高电压技术2013，Vol.39Issue(3)：612-617,6.DOI:10.3969/j.issn.1003-6520.2013.03.015
特高压变电站支柱绝缘子重覆冰闪仿真计算与试验分析
Study on Flashover Model of UHV Substation Post Insulator in Serious Icing Condition
摘要
Abstract
Substation post insulators are easier to ice than line insulators, and they impact transmission lines more seriously. In order to obtain icing electrical performance of ultra high voltage(UHV) substation post insulators, we established a flashover model of post insulators in serious icing condition based on the Obenaus concept. Moreover, we tested on the model by using solid layer method and applied water conductivity method, and compared the results. The comparison showed that the influences of surface salt density and icing water conductivity on the flashover voltage were independent from each other while both showing a negative exponent trend, and the degree of pollution had a linear relationship with the icing water conductivity. A model for calculation was established by considering only an equivalent icing representing the combined effects of pollution and applied icing water conductivity, which reduced the difficulty of computing. The model was adopted to calculate the flashover voltages of post insulators in serious icing, and the error of the computed results from the test results was less than 10% , proving the model to be accurate.关键词
覆冰/支柱绝缘子/闪络电压/闪络模型/污秽/覆冰水电导率/特高压(UHV)Key words
icing/post insulators/ flashover voltage/ flashover model/ pollution/ icing water conductivity/ UHV引用本文复制引用
李学林,姚涛,李金,蔡林,贾如..特高压变电站支柱绝缘子重覆冰闪仿真计算与试验分析[J].高电压技术,2013,39(3):612-617,6.基金项目
国家电网公司科技项目(SG0923). （SG0923）
