牵引变压器差动保护误动作分析  

Analysis of Differential Protection Misoperation of Traction Transformer

作　　者：王帅 谭鑫磊 刘文鼎 Wang Shuai;Tan Xinlei;Liu Wending

机构地区：[1]南京铁道职业技术学院

出　　处：《变频器世界》2019年第12期112-115,共4页The World of Inverters

基　　金：南京铁道职业技术学院大学生创新训练计划项目(YXKC201940)。

摘　　要：本文通过对宁安高铁某牵引所空载合闸时牵引变压器差动保护误动作的案例分析,查找故障原因,对保护装置定值、故障跳闸报告、录波、变压器本体检查及试验分析,确认是由于空载合闸时励磁涌流引起主变差动保护,并总结分析经验,在原有二次谐波制动闭锁保护的基础上增加波形间断角继电器综合判据。Based on the case analysis of the differential protection misoperation of traction transformer in a traction substation of Ning’an high speed railway when no-load closing, this paper finds out the cause of the fault, and confirms that the main transformer differential protection is caused by the inrush current when no-load closing through the inspection and test analysis of the protection device setting, fault trip report, wave recording, transformer body, and summarizes the analysis experience. On the basis of the dynamic blocking protection, the comprehensive criterion of the waveform intermittent angle relay is added.

关 键 词：牵引变压器 比率差动保护 闭锁 励磁涌流 

分 类 号：TM922.73[电气工程—电力电子与电力传动]