光储型微电网运行控制仿真分析

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1、ABSTRACTAstheproblemoftheenvironmentismoreandmoreserious，thedistributedpowergenerationtechnologyhasbeenpaidwidelyattentionandlotsofresearchesareconducted．ButlargepenetrationofDGswillcertainlyreducethestabilityoftheutilitywhenaccessingtothenetworkandotherbadinfluenceswill

2、alsobebroughtout．InordertocoordinatethecontradictionsbetweenDGsandutilityandfullyexcavatevalueandbenefitsbroughtbyDGstousersandgrid，theresearchersproposetheconceptofMicrogrid．Microgridgetsthedistributedgenerators，loads，distributedenergystorages，andcontroldevicestogether,

3、itcanoperatewithutilityactingasacontrollableunitandapartfromutilityoperatingwithitselfwhenfaultoccurswithinthenetworkaswell．Microgridisregardedasthemosteffectivewaytousedistributedenergy．Aimingatthetypicalmicrogfid，abasicresearchisconductedtosupportthetheoreticalgistfort

4、hedemonstrationprojects，correspondingresearchworkasfollowing：1)ThePVgeneratorsystemandenergystoragesystemareanalyzedparticularly,andthepracticalmathematicalmodelsofPVmodularandbatterycellarebuilt．Then，thedynamicalexternalcharacteristicsarestudied，andcomparedwiththeparagr

5、aphsupportedbymanufacturer．2)TheDCconvertorandACconvertor’Sstructureandcontroltechareintroducedparticularly,andtheconstantpowercontrol，constantvoltage／frequencycontrol，droopcontrolareanalyzed，andcontrolstrategiesarebuiltcorrespondingly．MoreemphasesarepaidonPVcontrolofPVs

6、ystemandPQ&U／Fcontrolofenergystoragesystem，andtheyaremodeledandsimulatedlayingthefoundationforthewholemicrogridsimulation．3)Themicrogrid’Soperationmodesandcoordinationcontrolmethodsaresummarized，andtheadvantagesanddisadvantagesofC-Smode，P2Pmode，hierarchicalmodeandtheprob

7、lemsneedtobesolvedatdifferentoperationmodeareanalyzed．Asaresult,apracticalmicrogridmodelbasedonC-SmodeisdevelopedincludingPVgeneratorandbatterysystem．4)ThemicrogridincludingPVandbatteryaremodeledbasedonPSCAD，whichisanelectromagnetictransientsoftwareusedinpowersystemsimul

8、ation．ThePQandU／fcontrolstrategyofDGarestudiedandsomeoperationconditionsaredesignedsuchasgrid—connected