主变压器本体保护误动的原因分析.pdf

!#$%%&’()*+%,-.’20063115,(,545002)$%,,,&$%’’$%TM403.5$%B$%1006-6764(2006)03-0005-02!#$%$&’()$*$+,-*$+.%/0*+’+,1/+0%20*+’+,-*’3/’$,+/4%/WANGYong-jun,DONGJin-cheng!#$%&’()*+,-./0#.1&#)23*%%’4&#.56#7,,-./0#.+4.()89-:;:=+60-)($&5$0/20%ThecausesofmisoperationoftherelaysinprotectingdevicesofthemaintransformerduringearthingoftheDCsystemwereanalyzed.Itshowedtheimportancetoselecttypesoftheprotectingdevices.Theimprovementmethodswereputforwardtoavoidsuchaccidentsofmisoperation.$6%)7+/8$%transformer;protection;accident12004831,220kV1Y,’(,&&Z[10,,27\&,1Y,1Y,,,3.3ms,3.3ms&2,,1Y,,&)((,’,’,,,’,&,,)3.3ms,3.3ms&),,,’,,,5.5ms(7ms13ms,5.5ms3.3ms,3.3ms,,&3,,,&,((,&,,*+,,)(5!#$%%&’()*+%,-.’2006311551,。,,。6《》,《》,。:2005-11-10:(1971-),,,,。,,,,,。,24V,TS2-24,:12V100%,8～10ms,0.14W。:220V,;,12V;,0.14W。4,,TS2-24JZX-39FA,220(10)411-4,220V,0.8W。,。24V,。1、2。125D285D85LP1514ZJ1_220VZJ1-1ZJ5-1ZJ4-1ZJ3-1ZJ2-1ZJ6-165LP75D2912126