光伏组件测试基础介绍

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1、PVGuidelinesGMCI-ChinaCharlesMa13817443004PhotovoltaicsPhotovoltaicsThefieldofphotovoltaicshasexperiencedrapiddevelopmentsinceitsbegin-ningsinrecentyears.Insightandgrowingknowledgeregardingthefinitena-tureoffossilfuelsandnuclearenergysources,aswellastheir

2、consequencesfortheenvironment,havereawakenedinterestinsolartechnology.StudiesrevealthatcurrentuseofPVtechnologyhasjustbegunandwillevolveextensivelythroughcontinuousgrowth.Therenewableenergysourcesactsup-portsautonomousgenerationofecologicallyfriendlyenerg

3、y.Inactualpractice,uncertaintyfrequentlyprevailsaboutwhichnormativerequirementshavetobeadheredtowheninstallingandtroubleshootingPVsystems.ThePVSignpostoffersassistanceforroutinedailywork.Photovoltaicsisameansofgeneratingelectricalvoltageusingphotonenergyf

4、romthesun.SchematicDiagramofaGrid-ConnectedPVSystemIdentificationofBuildingswithPVSystemsAnidentifyingsignshouldbeinstalledincloseproximitytothedistributorcabinetorservicelines(atleast148x105mm).Source:PhotovoltaicSystems,DGS,VDEPVgenerator(severa

5、lPVmodulesconnectedinseriesandparallelwithmountingframe)Generatorterminalbox(withsafetytechnology)DirectcurrentconductorsDirectcurrentenablingdeviceInverterACcablesMetercabinetwithelectricalcircuitdistribution,importandexportmeters,servicelineandsaf

6、etytechnologyirthErmograPhyByaccuratelymeasuringthetemperatureatthesurfaceofasolarmodule,thermalimagingcamerasallowforquickandefficienttroubleshootingofawidevarietyofdefects.Advantagesincludeimage-generating,contactless,non-destructivetestingofthePVsystem

7、duringnormaloperationandtheabilitytoscanlargesurfaces.Forpurposesofqualityassurance,thermographyshouldalsobeusedtotestthesystemafterinstallationhasbeencompleted.Amongstothers,thefollowingdefectscanbedetectedwiththehelpofthermography:Short-circuitsinsolarc

8、ells,contamination,penetrationbymoisture,cracksincellsorsolarglass,badcontactsbetweentheconductorstripandsolarcells,defectivebypassdiodes,modulesinno-loadoperationanduncon-nectedmodules,mismatches,i.e.powerlossdueto