1000 kV输电线路耐张塔等电位带电作业电位转移电流计算  

Calculation of Potential Transfer Current for Equipotential Live Working of 1000 kV Transmission Line Tension Tower

作　　者：龙泉 王申华 冯平辉 黎鹏 吴田 普子恒[1,2] 方春华 LONG Quan;WANG Shenhua;FENG Pinghui;LI Peng;WU Tian;PU Ziheng;FANG Chunhua(College of Electrical Engineering&New Energy,China Three Gorges University,Hubei Yichang 443002,China;Hubei Provincial Engineering Technology Research Center for Power Transmission Line,Hubei Yichang 443002,China;State Grid Zhejiang Wuyi Electric Power Supply Company,Zhejiang Jinhua 321200,China;State Grid Zhejiang Huzhou Electric Power Supply Company,Zhejiang Huzhou 313000,China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]湖北省输电线路工程技术研究中心,湖北宜昌443002 [3]国网浙江省电力公司武义供电公司,浙江金华321200 [4]国网浙江省电力公司湖州供电公司,浙江湖州313000

出　　处：《高压电器》2024年第1期63-70,共8页High Voltage Apparatus

基　　金：国家自然科学基金(51807110);电网环境保护国家重点实验室开放基金项目资助(GYW51201901076)。

摘　　要：特高压输电线路等电位带电作业过程中会出现电弧放电,产生高幅值、高能量的脉冲电流,因此提出准确的转移电流计算方法对作业人员的安全防护具有重要意义。文中提出了基于电弧模型的电位转移电流计算方法,可对进入等电位的过程进行模拟。基于PSCAD平台建立了1000 kV输电线路耐张塔等电位带电作业电位转移电流计算模型,同时分析了进入等电位的方式及速度对转移电流的影响。仿真与实测结果基本一致,表明该计算模型能够有效反映电位转移电流的动态变化特性。采用软梯法获得的转移电流峰值更小,提高进入等电位速度,可有效降低电位转移电流幅值。Arc discharge occurs in the process of equipotential live working of UHV transmission lines,resulting in high amplitude and high energy pulse current.Hence,it is of great significance to propose an accurate calculation method of transfer current for safe protection of operators.A calculation method of potential transfer current based on the arc model is proposed in this paper,which can simulate the process of entering the equipotential.Based on the PSCAD platform,the calculation model of potential transfer current in equipotential live working of 1000 kV trans-mission line tension tower is set up.At the same time,the influence of entering the equipotential method and speed on the transfer current is analyzed.The simulation and measured results are basically identical,indicating that the calculation model can effectively reflect the dynamic change characteristics of potential transfer current.The peak value of transfer current obtained by the soft ladder method is smaller,and the amplitude of the potential transfer cur-rent can be effectively reduced by increasing the speed of entering the equipotential.

关 键 词：1000 kV 输电线路 等电位带电作业 电位转移电流 电弧模型 

分 类 号：TM75[电气工程—电力系统及自动化]