电瓷避雷器Issue(6)：36-43,8.DOI:10.16188/j.isa.1003-8337.2024.06.005
雷击500 kV输电线路杆塔分流特性计算研究
Simulation Study on Surge Current Distribution due to Lightning Strike on 500 kV Transmission Line Towers
李磊 1张雷 1黄登一 1吴敏 2富梦迪 1孔繁哲1
作者信息
- 1. 国家电网有限公司华北分部,北京 100053
- 2. 国网电力科学研究院武汉南瑞有限责任公司,武汉 430074||电网雷击风险预防湖北省重点实验室,武汉 430074||国家能源雷电灾害监测预警与安全防护重点实验室,武汉 430074
- 折叠
摘要
Abstract
Lightning strikes pose a serious threat to the safe operation of transmission lines and equipment reliability.At present,the research on the current distribution characteristics of tower lightning in 500 kV transmission lines under real environment and operating conditions is not enough.In order to enhance the lightning protection level of transmission lines,the author conducts simulation calculations of lightning strikes on a 500 kV transmission line using ATP-EMTP.The research focuses on investigating the ar-rester shielding factor of towers under various conditions.The research results indicate that the steeper the wavefront of lightning current,the greater the shielding factor of the tower,while a larger half-wave time leads to a smaller shielding factor of the tower.The amplitude of lightning current has no effect on the shielding factor.Additionally,a higher tower grounding resistance results in a smaller shielding fac-tor.Moreover,the shielding factor decreases when the tower at the terminal end is struck by lightning.Furthermore,the use of good conductor ground wires can reduce the tower's shielding factor.Rational de-sign and placement of lightning protection facilities for towers based on the research results are crucial for mitigating the impact of lightning strikes on transmission lines.关键词
输电线路/雷电流分流系数/接地电阻Key words
transmission line/shielding factor/grounding resistance引用本文复制引用
李磊,张雷,黄登一,吴敏,富梦迪,孔繁哲..雷击500 kV输电线路杆塔分流特性计算研究[J].电瓷避雷器,2024,(6):36-43,8.
