双级矩阵变换器输入电压不平衡控制策略

284200910AdvancedTechnologyofElectricalEngineeringandEnergyVol.28,No.4Oct.2009:2009202221:(50607012):(19812),,,,;(19772),,,,,;(19472),,,P,,,,(,100084):(),,,,,,,,,,,,:;;:TM46:A:100323076(2009)04200062041,,1,,[1,2](Two2stagematrixconverter,TSMC)1RB2IGBT,TSMC[3]:,;,,;,1RB2IGBTFig.1TopologyofTSMCusingRB2IGBTPWM,;1,DdcCdc,,,,[4],[5],[6],,,,,2,SVPWM,,,,ij=Sjidcj=a,b,c(1),Sj=1,Sj=-1,Sj=0,I=ia+ibej2P3+ice-j2P3(2)(1)(2),I=idc(Sa+Sbej2P3+Sce-j2P3)(3)2Iref,Iref,2,m,TsPWMt1=mTssin(P2-)Psin(P3)t2=mTssin(-P6)Psin(P3)t0=Ts-t1-t2(4)2Fig.2Spacecurrentvectorofrectifier3SVM2I,I6(1,-1,0)uab,I1(1,0,-1)uac,PWMudc,udc=uact1+uabt2Ts=(ua-uc)t1+(ua-ub)t2Ts(5),,=it+(6)(4)(6)(5),udc=3mUmcos(7),Um,SVM,SVPWM,,€idc=MImcos(8),M,Im,SVM,,,,,,74,:,Pin=Pout=const(9),,SVPWM,,,,,SVM,(7),,SVPWM,,,,,SVPWM,,,(9),,,,,,,,ua=Upcos(it+)+Uncos(it+)ub=Upcos(it-2P3+)+Uncos(it+2P3+)uc=Upcos(it+2P3+)+Uncos(it-2P3+)(10),Up,Un,,ia=Ipcos(it+)+Incos(it+)ib=Ipcos(it-2P3+)+Incos(it+2P3+)(11)ic=Ipcos(it+2P3+)+Incos(it-2P3+),Ip,In,,,Pin=uaia+ubib+ucic(12)(10)(11)(12),Pin=1.5[UpIpcos(-)+UnIncos(-)+UpIncos(2it++)+UnIpcos(2it++)](13),cos(2it++)cos(2it++),,+=+UpIn=-UnIp(14),(11)SVM,,,,pq3,p,qp90,pq,3Fig.3Instantaneousactiveandreactivepowerinframepqupuq,upuq=cos(it)cosit-23cosit+23sin(it)sinit-23sinit+23uaubuc(15)up,uq,upuq=…up…uq+‰up‰uq,…up,828…uq,‰up,‰uq(10)(15),up=1.5[Upcos+Uncos(2it+)]uq=1.5[Upsin+Unsin(2it+)](16),,Up,(15),[uaucub],:up=1.5[Uncos+Upcos(2it+)]uq=1.5[Unsin+Upsin(2it+)],,Un,,,(14),Ip=1,UpUn(14)In,SVM,4,RB2IGBT[7,8],L=017mH,C=20F,abc0.6,4(a)(b)5(a)(b)4Fig.4Waveformandspectrumofinputcurrentunderunbalancedinputvoltage5Fig.5Waveformandspectrumofoutputcurrentunderunbalancedinputvoltage[6],,35,2,75Hz125Hz(150Hz250Hz)1,(75Hz,125Hz)21Tab.1Comparisonofmainharmonicsininputcurrent150Hz2.88%2.28%250Hz6.19%3.05%2Tab.2Comparisonofharmonicsinoutputcurrent75Hz4.73%2.01%125Hz2.69%2.47%4512,,,,,5,PWM,,,,,,,(65,cont.onp.65)94,:atthegrowingriseathomeandabroad.Thispaperdiscussesnetworkmodeof500kVdigitalsubstationandgivesthenetworkschemedebatedbymanyexpertsofvariousspecialitiesusing500kVHainingandLanxidigitalsubstationasexamples,andthat500kVLanxiisthefirstthree2tierarchitecture500kVsubstationbasedontheIEC61850digitalsubstation.AtthesametimethecasebasedontheRUGGEDCOMispresentedonthepaper.Keywords:500kVdigitalsubstation;networkmode;IEC61850(9,cont.fromp.9)(References):[1],,(ZhouDaning,LiuYadong,HuangLipei).RB2IGBT(Anovel22stepcommutationmethodinRB2IGBTbasedmatrixconverterdrivesystem)[J].(Adv.Tech.ofElec.Eng.&Energy),2006,25(3):124.[2],(SunYuping,XuFuyuan).(PLD)(Applicationofprogrammablelogicdevice(PLD)tomatrixconverter)[J].(Adv.Tech.ofElec.Eng.&Energy),2003,22(1):72276.[3]WeiLixiang,ChanH,LipoTA.Matrixconvertertopologieswithreducednumberofswitches[A].IEEEPESCp02[C],Cairns,Australia,2002.57263.[4]LixiangWei,YochiMatsushita,ThomasALipo.Investigationofdual2bridgematrixconverteroperatingunderunbalancedsource[A].IEEEPESC2003[C].Acapilco,Mexico,2003.129321298.[5]WijekoonT,KlumpnerC,WheelerP.Improvementofoutputvoltagecapabilityofatwostagedirectpowerconverterunderunbalancedinputvoltages[A].EPE2005[C].Dresden,2005.1214.[6],,,(SunKai,ZhouDaning,HuangLipei,etal.).(Analysisonmatrixconverteroperationinabnormalconditions)[J].(Adv.Tech.ofElec.Eng.&Energy),2004,23(2):9212.[7],,(LiGang,SunKai,HuangLipei).RB2IGBT(Rectifierforatwo2stagematrixconverterusingRB2IGBT)[J].(JTsinghuaUniv.),2009,49(1):37240.[8]GangLi,KaiSun,LipeiHuang.Anovelalgorithmforspacevectormodulatedtwo2stagematrixconverter[A].IEEEICEMS2008[C],Wuhan,China,2008.131621320.Controlstrategyoftwo2stagematrixconverterunderunbalancedinputvoltagesLIGang,SUNKai,HUANGLi2pei(StateKeyLabofSecurityControlandSimulationofPowerSystemsandLargeScaleGenerationEquipments,TsinghuaUniversity,Beijing100084,China)Abstract:Two2stagematrixconverter(TSMC,alsonamedindirectmatrixconverter)isanoveltopologyofmatrixconverters,whichisadirectthree2phaseACtoACpowerconversiondevice.IthasarealDClink,butwithoutenergy2storedcapacitororinductor.InputvoltageunbalanceinthesourceofTSMCcanimmediatelyreflecttotheoutputsideandloweritsperformance.Inordertoreducetheeffectofinputvoltageunbalance,acompensationmethodbasedoninstantaneousreactivepowertheoryisproposedinthispaper.Underunbalancedinputvoltages,theactivepowerofinputsideiscontrolledasconstant.Thepositiveandnegativesequencecomponentsoftheunbalancedinputvoltagesarecalculatedandtheinputcurrentreferencespacevectorisconstructed.TherectifierandinvertercanusespacevectorPWMalgorithmsrespectively.TheoutputperformanceofTSMCcanbestabilized.TheexperimentalresultsshowtheproposedmethodcanreducetheharmonicsofinputandoutputcurrentssoastoimprovetheperformanceofTSMC.Keywords:two2stagematrixconverter;unbalance;instantaneousreactivepower564,:500kVVLAN