配电网触电保护与中性点接地方式  

Electric Shock Protection and Earthing Methods of Distribution Networks

作　　者：徐丙垠[1] 李天友[2] 薛永端[3] XUBingyin LI Tianyou XUEYongduan(Smart Research Center of Shandong University of Technology, Zibo 255087,China Fujian Power Company, Fuzhou 350003, China Control and Information School of China Petroleum University （ East China）, Qingdao266580, China)

机构地区：[1]山东理工大学智能电网研究中心,山东淄博255087 [2]国网福建省电力有限公司,福建福州350003 [3]中国石油大学(华东)信息与控制工程学院,山东青岛266580

出　　处：《供用电》2017年第5期21-26,共6页Distribution & Utilization

基　　金：国家电网公司科技项目(52130416000D)~~

摘　　要：文章探讨了中压配电网人体触电与导线坠地的检测与保护问题,分析了高阻接地故障接地电流与零序电压变化特点,现有配电网接地保护技术与反映接地电阻的能力,以及配电网中性点接地方式对触电保护的影响,提出了提高接地保护反映接地电阻能力的措施,指出配电网采用小电流接地方式比小电阻接地方式,更有利于解决触电保护问题。The protection of electric shocks and downed lines of distribution networks is investigated. The zero sequence currents and voltages of high impedance faults （HIFs）, the HIF detection sensitivity of existing earth fault protection methods and the impacts of neutral earthing methods on the HIF protection are analyzed. The measures improving HIF detection sensitivity of is proposed. It is pointed out that the non-solidly earthed neutral has advantages over low resistance earthed neutral in term of HIF detection sensitivity.

关 键 词：配电网 人体触电 导线坠地 高阻故障 接地保护 

分 类 号：TM73[电气工程—电力系统及自动化]