微电网无缝切换控制策略研究

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1、浙江工业大学硕士学位论文RESEARCHoFMICRoGIUDSEAMLESSTRANSFERSTRATEGYABSTRACTWiththeincreasingdepletionofenergyandenvironmentalissuesbecomeprominent，distributedgenerationasaneffectivewaytosolvetheseproblemshasbeenbooming．Themicrogrid，asaneffectivecarryingwayofdistributedgeneration，Canfully

2、takeadvantagesofdistributedgenerationandsupporteachotherwiththegrid，whichmakesusersobtainuninterruptedreliablepowersupply．Themicrogridseamlesstransferbetween鲥d—connectedmodeandislandingmodeisthepremiseofensuringthenormaloperationofsensitiveloadinmicrogrid，whichbecomesoneofthe

3、importantcontentsofmicrogridresearch．Accordingtothemicrogridseamlesstransfercontrolproblems，thetraditionaldroopcontrolstrategyisstudied．Byimprovingthetraditionaldroopcontrolstrategyandintroducingtheadaptivecontrol，thispaperputsforwardanadaptivedroopseamlesstransfercontrolstra

4、tegytoachievethemicrogridseamlesstransferbetweengrid—connectedmodeandislandingmode．Themainresearchcontentsarelistedasfollows：1．Themicrosourceinterfacecontrolstrategyisdetailedexpoundedinthispaper．Eachmoduleisanalyzedintermsofthemicrosourceinverterinterfacemodeling，instantaneo

5、uspowercalculation，thebasisofdroopcontrolstrategy,thevoltageandcurrentdual—loopdecouplingcontroltheoryandthevoltagespacevectorpulsewidthmodulationcontrolmethod．2．Thetraditionaldroopcontrolstrategyispresented．Basedonthetraditionaldroopcontrolstrategy,animproveddroopcontrolstra

6、tegyisproposedandtheimproveddroopcontrollermathematicalmodelisbuilt．Byintroducingtheadaptivecontrolintotheproposedcontrolstrategy,anadaptivedroopseamlesstransfercontrolstrategyisproposed；3．Theimplementationofmicrogridseamlesstransfercontrolmethodisgiven．ThroughtheMATLAB／Simul

7、inkmodelingandsimulation，theadaptivedroopseamlesstransfercontrolstrategyisverifiedandcomparativeanalysisbetweenthetraditionaldroopcontrolstrategyandtheproposedstrategyhasbeencarriedon．Throughtheresearchofintroducingtheadaptivecontrolintomicrogfidcooperatestothetraditionaldroo

8、pcontrolstrategytorealizemicrogirdseamlesstransferprocess，theconclus