电力系统保护与控制2009，Vol.37Issue(14)：118-121,4.
UR T35/T60变压器差动保护误动分析
Analysis on mal-operation of UR T35/T60 transformer differential protection
方愉冬 1杨涛 2吴春娣3
作者信息
- 1. 浙江电力调度通信中心,浙江,杭州,310007
- 2. 浙江电力试验研究院,浙江,杭州,310004
- 3. 镇海发电厂,宁波,镇海,315208
- 折叠
摘要
Abstract
The paper analyzes fault data and protection setting during a mal-operation of UR T35/T60 transformer differential protection relay.Based on theoretical analysis of waveform character, possibility of sympathetic inrush resulting in mal-operation is ruled out, and conclusion is drawn that mal-operation was caused by differential protection's "2-out-of-3" 2nd harmonic restraint mode and TA transient saturation due to through-by inrush current.The corresponding solution of mal-operation is proposed on T35/T60 relay percent differential operating characteristic setting and 2nd harmonic restraint choice.关键词
主变差动保护/励磁涌流/CT暂态饱和/误动Key words
transformer differential protection/inrush current/CT transient saturation/mal-operation分类
信息技术与安全科学引用本文复制引用
方愉冬,杨涛,吴春娣..UR T35/T60变压器差动保护误动分析[J].电力系统保护与控制,2009,37(14):118-121,4.
