500 kV线路鸟粪引起的空气间隙击穿跳闸分析  

Analysis on Air Gap Breakdown Trips Caused by Bird Droppings in 500 kV Lines

作　　者：黄金领[1] 黄金泉 韦学浩 邓永健[1] HUANG Jinling;HUANG Jinquan;WEI Xuehao;DENG Yongjian(Nanning Bureau of EHV Transmission Company of China Southern Power Grid Co.,Ltd.,Nanning 530028;Laibin Power Supply Bureau of Guangxi Power Grid Co.,Ltd.,Laibin 546100)

机构地区：[1]中国南方电网超高压输电公司南宁局,广西南宁530028 [2]中国南方电网广西电网公司来宾供电局,广西来宾546100

出　　处：《电力安全技术》2021年第10期28-31,34,共5页Electric Safety Technology

摘　　要：为提高输电线路防鸟害水平,深入分析了500 kV平来一线鸟害跳闸故障。通过对行波测距、故障痕迹、鸟粪痕迹以及鸟粪拉丝成线短接空气的分析,得出结论:鸟粪排泄在均压环等物体上,使得其有足够的滴落拉丝成线时间,形成足以短接大部分空气间隙的长度,使得剩下的空气间隙被工频电压击穿,从而造成500 kV线路跳闸。总结了鸟粪引起空气间隙击穿跳闸的常见特性,并提出了在绝缘子挂点横担上铺设绝缘挡板,加大鸟粪下落时与绝缘子水平距离,以及安装防鸟刺、声光驱鸟器、防鸟罩、引鸟鸟巢等防范措施。In order to improve the bird damage prevention level for transmission lines,a case on tripping fault of 500 kV Pinglai Line due to bird damage is deeply analyzed.Through the analysis on traveling wave ranging,fault trace,bird droppings trace and short circuiting of air switch caused by wire drawing of bird droppings,the common characteristics of air gap breakdowns and trips caused by bird droppings are summarized,and a certain preventive measures are put forward,such as laying insulating baffles on the cross arm of insulator hanging points,increasing the horizontal distance between bird droppings and insulators,and installing bird thorn prevention,sound and optical bird drives,bird covers,bird guide nests,and so on.

关 键 词：500 kV线路 鸟粪 空气间隙 击穿 

分 类 号：TM726.1[电气工程—电力系统及自动化]