超/特高压输电线路雷电绕击分析方法及其适应性  

Analysis Methods for Lightning Shielding Failure of Transmission Lines and Associated Applicability

作　　者：何金良[1] 庄池杰[1] HE Jiniang;ZHUANG Chijie(Department of Electrical Engineering,Tsinghua University,Haidian District,Beijing 100084,China)

机构地区：[1]清华大学电机工程与应用电子技术系,北京市海淀区100084

出　　处：《中国电机工程学报》2024年第18期7426-7439,I0025,共15页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

摘　　要：输电线路雷击已成为制约电力系统安全可靠运行的首要因素,而500 kV及以上电压等级的输电线路主要以雷电绕击导线为主。该文在回顾电气几何模型发展历史的基础上,针对电气几何模型忽略大部分雷击物理过程的问题,详细分析先导发展法,包括雷击输电线路物理过程、先导发展模型参数选择、数值方法实现及模型验证,该方法能够全面模拟雷击发展的物理过程;最后,采用先导发展法分析影响线路绕击特性的因素,并讨论不同绕击分析方法的适用范围,对于500 kV及以上的超特高压线路以及同塔多回输电线路,宜采用先导发展法分析雷电绕击。该研究可为输电线路防雷设计及运行事故分析提供关键技术支撑。Lightning striking has become the primary factor that threatens the safe and reliable operation of the power system,and the transmission lines with voltage levels of 500 kV and above are mainly affected by lightning shielding failure.On the basis of summarizing the development of electro-geometric model and to overcome the problem that electro-geometric models ignore most of the physical processes of lightning strikes,this paper provides a detailed analysis of the leader propagation model(LPM),including the physical process of lightning strikes on transmission lines,parameter selection of the model,numerical implementation,and model validation.The factors affecting the shielding failure of transmission lines are analyzed,and the applicability of different shielding failure analysis methods is discussed.For transmission lines with voltage levels of 500 kV and above,as well as multi circuit transmission lines on the same tower,the leader propagation model should be used to analyze the lightning shielding failure rate.This paper provides important technical support for lightning protection design and operation accident analysis of transmission lines.

关 键 词：输电线路 雷电防护 绕击 电气几何模型 先导发展法 适用性 

分 类 号：TM863[电气工程—高电压与绝缘技术]