高电压技术2011，Vol.37Issue(12)：3129-3134,6.
500kV交流绝缘子串不同布置方式下覆冰闪络特性的试验研究
Experimental Study on the Flashover Characteristics of 500 kV AC Ice-covered Insulator String Under Different Arrangement
摘要
Abstract
We experimentally researched 500 kV polluted and icing ac insulator strings under different arrangements,and analyzed the ice condition,flashover process,and flashover voltage of insulator string.The results show that,because of the arc floating from one side of the insulator strings to the other side in the discharge process,the distance along the surface of insulation is greatly shortened,resulting in the lower flashover voltage of double I string than that of I string in consequence.For the V string,the gaps between sheds are difficult to be bridged and the surface contamination can be easily washed away by molten ice,so the flashover voltage of V string is higher than the other two arrangements.If the insulator string is under light or moderate icing conditions,the flashover voltage of ＂3＋1＂ string is higher than the phase voltage of 500 kV AC power line;however,under severe icing conditions,the flashover voltage will be lower than phase voltage.The test results can be used to select arrangement method of insulator string for different icing regions.关键词
覆冰/超高压交流输电线路/污秽/绝缘子串/闪络特性/布置方式Key words
ice-covered/EHV AC transmission line/pollution/insulator string/flashover characteristics/arrangement分类
信息技术与安全科学引用本文复制引用
石岩,万启发,许佐明,徐涛,姚涛..500kV交流绝缘子串不同布置方式下覆冰闪络特性的试验研究[J].高电压技术,2011,37(12):3129-3134,6.基金项目
国家重点基础研究发展计划（973计划） （）
国家电网公司重大科技项目（SG0858）~~ （）
