基于一起跳闸事件的变压器间隙零序保护分析  

Analysis of Transformer Clearance Zero Sequence Protection Based on a Trip Incident

作　　者：张侃君[1] 汪辰[2] 陈理[3] 夏勇军[1] 陈磊 王婷[1] 

机构地区：[1]湖北省电力公司电力试验研究院,湖北武汉430077 [2]国家电网公司华中分部,湖北武汉430077 [3]湖北省电力公司,湖北武汉430077 [4]湖北中兴电力试验研究有限公司,湖北武汉430077 [5]湖北省电力公司博士后科研工作站,湖北武汉430077

出　　处：《湖北电力》2012年第4期16-18,57,共4页Hubei Electric Power

摘　　要：文章通过一起220kV变压器跳闸事件,对变压器间隙零序保护的动作行为和性能进行了分析,指出变压器间隙零序保护现有整定方法存在的缺陷,有可能导致变压器的不必要跳闸。文中提出了保护整定计算的改进措施,该措施可在确保变压器安全的基础上有效减少变压器的不必要跳闸,提高供电可靠性。In the paper,the operating behavior and performance of transformer clearance zero sequence protection are analyzed by a 220 kV transformer trip incident.The analysis results show that the present setting calculation method of transformer clearance zero sequence protection has defects,it may lead to transformer unnecessary trip.According to the defects,the improvement measures of setting calculation method are proposed,the measures could reduce the probability of transformer unnecessary trip on the basis of transformer＇s safety,then the power supply reliability could be improved.

关 键 词：变压器 跳闸 间隙零序保护 接地故障 

分 类 号：TM862[电气工程—高电压与绝缘技术]