单相光伏并网逆变器

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1、562IEEETRANSACTIONSONENERGYCONVERSIONVOL.21,NO.2,JUNE2006Single-PhaseSingle-StagePhotovoltaicGenerationSystemBasedonaRippleCorrelationControlMaximumPowerPointTrackingDomenicoCasadei,SeniorMember,IEEE,GabrieleGrandi,Member,IEEE,andClaudioRossiAbstractAmaximumpowerpointtrackingalgorithmforsingle

2、-stageconvertersconnectingphotovoltaic(PV)panelstoasingle-phasegridispresentedinthispaper.Thealgorithmisbasedontheapplicationoftheripplecorrelationcontrolusingasper-turbationsignalsthecurrentandvoltagelow-frequencyoscillationsintroducedinthePVpanelsbythesingle-phaseutilitygrid.Theproposedcontr

3、oltechniqueallowsthegenerationofsinusoidalgridcurrentswithunitypowerfactor.Thealgorithmhasbeendevel-opedtoallowanarrayofPVmodulestobeconnectedtothegridbyusingasingle-stageconverter.ThissimplestructureyieldshigherFig.1.SchematicdiagramofthePVgenerationsystem.efficiencyandreliabilitywhencomparedw

4、ithstandardsolutionsbasedondouble-stageconverterconfigurations.TheproposedmaximumpowerpointtrackingalgorithmhasbeennumericallysimulatedandexperimentallyverifiedbymeansII.OPERATINGPRINCIPLEofaconverterprototypeconnectedtoasingle-phasegrid.Theresultsarepresentedinthepaper,showingtheeffectivenessof

5、theTheVSIoutputvoltagevFiscontrolledinordertoforceproposedsystem.thecurrentinjectedintothemainsiStofollowasinusoidalIndexTermsActivefilters,energymanagement,photovoltaicreferencewaveform,synchronizedandinphasewiththefunda-powersystems,powerconditioning,powerquality.mentalcomponentofthesourcevol

6、tagevS.Asaconsequence,asinusoidalcurrentisobtainedeveninthepresenceofvolt-ageperturbationscomingfromthemains[3].TheamplitudeI.INTRODUCTIONofthereferencesourcecurrentI∗isgeneratedbythedclinkSHOTOVOLTAIC(PV)technologyisthemostpromisingvoltageregulatoronthebasisoftheerrorbetweenthedclinkPcandidat

7、eforthelarge-scaleadoptionofarenewableen-voltageVandthereferencedcvoltageV∗ofthePVpanels.dcdcergysource.PhotovoltaicroofsrepresentanimportantshareofTheMPPTalgorithmvariesV∗accordingtotheenviron-dcnewinstallationsofPVpanels.Fortheseappli