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1、AbstractInrecentyears,withthecontinuousdepletionofresourcesandenvironmentalpollutionareincreasinglyshowingtheseriousnessofthedevelopmentoftherationaldevelopmentofnewresourcesandsmartdistributiongridisimminent.Basedontheabovebackground,DCmicro-gridwithanewgridstructuremodelgradually
2、beendeveloped,there'sthisnewmodelgridstructurewithourcurrentpowerdevelopmentcoincideswiththenecessaryhuman,graduallygainedwidespreadattention.Comparedwiththetraditionalexchangeofmicronetworkstructure,thecurrentprogressforDCmicro-gridisstillrelativelyslow,anditsenergymanagementstrat
3、egy,systemsControlStrategyisnotverycomprehensive.Betweenthis,thepaperlowvoltageDCmicro-gridinastudyrelatedtothecontrolstrategytofurtherpromotethedevelopmentofDCmicro-gridtomakeacontribution.Firstly,thepaperstudiesthestructureoftherequiredtwoDCmicro-gridnetworks,andeachindividualuni
4、ttobuildthecomponentpartsofthisDCmicro-gridstructurebuilttoexpandthebasicprinciplecomponentanalysisandmodels.Discussestheoperationofphotovoltaicmicro-sourceideas(works)inMATLABsimulationsoftwareforphotovoltaicmicrosourceswerebuiltmathematicalmodelsandsimulation,simpleexpositionofit
5、soutputcharacteristics,andusingthedisturbanceobservermethod,completeditsMPPToutput;battery,operatingcharacteristicsofthefuelcell,thebasicoperatingprinciplesandcharacteristicsofthecompositionofoutputDCmicro-gridisanalyzedandjudgment;theoperatingprincipleofDCmicro-gridsystemwithinthe
6、compositionoftherelevantconverter(DC/DC,AC/DC)anddynamiccharacteristicsaredescribed.Then,theintroductionofaDCmicro-gridsystemDCbusvoltagecontrolstrategy.ManDCmicro-gridstructuremodeltodroopcontrolmethodbasedonthemethodofsettingthethresholdvoltage,theDCbussystemtosetadifferentvoltag
7、elevel,andthenonthebasisoftheoperatingcharacteristicsofDCmicro-gridinadifferentsystemcharacteristicsunderdifferentoperatingmodes,accordingtothesystemDCbusvoltagechange,therespectivecomponentsofthesystemelementsaredesignedwithinitscorrespondingcontrolstrategy,sothatthephotovoltaicce
8、llcanoperateinconstantvolt
