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(516001):,。:;;:TM406:B:1001-8425(2009)02-0059-04DiscussionofTemperatureMeasurementDefectinMainTransformerWEICai-meng(HuizhouPowerSupplyBureau,Huizhou516001,China)Abstract:Thestructureandprincipleofmaintransformertemperaturemeasurementcircuitaredisscussed.Thedefectsareanalyzed.Keywords:Transformer;Temperaturemeasurementcircuit;Defect1,,。,。20074,2,。,,2,。2,,1。1,①:,(、)。②:,(4mA~20mA)。③:,(4mA~20mA)。④:。⑤:,DC。⑥:,4mA~20mA,24VDC。2。,,、,,,、1①②③④⑤⑥①Fig.1Structureoftemperaturemeasurementcircuitinmaintransformer46220092TRANSFORMERVol.46FebruaryNo.2200946。,55℃,,;85℃,;105℃,,,。3200716《》,20074,2,。,,3。24℃~50℃,19%~23%,21%,,。,2,,,4。4,10℃,83.3%,。,、,1。1,、。3,、,,、。4(1)。5。,2,DZ02-45、DZ02-46。,“”DZ02-45、DZ02-46DZ02-37、DZ02-38。,,,DZ02-45、DZ02-46,。,,,6。(2)。7,,,2Fig.2Principlediagramoftemperaturemeasurementcircuitinmaintransformer2523211917242628303234384042444648503620%21%20%19%21%22%20%23%19%22%22%21%20%21%蛐%蛐℃3Fig.3Temperaturemeasurementerrorcurvesofmaintransformerofdifferenttemperature1260蛐℃1083.3%91.6%95.8%10050010.50.5蛐%4Fig.4Influenceoftemperaturedifferencesofelementtomaintransformertemperaturemeasurementerrors11,,。2,,0.9mA,0.2mA;0.9mA5.5℃,,。3,,0.8Ω,0.2Ω。,0.8Ω3℃。Table1Reasonanalysisoftemperatureerrorsofthermometer6023;,3。,,9。,“64”。8。,,0.2mA,,。(3)。,0.5Ω,0.2Ω。,,。,RI、1ΩU,9。U、I,,。,,,2。2,R0.15Ω,。,,,5.9%~6.5%,。。5、5Fig.5Flowprocessdiagram6WJ1236DZ02B3738PIDZ013435HVCT-4(a)WJ12DZ02BHVCT-4DZ01PI35344546(b)36Fig.6SecondaryconnectionbeforeandafterrepairK1K2K3A1A2B1B2C1C2R1R2R37Fig.7ConnectiondiagraminthermometerK1K2K3A1A2B1B2C1C2R1R2R38Fig.8Connectiondiagramoftemperaturecontrolpointafterconnectionchange30201000.40.60.811.21.41.51.11.30.50.70.9I蛐AU蛐V9Fig.9Curveofadjustmentresistanaceandheatingcurrent(66)6146、。,,。:[1],,.[J].,2007,33(1):165-168.[2],,,.[J].,2004,24(8):48-52.[3],,,.[J].,2005,25(3):110-113.[4],.[J].,2003,22(2):51-54.[5],,.[J].,2004,30(7):34-36.[6].[J].,2005,21(6):78-79.[7]VartolettiC,DesiderioM,DiDCarlo,etal.Vibro-a-coustictechniquestodiagnosespowertransformers[J].IEEETrans.PowerDeliv.,2004,19(1):221-229.[8],,,.[J].,2000,20(10):46-54.[9],,,.[J].,2002,24(1):58-60.[10],,,.[J].,2002,22(8):53-56.[11]RoyN,PurkaitP,BhattacharyaK.ApplicationofwaveletandFouriertransformforvibrationanalysisofmotor[C].IEEEInduction2005conference,Chennai,India,2005,609-613.[12]KangPJ,BirtuhistleD.Conditionassessmentofpowertransformeron-loadtapchangersus-ingwaveletanalysisandself-or-ganizingmap:fieldevaluation[J].IEEETrans.PowerDeliv.,2003,18(1):78-84.[13],,,.[J].,2006,32(7):49-53.[14],,.[J].,2005,25(22):158-162.[15],,.[J].,2005,42(6):6-9.[16],,,.MATLAB6.X[M].:,2004.:2007-08-23:(1978-),,,;(1968-),,,,、。!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!,2,,“”、“64”,,,。:[1],.[M].:,1998.[2].[J].,2005,31(6):80-83.[3],.[J].,2007,44(8):64-65.:2008-05-13:(1977-),,,,。2蛐℃蛐Ω蛐Ω蛐Ω蛐Ω1021.90.11465.80.20.1518109.90.1221414.20.2261817.90.1302221.80.2Table2Matchedresistancesafterparameteradjustment(61)66
本文标题:主变压器测温缺陷的探讨
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