光伏发电微逆变器的分析

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1、垒垦墨!!坠竺!ABSTRACTABSTRACT：Today，theenergycrisisandenvironmentalpollutionproblemaremoreandmoreserious．Torealizethesustainabledevelopmentstrategicgoal，clean，renewableenergydevelopmentandutilizationareconcernedbyhuman．Solarenergy，becauseofitsabundant，cleanandnopollution，isrecogniz

2、edtobeoneofthemostidealrenewableenergy．Photovoltaic(pv)gridinverteristheconversionandconnectionequipmentofphotovoltaicpanelsandpowergrid，whichisthekeyofphotovoltaicpowergenerationsystems．Theperformanceofinverterdirectlyaffectstheoverallefficiencyofphotovoltaicpowergenerationsy

3、stems．Inthispaper，thestudiedmicroinverterisaconversioninterconnection，whichtransformsthesmallpowerandlowdcvoltageintohighvoltageandaccurrent．Andrealizesthemaximumpowertrackingofasinglephotovoltaicpanel，avoidsthelarge—scalepvarraysbecauseoflocaldamageorshadowedfromimpactingtheo

4、verallefficiency．Asawhole．effectivelyimprovethesecurity，reliability，effectivenessofphotovoltaic(pv)system．First，Thispapersummarizedthecommonlyusedmicroinvertertopologystructuresandtheirrespectiveadvantagesanddisadvantages．Afteranalysisandcomparison，proposednXtype—microinverter

5、structure，whichisbasedonnXtypeconverter，Second，analyzedtheworkingprincipleoftopologystructureindetail；Accordingtotheoutputcharacteristicsofphotovoltaiccells，thispaperdesignedthemaximumpowerpointtracking(MPPT)，grid—connectedalgorithmandislanddetectionmethod．Themaximumpowerpoint

6、trackingadopteddisparitystepdisturbanceobservation，whichCanrapidlytrackthemaximumpowerpointofpvpanelsandimprovesystemstability；Thegridcurrentcontroladoptedquasiproportionresonantcontrolmethod，whichCaneffectivelyeliminatethedisturbancecausedbygridvoltage，simpli母thecontrolalgori

7、thm，andoptimizethegridoutputcurrentwaveform；Theislanddetectionadoptedpassiveowe／overvoltagestrategy．AccordingtOtheworkingprincipleofthesystemandthecontrolstrategy，derivedparameterselectionbasis；UsingMATLABTM／SIMULINKsoftwareplatform，thispaperconductedalargenumberofsimulationsb

8、ynXtypemicroinvertertopologyoperationcharacteristic，verifiedt