500kV同塔双回输电线路雷电反击仿真模型的建立与分析

摘要

雷击是造成输电线路跳闸的主要原因。做好500kV同塔双回输电线路防雷设计,是保证电力系统安全运行的重要环节之一。以某500kV线路为研究背景,用ATP-EMTP软件分别建立雷电流双指数波模型、杆塔分段传输线模型、输电线路Jmarti模型、绝缘子闪络和冲击接地电阻模型,搭建仿真电路,分析了接地电阻和线路档距对500kV同塔双回线路的反击耐雷水平的影响,以期为我国500kV同塔双回线路防雷分析提供参考。%According to the experiences of the power system design and operations,lightning stroke outages is the main reason of transmission line.Lightning protection design is one of important factors to guarantee the safe operation of 500 kV double circuit transmission line.Therefore,in order to provide the reference for our 500 kV double circuit transmission line,with Gui-Fu transmission line as background,the corresponding component models are created by ATP-EMTP.The effect of the grounding resistance and the line span on back striking lightning withstand level are analyzed.