特殊工况下超高压输电线路等电位作业体表场强分布及安全性评估  

Electric Field Intensity Distribution and Safety Assessment of EHV Transmission Lines Equipotential Work under Special Working Conditions

作　　者：秦威南 郭云鹏 汤春俊 张召亮 QIN Weinan;GUO Yunpeng;TANG Chunjun;ZHANG Zhaoliang(State Grid Jinhua Power Supply Company,Jinhua,Zhejiang 321001,China;State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310007,China;Wuhan KEDIO Electric Power Technology Co.,Ltd.,Wuhan 430223,China)

机构地区：[1]国网金华供电公司,浙江金华321001 [2]国网浙江省电力有限公司,杭州310007 [3]武汉科迪奥电力科技有限公司,武汉430223

出　　处：《南方电网技术》2022年第12期134-141,共8页Southern Power System Technology

基　　金：国网浙江省电力科技有限公司科技项目(5211JH2000RU)。

摘　　要：为了提高供电可靠性,如今越来越普遍的开展带电作业,然而对于特殊工况(带避雷器)输电线路上的安全进入等电位路径方面,国内外相关研究鲜有报道。利用有限元分析软件建立了带避雷器输电线路带电作业进入等电位的计算模型,以500 kV超高压带避雷器输电线路的常见ZB1型塔为例,对安全进入等电位路径进行分析,以作业人员进入等电位的可能路径为研究对象,对作业人员在不同位置时的体表电场进行了仿真计算,得到了作业人员从不同路径进入等电位中体表场强的变化规律;通过对人体头顶、胸口、手部、膝盖、脚部场强的对比分析,提出作业人员在两类工况下,沿导线斜上方路径安全进入等电位最为合适。In order to improve the reliability of power supply, it is more and more common to carry out live work. However, there are few reports on the safe access to the equipotential path on the transmission line under special conditions(with lightning arrester). This paper uses finite element analysis software to establish a calculation model for the equipotential entry of the transmission line with lightning arrester for live work. Taking the common ZB1 tower of the 500 kV EHV transmission line with arrester as an example, the safe access to the equipotential path is analyzed, and the operator enters The possible path of equipotential is the research object. The surface electric field of the operator at different positions is simulated and calculated, and the change law of the surface field strength of the operator entering the equipotential from different paths is obtained;The comparative analysis of the field strength of hands,knees, and feet suggests that it is most appropriate for operators to enter the equipotential safely along the diagonally upward path of the conductor under the two types of working conditions.

关 键 词：500 kV输电线路 带电作业 避雷器 进入等电位 电场强度 

分 类 号：TM8[电气工程—高电压与绝缘技术]