直流微网分层控制策略研究

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1、万方数据华北电力大学硕士学位论文AbstractInordertoacceptdistributedgeneration(DG)andmeetthegrowingneedsoftheDCload，DCmicrogridconnectingDG，energystoragedeviceandloadcellthroughDClineandconnectingACpowergridthroughthecontrollableinterfaceisbecomingthenewdirectionofrese

2、archonmicrogridinthefuture．ComparedwithACmicrogrid，the行equencyandsynchronizationproblemsdonotexistinDCmierogird，SODCmicrogridismoresuitableforvarietyofDCtoaccess．Inaddition，theproportionofloaduseDCpowerdirectlyincreases，DCmicrogridcancutdownthenumbero

3、fconvetersandreducepowerlOSS．However，withvariouscomponents，complicatedoperationconditionsandflexiblecontrolmodeinDCmicrogrid，howtocoordinatethecontrolofeachunittoworkinvarietyofoperationmodesandreachthegoalofreliableandefficientfortheloadpowersupplyis

4、theproblemneedtosolve．ThestructureandmathematicalmodelofDCmicrogridwithphotovoltaicunitandhybridenergystoragesystem(HESS)containbatterycellandsupercapacitorisbuiltinthispaper，themodelofeachcomponentandconverterisalsoestablished．Basedonthesemodels．theh

5、ierarchicalcoordinationcontrolstrategycontainssystemlayerandconverterlayercontrolofDCmicrogridisestablished．Theoperationconditionisdividedaccordingtogrid—connectionstatus，theDCbusvoltageandbatterystateofcharge(SOC)parameters，SOthecontrolstrategyofeach

6、layerisidentified．Finally，thehierarchicalcontrolstrategyofDCmicrogridisverifiedthroughsoftwaresimulationanalysis．ThesimulationresultsshowthattheoperationcontrolstrategycanachievethecontroltargettomaintainthepowerbalanceofDCmicrogridandthestabilityofDC

7、busvoltage，andthehierarchicalcontrolstrategyprovedtobescientificandeffective．Keywords：DCmicrogrid；photovoltaicgeneration；hybridenergystoragesystem；hierarchicalcontrolstrategy万方数据华北电力大学硕士学位论文目录摘要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯IAbstract．．．．．．．．．．．．．．．．．

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