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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.ef?ciencyandreliabilitywhencomparedw
4、ithstandardsolutionsbasedondouble-stageconvertercon?gurations.Theproposedmaximumpowerpointtrackingalgorithmhasbeennumericallysimulatedandexperimentallyveri?edbymeansII.OPERATINGPRINCIPLEofaconverterprototypeconnectedtoasingle-phasegrid.Theresultsarepresentedinthepaper,showingtheeffectivenessof
5、theTheVSIoutputvoltagevFiscontrolledinordertoforceproposedsystem.thecurrentinjectedintothemainsiStofollowasinusoidalIndexTermsActive?lters,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
