Design and Test of A 500kv Anti-Ice and Anti-Lightning Composite Insulator
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 is hard for installation and maintenance.This paper presents a kind of arrester with feed-through structure and annulus zinc oxide resistors,in series with insulator and grading rings,making up a kind of 500kV anti-lightning and anti-ice composite insulator.The structure parameters of the insulator are proposed,whose total length is less than 5 meters.Insulation co-ordination and electric field simulations are done,and the simulation results shown: the max electric field is 300kV/m under normal working condition,350kV/m when the covered ice is 10mm-thick and the icicles are 10cm-long,which are smaller than the corona and breakdown voltage of air.The power frequency wet withstand test,operation pulse withstand test and lightning flashover test are done,the tested results have shown the effectiveness of the anti-ice and anti-lightning insulator.The work in this paper can provide reference for transmission line protection in regions where lightning and icing frequently happens.
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JIANG Zhenglong XIE Pengkang WANG Bowen FANG Zhen WU Wei
State Key Laboratory of Disaster Prevention & Reduction for Power Grid Transmission and Distribution Equipment State Grid Hunan Electric Power Corporation Disaster Prevention & Reduction Center Changsha,China
国际会议
重庆
英文
1-5
2017-09-25（万方平台首次上网日期，不代表论文的发表时间）