陈桥梁学习资料.pdf
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陈桥梁学习资料.pdf
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HighEfficiency/HighFrequencySingle-StageGrid-tiedPVinverter陈桥梁,Ph.D.技术总监西安龙腾新能源科技发展有限公司中国电源学会理事单位1中国电源学会2012电源创新技术论坛新能源、LED电源技术交流会(西安)OutlineIntroductiontoPVInverterTechnologiesParadigmBoost-BuckderivedSingle-stagePVinverterConclusion2ScenariooftheFutureGlobalEnergySupplyGlobalenergyusebysourceinthe21stcentury11GermanadvisorycouncilonglobalchangeWGBU3SustainableBuildingInitiativeLightingSolarPVWindTurbinePluginHybridwithBidirectionalConverterElectricEnergyManagementCenterHVACGridConnectionwithBidirectionalConverterEntertainmentandDataSystemsReference:
CPESpresentationfile4AnnualPVsysteminstallationsbyregion05,00010,00015,00020,00025,00030,00035,00040,000200920102011201220132014GlobalAnnualPhotovoltaicInstallations(Megawatts)RoWAsia*NorthAmerica*Europe*Germany*Slowing2012growthisduetocoolinginvestmentconditionsinGermanybythenSource:
isuppli5PVinstallationsin20102010Countrymarketsharefornewinstallations(MW)GermanyItalyUSACzechRepublicJapanFranceSpainChinaBelgiumOntarioKoreaUnitedKingdomGreeceBulgariaRestofWorldSource:
isuppli6PVInverterManufactures7GridtiedPVinverterDCInput:
WideinputvoltagerangeMaximumpowerpointtracking(MMPT)functionReversepolarityprotectionInsulationresistancedetectionLowvoltagerippleOV/UVprotectionHighreliabilityLowcostHighefficiencyEasyMaintenanceLownoiseLightweightEMCEasyuseACOutput:
TrueSinewaveoutputcurrentLowTHDhighPForspecificreactivepowerAntiislandingprotectionConformtospecificstandardsOV/UV/OF/UFprotectionGridSupport8PVInverter9TechnologyTrendsHigherefficiencyHigherpowerdensityLowercostMoreIntelligentNewapplication/standards?
InnovativePowerarchitecture/Topology?
Emergingpowerdevices(SiCetc.)?
Advancedpassivecomponents?
Improvedcontrol/diagnosis/sensingtechniques10ConventionalPVInverterPowerArchitectureTransformerless/SinglephaseDCDCDCACLINKC120550Vdc360Vdc230/220VacRegulatingDClinkvoltage(Boost,ZVTBoost,etc.)Inverter(H4,H5,H6,Heric,NPC)?
Wideinputvoltagerange?
TwopowerprocessingstageDCDCDCAC11TechnologyParadigmsEnphaseMicroinverter(isolated,singlephase)Refusol020KSCI(Nonisolated,threephase)Stecagrid3600(Nonisolated,singlephase)BoostBuckderivedsinglephasetopology(Nonisolated,singlephase)12EnphaseM215Singlephase/IsolatedDCinput:
MPPTvoltage:
22V36VMax.Input:
45VACoutput:
ACvoltage:
208V/240VRatedPower:
215WPF:
0.95Others:
Peakefficiency:
96.3%CECefficiency:
96%13EnphaseM215Reference:
Dr.LaisPresentationfile,VirginiaTech.14Refusol020KSCIReference:
PhotonMagazine,July2012SiCinside15Refusol020KSCIParametersThreephaseDCInputMax.Voltage:
1000VStartVoltage:
350VMPPTVoltagerange:
490V800VRatedPowerACOutputACVoltage:
400VLinetoLinePowerfactor(Cos):
0.9capacitive+0.9inductiveOthersWeight:
40kgNaturalconvectionTransformerless16Refusol020KSCITopologyVaNaSa1LaSa6Sa5VPVAVDCBSa2Sa3Sa4S1S2PhaseAPhaseBPhaseCRefusproprietarySinglephaseThreephase17Refusol020KSCIOperation
(1)VaNaSa1LaSa6Sa5VPVAVDCBSa2Sa3Sa4S1S2BuckVPV/2Va0Sa1Sa3&S1BuckSa6Alwayshigh18Refusol020KSCIOperation
(2)VaNaSa1LaSa6Sa5VPVAVDCBSa2Sa3Sa4S1S2BuckVPV/2Va0Sa1Sa3&S1BuckSa6Alwayshigh19Refusol020KSCIOperation(3)VaNaSa1LaSa6Sa5VPVAVDCBSa2Sa3Sa4S1S2BoostModeVPV/2Va0Sa1Sa3&S1Sa6Alwayshigh20Refusol020KSCIOperation(4)VaNaSa1LaSa6Sa5VPVAVDCBSa2Sa3Sa4S1S2BoostModeVPV/2Va0Sa1Sa3&S1Sa6Reactivepowerflow?
