中国电力2018，Vol.51Issue(1)：64-70,7.DOI:10.11930/j.issn.1004-9649.201606210
500kV输电线路绝缘地线雷电流分布
Lightning Current Distribution of Insulated Ground Wire in 500 kV Transmission Line
汤涛 1向城名1
作者信息
- 1. 国核电力规划设计研究院重庆有限公司,重庆 401121
- 折叠
摘要
Abstract
Ground wire icing severely affects the safeoperation of overhead transmission line in medium and heavyicing area.Direct Current (DC) melting ice is one of the effectivemeasures to solve overhead transmission line icing.When lightning stroke failure of the transmission line occurs,the lightning current distribution between insulated ground wire and towers decide the top potential of tower,which has impacts on lightning protection level and the grounding of transmission line.This paper uses the electromagnetic transient analysis program EMTP to calculate and analyze the lightning current distribution.The results show that the majority of lightning current pass through the towers in 500 kV transmission line,and lightning current amplitude,horizontal span of tower and grounding resistance have a greater impact on shunt coefficient of insulated ground wire and tower.This research has a significant theoretically value to tower shunt coefficient,potential's increase tower and economical design of power system.关键词
输电线路/绝缘地线/雷电流分布/EMTP/分流系数Key words
transmission line/insulated ground wire/lightning current distribution/EMTP/shunt coefficient分类
信息技术与安全科学引用本文复制引用
汤涛,向城名..500kV输电线路绝缘地线雷电流分布[J].中国电力,2018,51(1):64-70,7.
