1,1,2(1.1100252.110179):,。:;;:TM401+.1:B:1001-8425(2009)11-0015-03ProposalsforShortCircuitImpedanceDistributionofThree-WindingTransformerinElectricNetworkSUNShu蛳bo1,LIPei蛳guo1,XIANGYang2(1.TBEAShenyangTransformerGroupCo.,Ltd.,Shenyang110025,China;2.ShenyangTransformerResearchInstitute,Shenyang110179,China)Abstract:Thebasicrelationofshortcircuitimpedancesofthree-windingtransformerisdis-cussed.Theproposalsformatchofthreeshortcircuitimpedancesofthetransformerarepresented.Keywords:Transformer;Winding;Shortcircuitimpedance1,。,,。,,,,,。,,,。、。2(,)1,。1,12Z12、23Z23、13Z13。(),,:Z13=K(Z12+Z23),K。3211()Fig.1Windingarrangementofcommontransformerwiththreewindings(underratedcondition)4611200911TRANSFORMERVol.46NovemberNo.11200946220kV~750kV,K1.06~1.10,1.10。Z13=(Z12+Z23)Z13<(Z12+Z23),1,12,12,,、、、、,。,,Z13=K(Z12+Z23),K1.1,。,。323,12,3,Z13、Z12、Z23。23,。3,23Z23′Z23:Z23′=S3S2Z23S3———3S2———2,,:Id=100IrZ+ZxId———Ir———Z———Zx———,,,。,。,,,23Z23,,23。,Z23Z23′4%。,250MVA,、250MVA,50MVA,12%,15%,29%。50MVA3.75%,4%,。,26.6。,,,,。,,,,23Z234%,。4,500kV,220kV。500kV20,,,,500kV。220kV80,GB/T6451《》。30,,220kV,,。,,,GB/T6451,。,20kA,。,,220kV,,。5,,。,,,16、、11,。,,,。,,,,,,。6Z12、Z23、Z13,,。,,。,。Z12、Z23、Z13,,,,。,Z12=12%、Z23=25%、Z13=40%,,,。Z12=15%、Z23=25%、Z13=44%,,12,,。Z12=12%、Z23=30%、Z13=46%,,23,,。,。,,Z12、Z23、Z13,,。7,,,,,,。,。,。,,,,,、。:[1],,,.[M].:(),2002.[2].[M].:,2003.[3].[J].,1997,34(10):18-22.[4]GB/T6451-2008,[S].:2009-05-22:(1964-),,,,;(1973-),,,,;(1964-),,,,。:2008-10-16:(1952-),,,,。:[1].[M].:,2005.[2].[M].:,2005.[3],,,.[M].:,1990.[4].、[J].,2005,(9):7-12.(6)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!17