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1、萬(wàn)方數(shù)據(jù)ABSTRACTIthasgraduallybecometheworldconsensustovigorouslydevelopphotovoltaictechnologyforit’Sabundantresources，widespreaddistribution，simpleconstruction，environmentallyfi'iendly,etc．Accessingtothemainpower鰣dintheformofmicro-grid，whichisthemosteffectivemeasurestoimpr
2、oveitseffectivenessfordistributedPV．Forits’randomnessandintermittentcharacteristics，allkindsofproblemsoccurwhenthephotovoltaicmicrogridconnectedtothemaingrid．Therefore，itbecomesahottopictostudythephotovoltaicmicrogfid酊d-connectedpowerinterfaceanditscontrolmethod．Thisthe
3、sisstudiedthegrid—connectedflexibleinverter,andlaunchedaresearchonhybridcontroltheoryandmethodsofthenetworkoperationofthePVmicrogridflexibleinverter,whichhasnotonlyextremelyimportantacademicsignificance，butalsoaverywiderangeofapplications．Firstly,thebackgroundanddevelop
4、ment，theconcept，anddomesticandinternationaldevelopmentofmicro·-gridareintroduced；theconventionalmicrogridgrid--connectedinterfaceanditstraditionalcontrolmethodsaresummarized；thebasicconcept，classification，principleandresearchstatusofflexibleconverterarefocusedon；Moreove
5、r,thebasictopologyandworkingprincipleofthegrid-connectedflexibleconverteraredeeplystudied．Secondly,theConcepts，models，classificationandthecontrolmethodofhybridsystemtheoryarestudied．Detailedanalysisofthehybridfeatureofthe鰣d·connectedoperationsystemofthePVmicrogridflexib
6、leinverterwasmade．Combiningtheinverterworkingmodeandhybridcontroldecision--makingmechanismofthree--phasefull·-bridgeinverteroftheflexiblegrid··connectedinverter,theestablishmentofthree--phasefull-·bridgeinverterhybridautomatamodelwasmade，andthedesignmethodofdiscretecont
7、rollerandcontinuouscontrollerofflexiblegrid-connectedinverterisproposed．Finally,asimulationmodelformicro-gridphotovoltaicnetworkoperaionsystemisdevelopedontheMatlab／Simulinksoftware，andthesystemunderdifferentoperationmodesandworkingconditionsissimulatedandanalyzed．Thepr
8、oposedgrid-connectedflexibleinverterforphotovoltaicmicro-鰣d，asoneofhigh-powerelectronicpowerinterface．canself-
