基于电力电子技术有载调压变压器的无冲击调压方法

,(,430072):,,,,,:;;;;:TM423:2008211219;:20082032020,,,,,[122],,[3],[4],[526],,,,11,1Fig.1Transformermodel1,:u2=RLi2+LLdi2dtu1-e=R1i1+L1di1dte=R2i2+L2di2dt+u2i1=i2+i0io=f(e)(1)(1)5,,,,,io,i21,i2,0,2[7211],,,9633102009525Vol.33No.10May25,2009[12213]2,,2Fig.2Equivalentmodelfornon2loadexperiment,,,N,:u=2Usint,U1,U2,,UN,I1,I2,,IN,P1,P2,,PN2.1ReU2I0R,Re,Re,Re:I0R,i=PiUii=1,2,,N(2):I0R,iNiReU2I0R,,(2),,Re,,Pi=220uii0R,idt(3):ui,Pii,U2I0R,U2I0R,(3):Pi=2i-1j=1arcsinUi-jUiarcsinUi-j-1Uiu2jRjdt+22arcsinUi-1Uiu2iRidt(4):Ri=Ui-Ui-1I0R,i-I0R,i-1,i(4)1,;(4)2,U2I0R,I0R,i,ReU2I0R,33U2I0RFig.3CurveofU2I0R2.2Le2I0L,:=-2Ucost/,N,:2U1/,2U2/,,2UN/,Re,:I20L,i=I2i-I20R,i(5):I0L,iiLe;IiiReIeI0RI0L,,2I0L,Re,,I2i=10(i0R,i+i0L,i)2dt=220i20R,idt+220i20L,idt(6)(6)1U2I0R,(6)2:20i20L,idt=ij=1arccosjiarccosj-1iI0L,j-1+I0L,j-I0L,j-1j-j-1(icost-j-1)2dt(7):I0L,jjLe;jjLe(7)I0L,j,Le2I0L072009,33(10)U2I0R2I0L,,u[Ui-1,Ui],i0:i0=I0R,i-1+I0R,i-I0R,i-1Ui-Ui-1U2sint+I0L,i-1+I0L,i-I0L,i-1i-i-12cost(8)U2I0R2I0L,i0=k12Usint+k22Ucost(9):k1,k2U2I0R2I0L3,U2I0R2I0L,(8)(1)i2,,(TLM)[14],,(1):ue,,(1):Asin(t+)=Bi2+Ddi2dt(10):Asin(t+)=2U(1-k1R1+k2L1)sint-k2R1+k1L1costB=R1+R2+RLD=L1+L2+LL(10):i2=AD2B2+D2sin(t+)-AB2B2+D2cos(t+)+Ce-DBt(11),0,,:i2(0)=AD2B2+D2sin-AB2B2+D2cos(12),,(12):A=2U,=0,B=RL,D=LL,i2(0)=-12UZLsin(13):ZL;(13):t=,4,MATLAB[15]:SN=20kVA;=10kV/0.48kV;R1=R2=0.012;L1=L2=0.0175;,,u=102sintkV,ZL=(10.368+j5.022),0.67,,,,i2=-25.685A4(a),4(b)4,,4Fig.4Currentwaveformoftransformerprimarysideinregulatingprocess5,,,,,:2kVA,11,10,0.97,3.08mH(20.6+j12.9)A,R,1R,R17,,,,,,,5,,5Fig.5Currentwaveformofprimaryside6,;()[1],,,..,2003,27(10):45248.LIXiaoming,HUANGJunjie,YINXianggen,etal.Researchofsmoothandnon2impactpowerelectronicsOLTC.AutomationofElectricPowerSystems,2003,27(10):45248.[2]ECHAVARRIAR,CLAUDIOA,COTOROGEAM.Analysis,design,andimplementationofafaston2Loadtapchangingregulator.IEEETransonPowerElectronics,2007,22(3):5272534.[3],,.2.,2006,30(7):55259.LIXiaoming,WANGWanqing,ZHANGShuichang.AnarclessOLTCmodelbasedonarm2bridgestructure.AutomationofElectricPowerSystems,2006,30(7):55259.[4],,..,2003,23(6):1702174.WANKai,LIUHuijin,CHENYunping.Researchonthenotransienceprocessofthetapchangeintheload2ratiovoltagetransformerconsideringtheferromagneticcharacteristic.ProceedingsoftheCSEE,2003,23(6):1702174.[5]GUERRAFCF,MOTAWS.Magneticcoremodel.IETScienceMeasurementTechnology,2007,1(3):1452151.