配电网故障分界技术应用情况分析与改进措施  

Analysis and Improvement to the Protection of Boundary Switches of Distribution Networks

作　　者：刘伟生 刘远龙 王安宁 徐丙垠[2] 

机构地区：[1]国网山东省电力公司,山东济南250001 [2]山东理工大学智能电网研究中心,山东淄博255049

出　　处：《供用电》2017年第3期57-61,共5页Distribution & Utilization

摘　　要：文章介绍了配电网分界开关实现故障分界、减少故障停电的作用及其工作原理;然后,指出了现场应用的短路故障分界技术存在整定以及与上下级保护配合不当的问题,并对此提出了改进措施;最后,分析了基于稳态零序电流的接地故障分界方法出现误动与拒动的原因,并指出可通过适当提高电流定值以及采用暂态零序电流幅值法解决误动与拒动问题。The principle and its role of the protection of boundary switches,which is installed at the joint of customer distribution systems and public distribution networks,are introduced.The problems on the setting and coordination of the interphase fault protection are described,and the improvement measures are proposed.The causes of mal-operation and failure to trip of the earth fault protection using steady state zero sequence current are analyzed.It is pointed out above problems of the earth fault protection can be overcome by properly increasing its operation current setting and using the transient zero sequence current.

关 键 词：配电网 故障分界 区内故障 区外故障 重合闸 接地故障 

分 类 号：TM72[电气工程—电力系统及自动化]