摘要
介绍了某变电站发生的一起误操作事故情况,通过不同的角度对电气物理量进行分析,讨论了引起保护误动作原因,主要是由于主变各侧电流引入有误,且运行人员擅自改变操作顺序。并根据继电保护装置在这次事故中的动作情况,提出在主变引出线可不采取快速切除故障的情况下,宜采用主变各侧套管TA作为主变差动保护的二次电流回路构成差动测量。
A substation misoperation accident is introduced,and its cause is analyzed by discussing the electrical variables from different views. The input currents of main transformer’s all sides were incorrect and the operator changed the operating sequence without permission. According to the ac,tion of relay protection in this accident,it is suggested that:the bushing TA can be adopted as secondary current circuit of main transformer differential protection to realize the differential mea,surement when fault fast,clearing is not necessary in the outlet of main transformer.
出处
《电力自动化设备》
EI
CSCD
北大核心
2005年第7期99-101,共3页
Electric Power Automation Equipment
关键词
事故
继电保护
配置
分析
accident
relay protection
configuration
analysis
