配电网中性点接地方式对人身的影响及防范方法研究  

Influence of Distribution Network Neutral Grounding Mode on Human Beings and Its Preventive Measures

作　　者：毛兴华 禹荣勋 罗俊 MAO Xinghua;YU Rongxun;LUO Jun(State Grid Hengyang Power Supply Company,Hunan Electric Power Co.,Ltd.,Hengyang 421000,Hunan Province,China)

机构地区：[1]国网湖南省电力有限公司衡阳供电公司,湖南衡阳421000

出　　处：《电力与能源》2020年第2期200-204,共5页Power & Energy

摘　　要：随着电力产业的快速发展,配电网高压触电所引起的人身伤亡事故随之增多,研究减少人身触电伤害事故,保证人身安全有重大意义。首先分析了引起配电网触电伤亡的主要原因,其次结合理论计算、MATLAB软件及漯河10 kV真型试验场的现场试验分析了不同接地方式人身触电故障处理存在的问题,检验了消弧线圈接地选线装置和小电阻接地选线装置高阻识别能力等,最后提出了利用接地故障转移装置来处理人身触电问题。通过计算结果表明:通过转移故障点电流,钳制故障点电位可实现故障快速隔离,人体可以摆脱带电体,在一定程度可以降低人身触电死亡率。With the rapid development of the power industry, the number of human casualties caused by the high-voltage electric shock of the distribution network increases accordingly. Therefore, it is of great significance to study the reduction of personal electric shock injuries and ensure personal safety. Firstly this paper explores the main reasons for distribution network electric shock injuries, then combined with the theoretical calculation, MATLAB software and Luohe 10 kV field test, it analyzes the electric shock fault handling problems in different grounding methods, arc suppression coil grounding modes, small resistance grounding modes, and examines the arc suppression coil grounding line selection device and small resistance grounding line selection device high resistance identification capability, et al. Finally, considering that the three neutral grounding methods commonly used in distribution network can not guarantee personal safety and handling of personal electric shock fault, a ground fault transfer device is proposed to handle the problem of personal electric shock. As the calculation results show, transferring the current of the fault point and clamping the potential of the fault point can realize fast fault isolation, and the human body can get rid of the charged body, which can reduce the electric shock mortality in a certain degree.

关 键 词：高压触电 接地选线装置 高阻识别 中性点接地方式 人身安全 

分 类 号：TM862[电气工程—高电压与绝缘技术]