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1、重庆大学硕士学位论文英文摘要ABSTRACTThisthesiswassupportedbyindependentresearchprojectofStateKeyLaboratoryofPowerTransmissionEquipment&SystemSecurityandNewTechnology(2007DA10512709208)andNationalNaturalScienceFoundationofChina(51277184).Themicrogridisaindividuallycontrollablesys
2、tem,whichcontainsdistributedgeneration(DG),distributedenergystorage(DS)andthecorrespondingload.Microgridhasadvantagesofautonomousoperation,faultrecovery,mutuallyreinforcing,optimizemanagementandcoordination.Themicrogridisdividedintomultiplesub-microgridstorealizela
3、rge-scaledistributedgenerationaccessing,enhancereliabilityandensurepowerqualityofmicrogrid.SothecoordinationcontrolamongDGs,DSs,localload,switchofmicrogridandmulti-microgridsystemshouldbeestablished,ensurethatthemicrogridcanmeetthepowerrequirementsofthelocaluserund
4、erdifferentoperatingconditions.Thispaperdesignstwo-levelhierarchicalcontrolschemeofmulti-microgridsystemwithseriesandparallelstructure,researchmicrosourcecontroller(MGCC)’sfunctionofpowercontrol,statemanagementandsynchronizationcontrol.Analysisoperationstatesandtri
5、ggereventsofthemulti-microgridsystem,simplifyandclassifiedoperationstates,aschemeofoperationstatetransitionisestablishedunderitscurrentoperationstateandtriggerevent.Accordingtothecharacteristicsofmulti-micro-gridsystemtie-linepowercontrolandsynchronizationcontrol,p
6、aperdesigncoordinationstrategyofMGCC.Themaincontentsareasfollows:Thepaperanalysisthecharacteristicsofmulti-microgridsystemwithseriesandparallelstructure,designstwo-levelhierarchicalcontrolschemeofmulti-microgridsystem,whichcontainsmaster-slaveMGCC.Therelationshipof
7、sub-microgridswithseriesstructureisupstreamanddownstream.Whenupstreamsub-microgridisislanding,thedownstreamisislanding.Therelationshipofsub-microgridswithparallelstructureisparallelrelationship,thepowerdistributionamongsub-microgridsisdeterminedbythepartitioncoeffi
8、cienttoregulatepowerofmulti-microgridsystem.Eachsub-microgridscontainsaMGCC,thepaperselectmasterMGCCfromMGCCtocontrolslaveMGCCandMicrosourceContr
