摘要
均压环是改善复合绝缘子电位分布和电场分布直接而有效的方式,在特高压输电系统中极其重要。为此,对特高压直流复合支柱绝缘子的电位分布和电场分布进行了计算,引入了大均压环表面、护套沿面、高压端金具表面和小均压环表面等处的最大电场强度作为优化参考量,并探讨了各均压环参数和各优化参考量间的联系,分析了大小均压环各参数优化的相互影响,拟定了大小均压环各结构参数的优化顺序,提出了特高压直流复合支柱绝缘子均压环优化方法。并以±1 100 kV直流空心复合支柱绝缘子和±800 kV直流实心复合支柱绝缘子为例,建立了电场计算模型,对其均压环进行了优化设计。改进后的优化方法能够较快、有效地找到满足条件的优化方案。
As a direct and effective method to improve the distribution of potential and electric field on composite insu- lators, grading rings are exceedingly essential in UHV power transmission systems. We calculated the potential and electric field distribution on UHV DC composite post insulators using a finite-element-method software. The maximum electric field strengths for four positions of the major grading ring surface, the housing surface, the metal fitting surface at high voltage end, and the minor grading ring surface are introduced as reference variables for optimization. The relation- ship between parameters of grading rings and the optimization variables is explored, as well as the order of optimizing parameters of grading rings. An improved optimization method for grading rings of UHV DC composite post insulators is then proposed. Simulation models of a ±1 100 kV UHV DC post hollow composite insulator and a ±800 kV UHV DC post solid core composite insulator are established, and the grading rings for these two insulators are designed. Results show that the improved optimization method can rapidly and efficiently approach optimal schemes.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2014年第1期46-54,共9页
High Voltage Engineering
基金
国家创新研究群体基金(51021005)
国家重点基础研究发展计划(973计划)(2009CB724503)
全国优秀博士学位论文作者专项资金(201240)~~
关键词
特高压直流
复合支柱绝缘子
电场分布
电位分布
均压环
优化设计方法
UHV DC
composite post insulator
electric field distribution
potential distribution
grading ring
optimiza-tion method
