一次主变送电的异常跳闸分析

caoyao130

一次主变送电的异常跳闸分析
杨继业
(沈阳超高压局，辽宁沈阳11 0003)
摘要：500 kV辽阳变电站2号主变压器在送电过程中发生两次充电保护动作跳闸，通过对保护动作情况、故障录波装置的
分析及当时系统负荷的调查，用试验仪重新模拟故障对充电保护进行试验，通过反复试验和大量计算，并对事故过程、检验
条件、试验方法及试验结果综合分析，发现充电保护之所以动作是由于主变二次侧合环时系统电流中含有大量直流分量造成
的。
关键词：保护；跳闸；直流分量
Causes analysis about the main transformer breaker tripping
YANG Ji—ye
(Shenyang Supertension Bureau，Shenyang 110003，China)
Abstract： The charge protection operation of the 2 main transformer of Liaoyang 500 kV substation happened two times during
the electricity transmission．Through analysing and investigating the circumstances of protection operation，the stoppage record
electricwave insallation and the system of elec仃ic charge at that moment．We tried to imitate the effection,which the stoppage brings
to the charge protection by using the experiment equipment again．By testing repeatly，caculating a vast amount of data and
analysing comprehensivly the course of accident，the method of test and the result of test．it found the reason that all breaker of the
main transform er was taking Off when the breaker of the main transformer middle side closed．It was because the charge protection
electric current contained a large of DC component．
Key words： protection；tripping；DC component
中图分类号： TM732 文献标识码：B 文章编号： 1674-3415(2010)04-0137-03

gtwangdapeng

辛苦啦谢谢楼主。

sasaxyxf

辛苦啦谢谢楼主。