摘要
目前在220 kV及以上设备开展带电作业时,可以采用地电位、中间电位和等电位三种作业方式。分析研究了220 kV电缆终端塔上的终端绝缘子在三种带电作业方式下的人体体表电场,研究结果表明:由于手部为人体尖端,几种作业方式下手部电场最大;中间电位作业在1.0 m以上作业时体表电场不超出240 kV/m;等电位作业体表电场超出人体能承受的最大电场,需做好安全防护。
At present, three kinds of operation methods can be used in the live working of 220 kV and above equipment, such as ground potential, intermediate potential and equal potential. Therefore, the human body surface electric field of the terminal insulator on the terminal tower of 220 kV cable under three live operation methods is analyzed. The results show that the electric field of the hand is the highest under several operation modes because the hand is the tip of the human body. When the intermediate potential operation is above 1m, the body surface electric field shall not exceed 240 kV/m. If the surface electric field of equipotential operation exceeds the maximum electric field that human body can withstand,safety protection should be done.
作者
何光华
齐金龙
卞栋
王兴宇
葛伟康
HE Guanghua;QI Jinlong;BIAN Dong;WANG Xingyu;GE Weikang(State Grid Wuxi Power Supply Company,Jiangsu Wuxi 214000,China;School of Electrical and New Energy,Three Gorges University,Hubei Yichang 443002,China)
出处
《电工材料》
CAS
2022年第3期74-77,共4页
Electrical Engineering Materials
关键词
带电作业
电缆终端
体表电场
cable terminal
live working
electric field on body surface
