光伏微网柔性变流器并网运行混成控制-研究

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1、万方数据ABSTRACTIthasgraduallybecometheworldconsensustovigorouslydevelopphotovoltaictechnologyforit’Sabundantresources，widespreaddistribution，simpleconstruction，environmentallyfi'iendly,etc．Accessingtothemainpower鲥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鲥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-鲥d，asoneofhigh-powerelectronicpowerinterface．canself-