220 kV同塔双回钻跨一体线路带电作业人体体表场强分析  

Analysis of Live Operator’s Body Surface Field Strength of 220 kV Drilling and Spanning Tower with Double⁃circuit Transmission Line

作　　者：盛金马 李鸿鹏 张丹丹[2] 蔡翔 严波 夏新运[4] 黎彬 SHENG Jinma;LI Hongpeng;ZHANG Dandan;CAI Xiang;YAN Bo;XIA Xinyun;LI Bin(State Grid Anhui Economic and Technical Research Institute of Electric Power,Hefei 230081,China;State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Huazhong University of Science&Technology,Wuhan 430074,China;State Grid Anhui Electric Power Company,Hefei 230041,China;Anhui Huadian Engineering Consulting Designing Company,Hefei 230601,China)

机构地区：[1]国网安徽省电力有限公司经济技术研究院,合肥230081 [2]华中科技大学强电磁工程与新技术国家重点实验室,武汉430074 [3]国网安徽省电力有限公司,合肥230041 [4]安徽华电工程咨询设计有限公司,合肥230601

出　　处：《高压电器》2022年第8期252-258,共7页High Voltage Apparatus

摘　　要：钻跨塔是为解决输电线路中出现的连续钻跨问题的一种新型杆塔,为保证钻跨塔上带电作业人员的人身安全,文中对钻跨塔带电作业人员体表场强进行了研究。文中以220 kV同塔双回钻跨一体输电线路为研究对象,建立了人体和输电线路的仿真模型。考虑钻跨一体杆塔的钻越导线、跨越导线、沿塔身的垂直导线对电场分布的影响,同时考虑不同典型带电作业位置处人体不同姿势对人体体表场强的影响,对典型带电作业位置处的人体体表场强进行了计算。计算结果表明:等电位处作业时人体体表场强最大值为1270 kV/m;由于存在沿塔身的垂直布线,地电位处人体表面场强最大值也高达738 kV/m。等电位和地电位处的工作人员均需穿戴屏蔽效率为40 dB的屏蔽服。计算结果对带电作业人员的电场防护具有一定的指导意义。Drilling and spanning tower is a new type of pole tower for solving the problem of continuous drilling and spanning in transmission line.For assuring the personnel safety of the live operators working on the drilling and span⁃ning tower,the electric field strength on the body surface of the liver operators working on the drilling and spanning tower is studied.In this paper,the 220 kV transmission line with the same tower and double circuit drilling and span is taken as the research object and the simulation model of human body and transmission line is set up.Considering the influence of drilling wire,crossing wire and vertical wire along the tower of the drilling and spanning tower on the electric field distribution and,at the same time,considering the influence of different postures of human body on the surface field strength of human body at different typical electrified working positions,the surface field strength of hu⁃man body at typical electrified working positions is calculated.The calculation results show that,in case of operation at equipotential position,the maximum value of the surface field strength of human body is 1270 kV/m.Due to the vertical distribution along the tower,the maximum value of body surface field strength at ground potential is also as high as 738 kV/m.Operators at equipotential and ground potential should wear shielding suits with shielding efficien⁃cy of 40 dB.The calculation results have certain guiding significance for electric field protection of live operators.

关 键 词：220 kV同塔双回 钻跨一体杆塔 垂直导线 带电作业 体表场强 

分 类 号：TM84[电气工程—高电压与绝缘技术]