IEC62108D6b.docx
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IEC62108D6b.docx
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IEC62108D6b
NORMEINTERNATIONALECEI
INTERNATIONALSTANDARDIEC
62108Draft6b
ConcentratorPhotovoltaic(CPV)ReceiversandModules
-DesignQualificationandTypeApproval
IECTC82WG7WorkingDraft
INTERNATIONALELECTROTECHNICALCOMMISSION
________________
CONCENTRATORPHOTOVOLTAIC(PV)RECEIVERSANDMODULES
-DESIGNQUALIFICATIONANDTYPEAPPROVAL
FOREWORD
1)TheIEC(InternationalElectrotechnicalCommission)isaworldwideorganizationforstandardizationcomprisingallnationalelectrotechnicalcommittees(IECNationalCommittees).TheobjectoftheIECistopromoteInternationalcooperationonallquestionsconcerningstandardizationintheelectricalandelectronicfields.Tothisendandinadditiontootheractivities,theIECpublishesinternationalStandards.Theirpreparationisentrustedtotechnicalcommittees;anyIECNationalCommitteeinterestedinthesubjectdealtwithmayparticipateinthispreparatorywork.International,governmentalandnon-governmentalorganizationsliaisingwiththeIECalsoparticipateinthispreparation.TheIECcollaboratescloselywiththeInternationalOrganizationforStandardization(ISO)inaccordancewithconditionsdeterminedbyagreementbetweenthetwoorganizations.
2)TheformaldecisionsoragreementsoftheIECattechnicalmatters,preparedbytechnicalcommitteesonwhichalltheNationalCommitteeshavingaspecialinterestthereinarerepresented,express,asnearlyaspossible,aninternationalconsensusofopiniononthesubjectsdealtwith.
3)Theyhavetheformofrecommendationsforinternationalusepublishedintheformofstandards,technicalreportsorguidesandtheyareacceptedbytheNationalCommitteesinthatsense.
4)Inordertopromoteinternationalunification,IECNationalCommitteesundertaketoapplyIECInternationalStandardstransparentlytothemaximumextentpossibleintheirnationalandregionalstandards.AnydivergencebetweentheIECStandardandthecorrespondingnationalorregionalstandardshallbeclearlyindicatedinthelatter.
5)TheIECprovidesnomarkingproceduretoindicateitsapprovalandcannotberenderedresponsibleforanyequipmentdeclaredtobeinconformitywithoneofitsstandards.
6)AttentionisdrawntothepossibilitythatsomeoftheelementsofthisInternationalStandardmaybethesubjectofpatentrights.TheIECshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.
InternationalStandardIEC62108hasbeenpreparedbyIECtechnicalcommittee82:
Solarphotovoltaicenergysystems
Thetextofthisstandardisbasedonthefollowingdocuments:
FDIS
Reportonvoting
82/XXX/FDIS
82/XXX/RVD
Fullinformationonthevotingforapprovalcanbefoundinthereportonvotingindicatedintheabovetable.
CONTENTS
1ScopeandObject4
2NormativeReferences4
3TermsandDefinitions4
4Sampling5
5Marking6
6Testing6
7PassCriteria13
8Report13
9Modifications14
10TestProcedures14
10.1VisualInspection14
10.2ElectricalPerformanceTest15
10.3GroundPathContinuityTest17
10.4ElectricalInsulationTest18
10.5WetInsulationTest19
10.6ThermalCyclingTest19
10.7DampHeattest21
10.8HumidityFreezeTest22
10.9HailImpactTest23
10.10WaterSpray24
10.11BypassDiodeThermalTest25
10.12Robustnessofterminationstest26
10.13Mechanicalloadtest27
10.14Off-axisBeamDamageTest28
10.15UltraVioletConditioningTest28
10.16OutdoorExposureTest29
10.17Hot-spotEnduranceTest29
Annex ASummaryofTestConditionsandRequirements34
CONCENTRATORPHOTOVOLTAIC(CPV)RECEIVERSANDMODULES
-DESIGNQUALIFICATIONANDTYPEAPPROVAL
1ScopeandObject
ThisInternationalStandardspecifiestheminimumrequirementsforthedesignqualificationandtypeapprovalofconcentratorphotovoltaic(CPV)receiversandmodulessuitableforlong-termoperationingeneralopen-airclimatesasdefinedinIEC60721-2-1.ThetestsequenceisbasedlargelyonthatspecifiedinIEC61215andIEC61646forthedesignqualificationandtypeapprovalofflatplateterrestrialcrystallinesiliconandthin-filmPVmodules.However,somechangeshavebeenmadetoaccountforthespecialfeaturesofCPVreceiversandmodules,particularlywithregardtotheeffectsoftrackingalignment,highcurrentdensityandrapidtemperaturechanges,whichhaveresultedintheformulationofsomenewproceduresandtests.
