特高压输电线路检修工况下感应电压与电流计算分析  

Calculation and Analysis of Induced Voltage and Current in Maintenance Condition of UHV Transmission Line

作　　者：闫可为 李伟 魏小龙 李新民 韩彦华 张璐 孔志战 YAN Ke-wei;LI Wei;WEI Xiao-long;LI Xin-min;HAN Yan-hua;ZHANG Lu;KONG Zhi-zhan(State Grid Shaanxi Electric Ultrahigh Power Co.,Ltd,Xi’an 710075,China;Electric Power Research Institute of State Grid Shaanxi Electric Power Co.,Ltd,Xi’an 710100,China;State Grid Shaanxi Electric Power Co.,Ltd,Xi’an 710048,China)

机构地区：[1]国网陕西省电力有限公司超高压公司,陕西西安710075 [2]国网陕西省电力有限公司电力科学研究院,陕西西安710100 [3]国网陕西省电力有限公司,陕西西安710048

出　　处：《电工电气》2023年第8期30-34,共5页Electrotechnics Electric

摘　　要：针对特高压输电线路在检修工况下因受同塔或临近运行导线的影响,面临严重的电磁感应问题,建立了检修导线挂接地线前的感应电压及挂接地线后的感应电流计算模型,定量地研究了输送功率、并行长度、并行间距、杆塔接地电阻等参数对上述感应电压及感应电流的影响规律和影响程度,并建立±1100 kV吉泉线的实际工况模型,计算分析了吉泉线在检修工况下沿线的感应电压、感应电流幅值和分布规律。研究结果为特高压输电线路的检修作业,以及特高压输电线路检修用消弧接地线的参数选型提供了依据。UHV transmission lines have serious electromagnetic induction problems under maintenance conditions because of the effects of the same tower or adjacent operating wires,so the paper builds a model to calculate the induced voltage before hanging the grounding wire and the induced current after hanging the grounding wire.It analyzes the influence rule and influence degree of the parameters such as transmission power,parallel length,parallel spacing and tower grounding resistance on the induced voltage and induced current in a quantitative way.Then,the actual working condition model of±1100 kV Jiquan transmission line is established to analyze its amplitude and distribution of induced voltage and induced current under maintenance conditions.The research results can provide a basis for the maintenance of UHV transmission lines and the parameter selection of arc suppression grounding wires used for maintenance.

关 键 词：特高压输电线路 电磁感应 输送功率 并行长度 并行间距 杆塔接地电阻 

分 类 号：TM726.1[电气工程—电力系统及自动化]