通过保护动作电流定位1000kV GIS故障点的实例分析  

Case analysis on Fault Location of 1 000 kV GIS by Protection Trip Current

作　　者：赵晓明[1,2] 余志慧 

机构地区：[1]华北电力大学,北京102206 [2]国网浙江省电力公司电力科学研究院,杭州310014 [3]国网浙江富阳市供电公司,浙江富阳311400

出　　处：《浙江电力》2014年第9期6-9,共4页Zhejiang Electric Power

摘　　要：某特高压交流变电站1 000 kV母线GIS设备因绝缘问题引起单相接地故障,而故障点的查找非常困难,通过保护动作报告和故障录波图对故障时母线保护动作行为进行了全面分析。利用故障时1 000 kV各断路器的短路电流分布大小和方向,给出了GIS设备排查区域,缩小了故障查找的范围,为快速查出故障点提供了有力的技术支持。A single-phase ground fault of 1 000 kV busbar GIS in an UHV AC substation occurred due to in- sulation. The fault point is hard to detect. The paper comprehensively analyzes protection action of busbar in case of the fault by protection action report and fault recording; By means of distribution magnitude of short- circuit current and its direction during the fault occurred, it suggests the detection area, narrowing the area of fault detection and providing strong technical support to fast detection of fault point.

关 键 词：1 000 KV 变电站 母差保护 短路电流 GIS 故障点 

分 类 号：TM862[电气工程—高电压与绝缘技术]