单节型结构对高压MOA耐不均匀重污秽性能的改善及应用  

IMPROVING PERFORMANCE OF HIGH VOLTAGE MOA BY SINGLE-UNITSTRUCTURE IN UNEVEN HEAVY POLLUTION AREA

作　　者：徐黎明[1] 王睿[1] 郭洁[1] 

机构地区：[1]西安交通大学,西安电瓷研究所

出　　处：《电网技术》1996年第11期13-15,共3页Power System Technology

摘　　要：本文以葛洲坝５００ｋＶ日立ＭＯＡ近年来连续三次事故为例，分析了不均匀重污秽对多节避雷器电位分布的影响，它使避雷器局部荷电率过高，易导致避雷器的热崩溃，并据此提出了单节型避雷器的优越性及在我国重污秽地区代替多节型避雷器的可行性。Taking the three successive faults as example which took place in recent years in 500kV MOAs manufactured by Hitachi Co.and installed in Gezhouba Hydro Power Station,the influence of uneven heavy pollution on stress distribution of multi-unit arrestor is analyzed.Uneven heavy pollution causes the extreme uneven potential distribution on the surface of arrester and therefore leads to the thermal stress collapse of the arrester.Thus the author analyzed the feasibility of replacing multi-unit arrester by single-unit arrester in heavy pollution zone.

关 键 词：金属氧化物 避雷器 污秽 

分 类 号：TM862[电气工程—高电压与绝缘技术]