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ID:34052874
大小:8.09 MB
页数:77页
时间:2019-03-03
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1、太原理工大学硕士研究生学位论文CONTROLANDSIMULATIONSTUDYOFWIND.PV—BATTERYACMICROGRIDABSTRACTWiththeincreasedprominenceofenvironrpentalissuesandtheelectricitydemandgrowing,windpower,photovoltaicandotherdistributedpowergenerations,whichislessinvestment,flexibleandenvironment—friendly,havebeengotgreatattention.Howeve
2、r,duetotheinfluenceofwindspeed,lightintensity,temperatureandothernaturalconditions,alargenumberofdistributedgeneratorsconnectedtothegridproducemanyadverseeffectstothestableoperationofpowersystemandpowerquality.InordertomakeuseofDGmorerationallyandefficiently,thescholarshaveputforwardtheconceptofthe
3、microgrid.Micro—gridconnectstothegridthroughacommonconnectionpoint,andadoptscoordinatedcontrolstrategy.Themicro—gridcanoperationingrid—connectedmode,whenthegridhappensafault,themicrogridcandisconnectfromthegridandswitchtoislandedmodeforcontinueoperationandsupplyelectricitytotheusers.Thispaperstudie
4、stheconvertercontrolstrategies,andusesdifferentcontrolstrategiesfordifferenttypeofDGs。AACmicrogridsimulationmodel,whichisconsistofwindpowergeneration,photovoltaicsystemandbattery,isbuiltthroughMATLAB/Simulinksoftware.Themicrogridoperationconditionintwomodesanditsswitchingprogressissimulatedandanaly
5、zedtoverifythe太原理工大学硕士研究生学位论文feasibilityofthecontrolstrategies.ThepowerflowbetweenmicrogridandbiggridisanalyzedwhentheDGoutputpowerchanges.Andtheroleofthebatteryenergystoragesysteminislandedmodeandgrid—connectedmodeisalsostudied.Thedetailsareasfollows:(1)ThebasiccomponentsandprinciplesofthreeDGs,ph
6、otovoltaicpowergenerationsystem,windpowergenerationsystemandbatteryenergystoragedevice,areanalyzed。Especially,thebidirectionalDC/DCconverteranditscontrolstrategy,whichareusedinthebatteryenergystoragedevice,areillustrated.ThesimulationmodelofthethreeDGsiSestablishedintheMATLAB/Simulinksoftwareandope
7、ratesthemrespectively.Theresultsshowthat,thephotovoltaicsystemandwindpowergenerationsystemoutputvoltagewaveformqualityisgoodandwhentheexternalenvironmentconditionchanges,theycanachievemaximumpowertracking.B
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