±500kV直流输电系统接地极线路进入等电位的路径研究  

Research on Path of Grounding Electrode Line into Equipotential for ±500 kV DC Transmission System

作　　者：侯新文 董晓虎 程绳 杜勇 范杨 吴军 葛雄 HOU Xinwen;DONG Xiaohu;CHENG Sheng;DU Yong;FAN Yang;WU Jun;GE Xiong(Maintenance Company,State Grid Hubei Electric Power Co.,Ltd.,Wuhan Hubei 430050,China)

机构地区：[1]国网湖北省电力有限公司检修公司,湖北武汉430050

出　　处：《湖北电力》2019年第5期20-26,共7页Hubei Electric Power

摘　　要：500 kV直流输电系统接地极线路塔头尺寸和窗口间隙小,常规超特高压输电线路进入等电位的方式无法照搬应用。为此,介绍了±500 kV直流输电系统接地极线路几种可用的等电位进入方式,并从安全性、工器具、作业人员数量、工作强度等角度重点对绝缘软梯法进入路径进行对比分析。研究表明:对于±500 kV直流输电系统接地极线路带电作业时,耐张塔地线悬挂绝缘软梯向下法、直线塔横担悬挂绝缘软梯摆入法进入等电位安全可靠、便捷省力。The grounding electrode line of ±500 kV DC transmission system has small-sized tower head and small window gap,thus the equipotential mode of the conventional UHV transmission lines can not be copied. In view of this,the present paper introduces several kinds of equipotential entry modes available for grounding electrode line of ±500 kV DC transmission system,and also emphatically makes a comparative analysis on the entry path of insulated flexible ladder method from such perspectives as safety,tools and instruments,the number of workers,working intensity and so on. The results show that in the case of live working on the grounding electrode line of ±500 kV DC transmission system,in order to realize equipotential,it is safe,reliable,convenient and labor-saving for tension tower ground wire to adopt the method of hanging insulated flexible ladder downward,and for tangent tower cross arm to use the method of hanging insulated flexible ladder swinging-in.

关 键 词：特高压 ±500kV直流输电 接地极线路 绝缘软梯 带电作业 等电位 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM77