高电压技术2017，Vol.43Issue(12)：3843-3849,7.DOI:10.13336/j.1003-6520.hve.20171127005
具有防雷功能的500kV线路绝缘子优化设计及防雷防冰闪试验分析
Optimization Design and Lightning & Icing Protection Test of 500 kV Anti-icing Flash Insulator with Lightning Protection Function
摘要
Abstract
Installing arresters is a good method of lightning protection for transmission lines.The existing air gapped and non-air gapped arresters have their disadvantages,which are hard for installation and maintenance.We put forward a kind of arrester with feed-through structure containing annulus zinc oxide resistors,which is in series with insulator and grading rings to form a kind of 500 kV anti-lightning and anti-icing composite insulator.The structure parameters of the insulator are proposed,whose total length is less than 5 m.Insulation coordination and electric field simulations are performed.The simulation results show that the max electric field is 300 kV/m under normal working condition.It will be 350 kV/m when the covered ice is 10 mm-thick and the icicles are 10 cm-long,which are smaller than the corona and breakdown voltage of air.The power frequency wet withstand,operation pulse withstand t and lightning flashover were tested.The tested results show that the effectiveness of the anti-ice and anti-lightning insulator.The work in this paper can provide a reference for transmission line protection in regions where lightning and icing frequently happen.关键词
输电线路/绝缘子/防雷防冰闪/场强计算/过电压Key words
transmission line/insulator/lightning and icing protection/field strength calculation/overvoltage引用本文复制引用
蒋正龙,吴伟,尹小根,王博闻,姚尧,谢鹏康..具有防雷功能的500kV线路绝缘子优化设计及防雷防冰闪试验分析[J].高电压技术,2017,43(12):3843-3849,7.基金项目
国家电网公司科技项目(5216A015001N).Project supported by Science and Technology Project of SGCC (5216A015001N). （5216A015001N）
