220kV同塔双回线路雷电反击四相同跳故障分析  

Analysis on Back Flashover Four-Phase Simultaneous Trips of 220kV Double-Circuit Transmission Line of the Same Tower

作　　者：曾凡涛 李籽剑 冯志强 杨伟三 岳海波 李愿 ZENG Fantao;LI Zijian;FENG Zhiqiang;YANG Weisan;YUE Haibo;LI Yuan(Enshi Power Supply Company,State Grid Hubei Electric Power Co.,Ltd.,Enshi Hubei 445000,China;Electric Power Research Institute,State Grid Hubei Electric Power Co.,Ltd.,Wuhan Hubei 430000,China;Yichang Power Supply Company,State Grid Hubei Electric Power Co.,Ltd.,Yichang Hubei 443000,China)

机构地区：[1]国网湖北省电力有限公司恩施供电公司,湖北恩施州445000 [2]国网湖北省电力有限公司电力科学研究院,湖北武汉430000 [3]国网湖北省电力有限公司宜昌供电公司,湖北宜昌443000

出　　处：《湖北电力》2021年第6期40-46,共7页Hubei Electric Power

摘　　要：雷击是导致架空输电线路故障跳闸的主要原因之一,严重威胁电网的安全稳定运行。同塔双回线路输送电量大,双回同时故障给电网带来的影响突出,必须采取措施防范此类事件发生。对某220 kV同塔双回线路雷电反击四相同跳故障进行了分析,计算了各相在不同运行状态下的耦合系数,校核了两回线路各相在不同绝缘配置下的反击耐雷水平,全面剖析了线路故障跳闸原因,提出了针对同塔架设输电线路的防雷措施以有效指导同塔双回线路的防雷工作。Lightning strike is one of the main causes of overhead transmission line failure and trips,which seriously threatens the safe and stable operation of power grid. The power transmission capacity of the same tower double-circuit line is large,and the impact of the double-circuit simultaneous failure on the power grid is prominent,so measures must be taken to prevent such incidents. This paper analyzes the problem of four-phase simultaneous trips caused by lightning back flashover of a 220 kV double-circuit line on the same tower,and calculates the coupling coefficients of each phase under different operating conditions. Then the paper checks the lightning tolerate levels of each phase in the double-circuit line under different insulation configurations,comprehensively analyzing the causes of line failure and tripping. Finally,the paper proposes the lightning protection measures for the erection of transmission lines on the same tower to effectively guide the lightning protection work of the same tower double-circuit transmission lines.

关 键 词：同塔双回 反击跳闸 耐雷水平 几何耦合系数 

分 类 号：TM721[电气工程—电力系统及自动化]