Alwayshigh21Refusol020KSCIFeaturesTimesharingoperationLowleakagecurrentLowinductorcurrentripple(Lowvoltagesecondproduct,lowcoreloss)HighefficiencyComplexcontrollogic22Refusol020KSCIEfficiencydiagramPeakefficiency:
98.6%(669Vinput,35%ratedpower)EUROmax=98.3%;CECmax=98.4%23Stecagrid3600Internalview40kHzswitchingfrequencySJMOSFET9kgweight24Stecagrid3600ParametersSinglephaseDCInputAbsoluteDCvoltagerange:
350V845VMPPVoltagerange:
350V700VACOutputACVoltage:
230V(185V276V)Powerfactor(Cos):
0.95capacitive+0.95inductiveOthersWeight:
9kgTransformerless25Stecagrid3600TopologyStecasproprietary26Stecagrid3600OperationConventionalBuckmodeVPVVa0S1S2S3&S6AlwayshighS4&S5Alwayslow27Stecagrid3600OperationConventionalBuckmodeVPVVa0S1S2S3&S6AlwayshighS4&S5Alwayslow28SigmaconverterparadigmReference:
CPESQuarterlyreviewfile,VirginiaTech.Feb,200829Stecagrid3600OperationTime/VoltagesharingBuckmodeVPVVa0S1S2S3&S6AlwayshighS4&S5AlwayslowVPV/230Stecagrid3600OperationTime/VoltagesharingBuckmodeVPVVa0S1S2S3&S6AlwayshighS4&S5AlwayslowVPV/231Stecagrid3600OperationTime/VoltagesharingBuckmodeVPVVa0S1S2S3&S6AlwayshighS4&S5AlwayslowVPV/232Stecagrid3600OperationTime/VoltagesharingBuckmodeVPVVa0S1S2S3&S6AlwayshighS4&S5AlwayslowVPV/233Stecagrid3600FeaturesSinglestagehighfrequencyTimesharingoperationLowvoltagestressLowleakagecurrentLowinductorcurrentrippleandlowcorelossHighfrequency/highpowerdensity/highefficiencyComplexcontrollogicSpecificinputvoltagerequirement(Vacpeak)Lowfrequencyripplepropagatesbacktosourcewithoutanybuffer.34Stecagrid3600EfficiencydiagramPeakefficiency:
98.6%(350Vinput,30%ratedpower)EUROmax=98.1%;CECmax=98.2%35SingleStagehighfrequencyPVinverterLC200500Vdc208or240VacLinefrequency?
Wideinputvoltagerange?
OnlyonehighfrequencypowerprocessingstageBoostorbuck36Ref.:
ZhengZhao,MingXu,QiaoliangChen,etc.“Derivation,Analysis,andImplementationofaBoostBuckConverterBasedHighEfficiencyPVInverter”.IEEETrans.onPowerelectronics,Volume:
27,Issue:
3,2012OperationmodeidentificationBuckmode:
VPVVo(t)Boostmode:
VPVVo(t)10buckD34010inboostVD37PWMSwitchModelofBoostModedDVcdI1()()()()()()()1121212111122211111111ESRsCDCRsCLCsESRsCDrDDCRsLDDCRsLESRsCDVIDrDDCRsLGeoLeid+=dDVcdI1ocLCLLCCLCLCCLLVVIIZZZZZZZZii=+=+=,11222222Where:
=+=+eLLCLCLCLCLcCLLLZiZiZidDVDiidIDi1122222111)(12ESRDCRre=38AnalysisofLoopGainforBoostMode100101102103104105106090180270360P.M.:
-150degFreq:
3.52e+004HzFrequency(Hz)Phase(deg)-60-40-200204060G.M.:
-39.2dBFreq:
1.05e+004HzUnstableloopOpen-LoopBodeEditorforOpenLoop1(OL1)Magnitude(dB)RHPzero:
LHPzero:
()111LDrDDCRIDVseLo+=111ESRCs=Doublepole:
122122LDLDrDDCRDDCRse+=Vin=200V,Vo=340VSinglepole:
ThedoublepoleandRHPzeromake270ophasedelay,hardtocompensate.Needacompensatorwhichcanmakethecrossoverhappenbeforedoublepole.HighdoublepolefrequencyandlowQareneeded.einDrDDCRDDCRV+122DCgain:
jLCLCDs211121+=39AnalysisofLoopGainforBoostMode100101102103104105106090180270360P.M.:
-150degFreq:
3.52e+004HzFrequency(Hz)Phase(deg)-60-40-200204060G.M.:
-39.2dBFreq:
1.05e+004HzUnstableloopOpen-LoopBodeEditorforOpenLoop1(OL1)Magnitude(dB)Vin=200V,Vo=340VItisdesirabletomovethedoublepoletowardhighfrequencybyreducingC1,L1andL2.ReducingL1canalsoreduceQReducingC1,willleadtohighQdesignC1bytradeoffbetweenfrequencyandQNeedtodesignbasedontheworstcondition,whichistheonewiththehighestQpk.ThesmallestDgivesthelowestdoublepolefrequencyandhighestQpk(worstcase).Doublepole:
()12141122ESRLCDLLDLQ+Q:
RHPzero:
()111LDrDDCRIDVseLo+=jLCLCDs211121+=40WorstCaseofBoostModeGain/-40-200204060freq/Hertz1241020401002004001k2k4k10k20k40k100k400k1MPhase/degrees-300-250-200-150-100-50phasedropsearliestHighestQpkVin=200V,Vo=200V;D=1()?
