulator and the grading rings is calcu⁃lated. The influence of the ring diameter, pipe diameter, position of the grading ring, the angle of the backward V⁃type insulator and the length of the insulator on the electric field are discussed. With the various factors taken into account, a suggestion of grading ring configuration is proposed.