交流特高压对平行架设线路挂接临时地线上的电磁感应分析  

Electromagnetic induction analysis of AC high voltage onparallel line erected temporary ground line

作　　者：李慧奇[1] 郭鑫[1] 刘勇 刘承志 李军 潘卓洪 Li Huiqi;Guo Xin;Liu Yong;Liu Chengzhi;Li Jun;Pan Zhuohong(Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense,North China Electric Power University,Baoding 071003,Hebei,China;State Grid Anhui Electric Power Co.,Ltd.,Hefei 230022,China;Baoding Jida Electric Power Design Co.,Ltd.,Baoding 071003,Hebei,China)

机构地区：[1]华北电力大学河北省输变电设备安全防御重点实验室,河北保定071003 [2]国网安徽省电力有限公司,合肥230022 [3]保定吉达电力设计有限公司,河北保定071003

出　　处：《电测与仪表》2021年第5期55-61,共7页Electrical Measurement & Instrumentation

基　　金：国家青年科学基金项目(51607129)。

摘　　要：平行交流特高压带电线路架线施工中,线路感应电情况十分复杂和严重,线路升空后主要经由杆塔临时接地线接地,施工中挂接地线过少会出现接地线熔断现象。基于电磁暂态分析软件建立了同塔双回交流带电线路以及平行架设的昌吉—古泉±1100 kV直流施工线路的模型,计算了施工线路多处接地线上的感应电压和感应电流,总结了不同接地方案下感应电压和电流的分布特性,分析了影响感应电压和电流的因素。通过现场试验验证了施工线路多处挂接地线的有效性。研究结果为平行特高压交流输电线路架线安全和施工线路接地方案提供了理论基础。In the construction work of parallel AC UHV live lines,the line induction is very complicated and serious.After the line is lifted,it is mainly grounded through the temporary grounding wire of the tower.If the number of grounding wires is too small during construction,the grounding wire will be blown.Based on the electromagnetic transient analysis software,this paper establishes the model of the double-circuit AC live line on the same tower and the Changji-Guquan±1100 kV DC construction line set up in parallel,and calculates the induced voltage and induced current on multiple grounding lines of the construction line.The distribution characteristics of induced voltage and current under different grounding schemes are analyzed,and the factors affecting the induced voltage and current are analyzed.The effectiveness of multiple grounding lines on the construction line was verified by field tests.The research results provide a theoretical basis for parallel UHV AC transmission line safety and grounding scheme of construction line.

关 键 词：架线施工 杆塔接地电阻 多处接地 感应电压 感应电流 临时接地线 

分 类 号：TM75[电气工程—电力系统及自动化]