直流微电网混合储能控制及系统分层协调控制策略

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1、万方数据太原理工大学硕士研究生学位论文selected，andthesimulationmodelofPVunitissetupinMatlab／Simulink，andtheMPPTandCVcontrolmethodaretestedinallkindsofexperimentalconditions．ThesimulationresultshowsthePVunitCanworksteadilyinthetwocontrolstrategy．Second，theoperatingprinciple，ou

2、tputfeatures，andmathematicalmodelardstudied，andthispaperplacesagreatemphasisonthecircuitstructionandparametersofbi-directionalDC／DCconverterofhybridenergystoragesystem(HEss)．TheimprovedcontrolstrategyofHESSisproposed．Thestrategycouldmaketheadvantagesofhighp

3、owerdensityofsupercapacitor(SC)andhighenergydensityoflithiumbatterycomplementarytoeachother,optimizetheiroutputfeatures，andimprovedynamicflexibilityandoperatinglifeoftheHESS．WiththecoordinateworkofSCandlithiumbatteryincorrespondingoperationlayers，thetargeto

4、fadjustingthedclinkvoltageandbalancingsystempowerisrealized．Third，thispaperstudiesthesruction，powerflow,andcontrolmethodoftheDCmicrogrid．Thehierarchicalcoordinatedcontrolbythevariationofthedcvoltageisproposed．Thesystemoperationisdividedintofivedifferentlaye

5、rsbytheproposedcontrolstrategy．WiththecoordinationoftheMPPTandCVcontrol，thevoltagedroopcontrol，andthecontrolofdcload，thedclinkvoltageisadjustedautomatically,thedifferentlayersisswitchedsmoothly,andtheDCmicrogridcouldworkwellinallkindsofoperatingcondition．At

6、last，theDCmicrogridexperimentalplatformincludingofthePVunit，IV万方数据太原理工大学硕士研究生学位论文HESSanddcloadisconstructed．Thehardwarestructureandsoftwaredesignoftheplatformarediscussedindetail．ThestrategyofHESScontrolandsystemhierarchicalcoordinatedcontrolareverifiedbyfi

7、veexperiments．ExperimentalresultsshowthattheHESSCanadjustdelinkvoltageandbalancesystempowerwell，andthatthedclinkvoltageisregulatedautomatically,thedifferentlayersisswitchedsmoothlyandtheDCmicrogridcanoperatesafelyandsteadilybythesystemcoordinatecontr01．KEYW

8、ORDS：DCmicrogrids，hybridenergystoragesystem，photovoltaic，Coordinatedcontrol，dSPACEV万方数据太原理工大学硕士研究生学位论文目录摘要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯IABSTRACT⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