[6],,..,2006,30(15):972102.WANGJinli,LIJinyuan,XULayuan.Schemeofarclesson2loadvoltageregulationfordistributiontransformerusinghighpowerelectronicswitch.AutomationofElectricPowerSystems,2006,30(15):972102.[7],..,1993,13(2):8213.ZHANGXiaoqing,WUHanwei.Calculationoftransientinpowersystemcontainingferromagneticelements.ProceedingsoftheCSEE,1993,13(2):8213.[8]ANNAKKAGEUD,MCLARENPG,DIRKSE,etal.AcurrenttransformermodelbasedontheJiles2Athertontheoryofferromagnetichysteresis.IEEETransonPowerDelivery,2000,15(1):57261.[9]PASQUALEM,BERTOTTIG.ApplicationofthedynamicPreisachmodeltothesimulationofcircuitscoupledbysoftmagneticcores.IEEETransonMagnetics,1996,32(5):423124233.[10]El2HAWARYME,SAIDMSN,BENBOUZIDMEH.Fittingsaturationandhysteresisviaarctangentfunctions.IEEEPowerEngineeringReview,2000,20(11):55257.[11]DELEONF,SEMLYENA.Completetransformermodelforelectromagnetictransients.IEEETransonPowerDelivery,1994,9(1):2312239.[12],,..,2006,40(10):111521119.RUANQuanrong,WANGLiang,SHIWei.Nonlineartransformermodelconsideringlosses.JournalofXianJiaotongUniversity,2006,40(10):111521119.[13],,..,2006,39(11):51254.HUTing,YOUDahai,JINMingliang.Non2linearmathematicmodelandsimulationoftransformerenergizationwithload.ElectricPower,2006,39(11):51254.[14]THOMASDWP,PAULJ,OZGONENELO,etal.Time2domainsimulationofnonlineartransformersdisplayinghysteresis.IEEETransonMagnetics,2006,42(7):182021827.[15],,,..,2006,32(1):65268.LIXiaomin,PIWeicai,LOUYin,etal.Methodofswitchingmutualrepulsivethyristorsswitchinthetap.HighVoltageEngineering,2006,32(1):65268.(1976),,,:E2mail:[e-mail](1955),,,,,:E2mail:[e-mail]272009,33(10)Non2inrushVoltageRegulatingMethodforOLTCTransformerBasedonPowerElectronicTechnologyHUANGJunjie,LIXiaoming(WuhanUniversity,Wuhan430072,China)Abstract:Anon2inrushvoltageregulatingmethodisproposedforonloadtapchangertransformerbyusingthepowerelectronicdevices.Inthismethod,thechangesofleakageresistanceandinductancecausedbythechangeofregulatingwiresaretakenintoaccount.Inordertoconsidertheferromagneticcharacteristic,theironcoreoftransformerismodeledasanonlinearresistanceandanonlinearinductance.Accordingtothedataofno2loadexperiments,thepiecewiselinearexpressionsusedtodescribethenonlinearcharacteristicareacquired.Bytheanalysisoftheequivalentmodeloftransformer,theexpressionstodeterminethenon2inrushmomentofregulatingprocessarederived.Iftheon2offcontroloftapchangerisconductedatthismoment,themacrocosmicvoltageischangedintermsofthedemandofsystemoperation;whilethewaveformofthemicrocosmiccurrentissmooth,continuousandnon2inrush.Theconventionalmethodthattheregulatingmomentisdeter