直流微电网储能系统双向dc%2fdc变换器控制策略研究

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1、万方数据太原理工大学硕士研究生学位论文theanalysisisverifiedbyMATLABanddSPACE．Thedetailsareasfollows：(1)ThispaperintroducesthedevelopmentofDCmicrogrid，andtheconfigurationoflaboratory—scaleDCmicrogridispresented．TheoperatingcharacteristicsoftwodifferentmodesofDCmicrogridareanalyzed，themodelandco

2、ntrollerofPVmoduleandbatteryaredesigned．BasedonthemathematicalmodelofPVmoduleandbattery,thecontrolcircuitofDC／DCboostconverterandbatterybi—directionalDC／DCconverteraredesignedrespectively．(2)Thispaperproposedahierarchicalcontrolstrategyforreliableandeffectiveoperationsofasta

3、ndaloneDCmicrogrid．ThefeaturesofproposedhierarchicalcontrolledDCmicrogridcanbesummarizedas：1)maximalusageofrenewableenergyandreliabilityenhancementisachievedbyHLIcontrol；2)real-timevoltageregulationcapabilityforpowermodulesandprioritizationsforcharging／dischargingoftheBESSwi

4、thdifferentSOCsareconsideredinHLIIcontrol；3)emergencyconditionsaremanagedbytheHLIIIcontr01．(3)BasedonproposedhierarchicalcontrolstrategyforenergystoragesysteminDCmicrogrid，acontrolschemeofbidirectionalDC／DCconverterandanautomaticcharging／dischargingenergystoragesystemaredesi

5、gned．Accordingtotherange，wheretheDCbusvoltagebelongsto，theoperatingmodeoftheenergystoragesystemcanbeautomaticallyjudgedandtheswitchingoveramongoperatingmodescanbeautomaticallyperformedasoccasionrequires，thustheenergystoragesystemcanbefreelyswitchedamongII万方数据太原理工大学硕士研究生学位论文c

6、harging，dischargeandidlemodes，andthedamageofthebatterycausedbythefrequentswitchingoverbetweencharginganddischargingmodesduetoordinaryfluctuationofDCbusvoltagecanbeavoided．(4)ThemodelforcontrolsystemandmaincircuitofbidirectionalDC／DCconverterofsinglebatteryenergystoragesystem

7、arebuiltinMatlab／Simulinkanddifferentcasesinchargingmodeanddischargingmodearesimulatedanalyzed．Thefeasibilityoftheproposedcontrolstrategyisvalidbyresultsofexperiments．(5)ExperimentalplatformofbidirectionalDC／DCconverterbasedondSPACEisbuilt．Thesignalacquisitioncircuit，driving

8、circuitandsoftwareprotectionmodulearedesigned．Real—timecontrolisrealizedint