光储型微电网运行控制仿真-分析

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1、ABSTRACTAstheproblemoftheenvironmentismoreandmoreserious，thedistributedpowergenerationtechnologyhasbeenpaidwidelyattentionandlotsofresearchesareconducted．ButlargepenetrationofDGswillcertainlyreducethestabilityoftheutilitywhenaccessingtothenetworkandotherbadinfluenceswillalsobebroughtout．Inorder

2、tocoordinatethecontradictionsbetweenDGsandutilityandfullyexcavatevalueandbenefitsbroughtbyDGstousersandgrid，theresearchersproposetheconceptofMicrogrid．Microgridgetsthedistributedgenerators，loads，distributedenergystorages，andcontroldevicestogether,itcanoperatewithutilityactingasacontrollableunit

3、andapartfromutilityoperatingwithitselfwhenfaultoccurswithinthenetworkaswell．Microgridisregardedasthemosteffectivewaytousedistributedenergy．Aimingatthetypicalmicrogfid，abasicresearchisconductedtosupportthetheoreticalgistforthedemonstrationprojects，correspondingresearchworkasfollowing：1)ThePVgene

4、ratorsystemandenergystoragesystemareanalyzedparticularly,andthepracticalmathematicalmodelsofPVmodularandbatterycellarebuilt．Then，thedynamicalexternalcharacteristicsarestudied，andcomparedwiththeparagraphsupportedbymanufacturer．2)TheDCconvertorandACconvertor’Sstructureandcontroltechareintroducedp

5、articularly,andtheconstantpowercontrol，constantvoltage／frequencycontrol，droopcontrolareanalyzed，andcontrolstrategiesarebuiltcorrespondingly．MoreemphasesarepaidonPVcontrolofPVsystemandPQ&U／Fcontrolofenergystoragesystem，andtheyaremodeledandsimulatedlayingthefoundationforthewholemicrogridsimulatio

6、n．3)Themicrogrid’Soperationmodesandcoordinationcontrolmethodsaresummarized，andtheadvantagesanddisadvantagesofC-Smode，P2Pmode，hierarchicalmodeandtheproblemsneedtobesolvedatdifferentoperationmodeareanalyzed．Asaresult,apracticalmicrogridmodelbasedonC-SmodeisdevelopedincludingPVgeneratorandbatterys

7、ystem．4)ThemicrogridincludingPVandbatteryaremodeledbasedonPSCAD，whichisanelectromagnetictransientsoftwareusedinpowersystemsimulation．ThePQandU／fcontrolstrategyofDGarestudiedandsomeoperationconditionsaredesignedsuchasgrid—connected