500kV(210036):500kV,。:;;:TM401+.1:B:1001-8425(2009)09-0039-03DeterminationofOverloadLimitof500kVTransformerYANGXiao蛳ping(JiangsuElectricPowerTest&ResearchInstitute,Nanjing210036,China)Abstract:Theovercurrentabilityof500kVtransformerandtheprimarydeviceisanalyzed.Theoverloadlimitoftransformerisdetermined.Keywords:Transformer;Overloadoperation;Limit1,。,,,。,,,,。,0.81.530min。,,,。,,,、、。500kV,,35kV,,,220kV。22.1,1.5,。(),。GB/T15164-1994《》DL/T572-1995《》,,。。:(40℃);,(140℃)。,GB/T15164-1994,,。,[1]。:500kV46920099TRANSFORMERVol.46SeptemberNo.9200946、,、,,,。、,,。,、,。,,、,,,。,,,。2.2,IN±2%,,,1.5,1.5。,1000MVA500kVOIP-550/1600(500kV,1600A)、GOE1675-1300-2500(500kV,2500A)、OIP-252/4000(220kV,4000A)、GOE1175-850-5000(220kV,5000A),。2.31.2。,1.251.5。UI3204-300-06050D(1000MVA,,3200A)、RI3000-300/C-1019P(750MVA,,3000A)、UI2403-245-12050D(750MVA,,2400A)、TC5S1500-400(750MVA,,3000A),1.25。3,1.5。750MVA3150A,1000MVA4000A,。,,1.2。,、,80%。,,,。,220kV2500A、3150A4000A。1.5,2500A500MVA,3150A750MVA,4000A1000MVA。4120%、150%200%,,,1.2。,2500A(500MVA)、3200A(750MVA)、4000A(1000MVA),1.5。5、、、。,,,。,30、7%~10%。,,70℃,,,,。,,,,,,,。、40500kV91Table1Limitvaluesofcurrentofleadwires/A0.5m/s,40℃2LGJQT-140032082LGKK-90025002NAHLGJQ-14404565,《》,DL/T5222-2005《》,70℃,80℃。,0.1W/cm2,0.5m/s。1。1,1000MVA(2510A),2LGJQT-1400,1.5(1.5×2510A=3765A);750MVA(1883A),2LGKK-900,1.5(1.5×1883A=2825A)。6750MVA500kV(500/(230±9×1.33%)/36kV,)。2220kV。2,(、)1.5,(2500/1883≈1.3),,1.3。7,,。,,,,。,,,。:[1],.500kV[J].,2008,45(3):13-15.1.3/MVA750/A1883/A3000×1.22LGKK-900/A/A25004000×1.2400025001.5/A31502220kVTable2Overcurrentabilityof220kVsidedeviceandmaintransformer::,。:2008-07-04:(1980-),,,,。≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈11“”2008,11(2008)“”,。,———、、,35%、45%、10%10%,,100“”。,,2001,5600。69,430,59。400020089.4,4.35。41