ThehighestQpkandsmallestdoublepolefrequencyhappenswhenD=200/340,whichmatchesouranalysis.?
WeshoulddesignbasedonVin=200V,Vo=340Vcase.12141122ESRLCDLLDLQ+1340200DVin=200V,Vo=340V;D=0.59Vin=260V,Vo=340V;D=0.76Doublepole:
jLCLCDs211121+=Vin=340V,Vo=340V;D=141InductancesImpactonLoopGainofBoostMode1101001.1031.1041.1051.10660251045801101001.1031.1041.1051.10636024012001201101001.1031.1041.1051.10660251045801101001.1031.1041.1051.1063602401200120?
SmallerL1leadstosmallQandhighdoublepolefrequency?
LargeL2leadstosmallQ42WaystoDecreaseQandPushQtoHighFrequencyBOOSTMODEBUCKMODEDouble-polepositionQDouble-polepositionDouble-zeropositionQjLLCLDLs211122+=jLLCDLLs211212+=11111111224)(LCjLCDCRESRCVLDIsin+=()12141122ESRLCDLLDLQ+()112121212DCRESRLCDLLLQ+IfL1canbereduced,thedoublepole(doublezero)positionwillbepushtohigherfrequency.AndalsotheQfactorwillbereducedaccordingly.ReducingBoostInductorsInterleavingBoost43ControlImplementationforSmoothTransitionAnalogimplementationforsmoothtransitionierrGi(s)+_+_0+_180d3d2d1Analog011212ierrGi(s)+_+_1+_0+_180d3d2d1DigitalDigitalimplementationforsmoothtransition102BoostModeBuckMode0-11BoostModeBuckMode44DoubleCarrierwithDifferentMagnitudesBuckmodecanobtainktimesloopgainoftheboostmode.Doublecarrierwithdifferentmagnitudesinanalogcontrol.Controldiagramofloopgain.diTGGFM=1mFMV=1boostdiTGGk=1buckdiTGG=buckboostTTk=45SimulationResultswhenVinVopk00.40.8Vbuck00.40.8Vboost10100200300400VinABS(Vgrid)Vmiddlecap0.010.020.030.04Time(s)0-2020Igrid46SpecificationsandComponentsSelectionL1,L2200HLo400HCB2000FCL2FS1,S2,S3SPW47N60C3D1,D2,D3C3D20060DSA,SB,SB,SDFGH30N60LSDCBVPVL1LoS1S2CLS3D1D2D3ILVACL2SASCSBSDRATEDPOWER2.5KWGRIDVOLTAGE208VAC/240VACGRIDFREQUENCY60HZINPUTVOLTAGE200500VSWITCHINGFREQUENCY50KHZ47PWMSignalsExperimentresultsofPWMsignalsDBoostDBuckVg_BuckVg_Boost48ExperimentalResultswhenVinVacpkDbuckDboostVgridIo50EfficiencyCurvesEfficiencycurvesofdifferentinputvoltageunderdifferentloadcondition10%20%30%50%75%100%0.040.050.120.210.530.05CEC=+ThusthistestbedinverterhasaCECefficiencyof97.4%.51IntroductiontoLONTENwww.lonten.ccEstablished:
Sept.2009Capital:
RMB10MillionProductsline:
PhotovoltaicInverterPowerSemiconductorDevices52LONTENsQualityProcessISO900153LONTENsPVInverterProducts3kW/4kW/4.6kWinPRODUCTIONCertifications:
VDEARN4105IEC/EN62109CNCA/CTS00042009A金太阳10kW20kWAvailableQ1,201354ConclusionsReducedpowerconversionstageswithonlyonePWMstageneeded,potentiallylowercostHighefficiencyduetoreducedhighfrequencyPWMoperationandadvancedtimesharingoperationHigherswitchingfrequencyispossibleAlargecapacitorbankisneededatthesourcetoensuremaximumpowertrackingMoreComplicatedmodelandcontrol55SpecialthankstoDr.ZhengZHAOThanksforyourattention!
Chenqiaolianglonten.ccQ56
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