Solar Inverter 光伏逆变器的研究报告.pdf

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1、1.PVinverterisheartofaPVsystem.Inverterfunctionstoconvertdirectcurrent(DC)intoalternatingcurrent(AC),whichturnsouttobea‘reverse'rectificationprocess.Photovoltaic(PV)inverteristhecoredeviceofphotovoltaicsystem.Theperformanceimprovementofinverterplaysacru

2、cialroleinpromotingtheefficiency&reliabilityandservicelifeofthesystemaswellasreducingcost.TheelectricitytypegeneratedbysolarphotovoltaicmoduleisnonlinearDC,whichmustbeconvertedtoACbyDC/ACinverterwhentransmittingtogrid.PVinverteristhecorecomponentofaPVsy

3、stem.TherearetwotypesofPVsystem,on-gridsystemandoff-grid.Accordingly,PVinvertersalsohavetwotypes,on-gridandoff-grid.Thecapacityofon-gridinverterusuallyisthesameasthatofPVsystem,whilecapacityofoff-gridinverterisdecidedbycapacityandtypeofload,normallyitis

4、smallerthanthatofPVsystem.ReferringtostatisticalrecordofPVsysteminstallationintheworld,on-gridsystemdominatesthetotalinstallationvolumeofworldPVsystem,reaching90%inasubsidycondition.Withthedevelopmentoftechnology,whencostofPVpowerreachesthelevelofwaterp

5、owerandthermalpower,off-gridapplicationwillbemorepopular.Oncurrentstage,on-gridinverteristhemainproductinvestedbymostcompanies.Technicalspecificsofon-gridinvertershowthelevelofPVinverters.2.MarketofPVinverterisstillBlueOceanCopenhagenconferencestartedth

6、eeraoflowcarboneconomy.Theconceptoflowcarbonbecomesmorepopular.Solarpoweristhemostpromisingcleanenergyduetoitscleannessandwideinstallationrange.Energyfromfossilwillbedepletedandreservescannotmeetlongtermneedofhuman.Findingareplacementisnecessary.Globalw

7、armingisbecomingmoreserious.Energysavingandcleantechnologyonlycancuresymptomsnotcause.Theonlywayistofindazeroemissionnewenergy.Solarenergyistheonlychoicetomeethumandevelopment.Technologyadvancementandscaleeffectwillmakecostofsolarpowerdecrease.Itisestim

8、atedthatifsalesofPVbatterydoubles,costwilldecrease15~20%.Inthemeantimecostoffossilenergykeepsincreasing.Costofsolarpowerisexpectedtoreachpeakpriceofelectricityin2010~2030andaveragepriceofelectricityin2020~2050.Withtheincreasingin