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1、ABSTRACTABSTRACTWindandsolarenergyhasbeenwidelyused.however,duetothewindandsolarpoweraregreatlyaffectedbyenvironmentalchanges,thelimitationsareexposedwhenapplied,duetothewindandsolarenergyhavenaturalcomplementarity,windandsolarhybridsystemscantakeadvantageofthisna
2、turalcomplementarity,sowindandsolarhybridsystemsarestudyinginthispaper.Thesystemsprinciplesandprogramsofwind/solarhybridsystemareanalyzingonthispaper,Analysisofthepowerbalanceoftheentiresystemfromtheperspectiveofthepowercontrol,researchthepowercontrolalgorithmandp
3、owercontrolalgorithmresearch,thispaper’sworkcontentfromthefollowingaspects:First,twokindsofwind/solarhybridstructureareanalyzedandcomparedbasedonmicro-grid,thestructurebasedontheDCbusinparallelisproposed,andmicro-sourcecharacteristicsofthesystemaremodelingandanaly
4、sis;MPPTandpowercontrolarebasedonthisstructureandmodel;Next,windandsolarmaximumpowerpointtrackingalgorithmandanalysis,severalcommonlyusedMPPTcontrolalgorithmsareanalyzed,andcompareitsadvantagesanddisadvantages,andproposeanewcontrolmethod.Thenfocusonthemethodofpowe
5、rcontrolstrategies,analyzetheoperationprincipleandmethodbasedonDCbusvoltage,andanalyzethecontrolmethodonGRID-connectandislandstate,puttheemphasisonpowercontrolmethodofGRID-connectstate,andpowerbalancecontrolmethodbasedonDCbusvoltage;Finally,weusethesimulinktoolbox
6、ofmatlabcompletewind/solarhybridsystemsimulationmodelbasedonDCbusstructure,simulatethemaximumpowertrackingofphotovoltaicandwindpowergenerationsystemsseparately,thesystemcantrackthemaximumpowerpointeffectively;andsimulatetheintegratedsystemonGRID-connectandislandst
7、atebasedonDCbusstructure,andanalyzeitsoutputpower,inputpower,batterychargepowerandDCbusvoltagewaveformsbasedonthepowercontrolalgorithm,thenBuildasystemplatform.Keyword:MPPT,wind/solarhybrid,DistributedPower,BusvoltagebalanceII目录目录第一章绪论.............................
8、..............................................................................11.1背景和意义.................................................................