架空输电线路雷击暂态过电压分布规律模拟研究  

Transient Overvoltage Distribution of Lightning Strike of Overhead Transmission Lines

作　　者：赵留学[1] 王建荣 谭磊[1] ZHAO Liuxue;WANG Jianrong;TAN Lei(State Grid Beijing Electric Power Company,Beijing 100031,China;School of Mathematical Sciences,Shanxi University,Taiyuan 030006,China)

机构地区：[1]国网北京市电力公司,北京100031 [2]山西大学数学科学学院,太原030006

出　　处：《电瓷避雷器》2022年第3期97-102,122,共7页Insulators and Surge Arresters

基　　金：山西省自然科学基金项目“基于复杂网络的协作通信网传输容量分析与优化”(编号:201801D221171)。

摘　　要：研究架空输电线路雷击暂态过电压分布规律,为架空输电线路的防雷保护和绝缘设计提供可靠依据。使用Marti线路模型分析架空输电线路的频变特性;利用电晕模型模拟电晕效应,使用镜像法推导输电线路几何电容表达式,计算电晕出现时线路的动态电容。在ATP-EMTP电磁暂态仿真软件中研究线路感应暂态过电压和雷电绕击过电压的暂态分布规律,研究绕击过电压的影响因素。模拟仿真结果表明:同时考虑冲击电晕效应和线路参数频变特性能够更加准确计算出输电线路过电压分布规律;出现雷绕击故障的A相线路电压高于未发生故障的B、C相线路,距离雷电击位置越远暂态电压衰减幅度越明显。The distribution law of lightning transient overvoltage of overhead transmission lines is studied to provide reliable basis for lightning protection and insulation design of overhead transmission lines. The frequency variation characteristics of overhead transmission lines are analyzed by using Marti line model;corona effect is simulated by corona model;geometric capacitance expression of transmission line is deduced by image method, and dynamic capacitance of transmission line is calculated when corona occurs. In the ATP-EMTP electromagnetic transient simulation software, the transient distribution of line induced transient overvoltage and lightning shielding overvoltage is studied, and the influencing factors of shielding overvoltage are studied. The simulation results show that: considering the impulse corona effect and the frequency variation characteristics of line parameters, the overvoltage distribution of transmission lines can be calculated more accurately;the voltage of phase A line with lightning shielding failure is higher than that of phase B and C lines without fault, and the farther away from the lightning strike location, the more obvious the transient voltage attenuation amplitude is.

关 键 词：架空输电线路 雷击 暂态 过电压 分布规律 

分 类 号：TM863[电气工程—高电压与绝缘技术]