光伏发电并网逆变控制技术研究

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1、Abs仃actRESEARCHONPHOTOVOLTAIC(PV)POWERGRID—CONNECTEDINVERTERCONTROLTECHNOLOGYAbstractWiththedevelopmentofeconomyandtheprogressofscienceandtechnology，humandemandforenergyisgrowing．Thefuture，humandemandforenergyhasnotbeensatisfiedbythetraditionalfossilenergy,there

2、fore，thedevelopmentofalternativeenergysourceswillbeusedasthemaindevelopedcountriesintheworldfocusonthefutureenergystrategy．Solarenergyasbeingtheearliesthumandevelopmentandutilizationofenergy,becauseitisaclean，pollution．freeandthereservesofnearlyunlimitedadvantag

3、esbackintoflhumanvision．Utilizationofsolarenergyphotovoltaictechnologyasanimportanttechnicalmeans，theresearchhasimportantsignificancetoalleviatetheenergycrisis．ThethesisfirstintroducesthePVgrid-connectedsystemstructure，discussesthefunctionofeachpart．Asphotovolta

4、icgrid—connectedgenerationsystemkey，three-·phasegrid··connectedinvertercontroltechnologyresearchisthekeycontentofthearticle．Priortothis，thepaperfirstofthreephasegrid—connectedinverterisstudied，analysisoftheinverterstructure，workingprincipleanditsmainapplicationt

5、ypes，especiallyongrid—connectedinvertersystemcommonlyusedcurrenttypeinverterwithvoltagetypeinverterforcomparisonandresearch，andsummarizestheirfeatures．Thenthispaperselectsvoltagetypeinverterasmaincircuitofthreephasephotovoltaicgrid—connectedsystemstructure，andit

6、smathematicalmodelareanalyzed，thispaperderivesitsintheDQcoordinatesofthemathematicalmodel．fortheinvertercontroltechnologyresearchfor．Throughtheresearchontheoutputcharacteristicsofphotovoltaiccells．photovoltaiccelloutputnonlinearcharacteristicsareclearlyexplained

7、．SeveralcommonlyusedMPPTmethodwereanalyzed，aftercomparison，incrementalconductancemethodwasselectedforthispapertorealizethespecificMPPTalgorithm．AmethodbasedondoubleloopcontrolinveIrtercontrolstrategyisDroposedinthispaper．Thebasicideaofthismethodis：thephotovoltai

8、c鲥d．Conllectedpowersystemgridconnectedpowertrackingphotovoltaicarraymaximumoutputpower．SVPWMmodulationisreferencedarticlesofgrid．connectedcurrentcontroi，currem100p1sa