TheobjectofthistestsequenceistodeterminetheelectricalandthermalcharacteristicsoftheCPVreceiversandmodulesandtoshow,asfaraspossiblewithinreasonableconstraintsofcostandtime,thattheCPVreceiversandmodulesarecapableofwithstandingprolongedexposureinclimatesdescribedinthescope.TheactuallifeexpectancyofCPVreceiversandmodulessoqualifiedwilldependontheirdesign,theirenvironmentandtheconditionsunderwhichtheyareoperated.
2NormativeReferences
Thefollowingnormativereferencescontainprovisionswhich,throughreferencedinthistext,constituteprovisionsofthisInternationalStandard.Allnormativereferencesaresubjecttorevision.Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.Fordatedreferences,onlytheeditioncitedapplies,buttheinvestigationtothepossibilityofapplyingthemostrecenteditionsishighlyencouraged.MembersofIECandISOmaintainregistersofcurrentlyvalidInternationalStandards.
IEC60904-1:
Photovoltaicdevices-Part1:
MeasurementsofPhotovoltaicCurrent-VoltageCharacteristics.
IEC60068-2-21:
1999Tests–TestU:
RobustnessofTerminationsandIntegralMountingDevices.
ISO/IEC17025:
1999GeneralRequirementsfortheCompetenceofTestingandCalibrationLaboratories.
3TermsandDefinitions
Forthepurposesofthisdocument,thefollowingtermsanddefinitionsapply.
-Concentrator:
Atermassociatedwithphotovoltaicdevicesthatuseconcentratedsunlight.
-Concentratorcell:
Thebasicphotovoltaicdevicewhichisusedundertheilluminationofconcentratedsunlight.
-Concentratoroptics:
Anopticaldevicewhichincreasesthelightintensityfromitsinputtooutput.Typically,itisalensoramirror.Aprimaryopticsreceivesunconcentratedsunlightandoutputsaconcentratedlight.Asecondaryopticsreceivesconcentratedlightfromtheprimaryoptics,andperformsoneormorefollowingfunctions:
furtherconcentrating,filteringspectrum,modifyinglightintensitydistribution,orchanginglightdirection.
-Concentratorreceiver:
Agroupofoneormoreconcentratorcellsandsecondaryoptics(ifpresent)thatacceptsconcentratedsunlightandincorporatesthemeansforthermalandelectricenergytransfer.Areceivercouldbemadeofseveralsub-receivers.Thesub-receiverisasmallerportionofthefullsizereceiver.
-Concentratormodule:
Agroupofreceivers,optics,andotherrelatedcomponentssuchasinterconnectionandmounting,thatacceptsunconcentratedsunlight.Allabovecomponentsareusuallyprefabricatedasoneunit,andthefocuspointisnotfieldadjustable.Amodulecouldbemadeofseveralsub-modules.Thesub-moduleisasmallerportionofthefullsizemodule.
-Concentratorassembly:
Agroupofreceivers,optics,andotherrelatedcomponentssuchasinterconnectionandmounting,thatacceptsunconcentratedsunlight.Allabovecomponentswouldusuallybeshippedseparatelyandneedsomefieldinstallation,andthefocuspointisfieldadjustable.Anassemblycouldbemadeofseveralsub-assemblies.Thesub-assemblyisasmallerportionofthefullsizeassembly.
Table1.TermsUsedforCPV
Primaryoptics
Module–prefabricatedandthefocuspointisnotfieldadjustable.
Assembly–needsomefieldinstallationandthefocuspointisfieldadjustable
Secondaryoptic
Receiver
Cells
Electricenergytransfermeans
Thermalenergytransfermeans
Interconnection
Mounting
FiguresfromFigure1toFigure5areschematicsofcells,receivers,modulesandassemblies.
4Sampling
Sevenreceiversectionsandfivemodules(plussparesasdesired)arerequiredtocompleteallthespecifiedtests.Forassemblies,fivemodulescouldbereplacedbyfivepiecesofprimaryoptics.Forreflectivetroughanddishconcentrator,itmeansfive“mirrors”.Ontherestofthisstandard,only“module”willbementioned,butifapplicable,itshouldbeunderstoodas“primaryoptics”,or“mirrors”,forassemblies.
Thesetestsamplesshouldbetakenatrandomfromaproductionbatchorbatches.Whenthesamplestobetestedareprototypesofanewdesignandnotfromproduction,orsub-receiversandsub-modulesareused,thesefactsshouldbenotedinthetestreport(seeclause8).
Thetestsamplesshouldhavebeenmanufacturedfromspecifiedmaterialsandcomponentsinaccordancewiththerelevantdrawingsandprocessinstructionsandshouldhavebeensubjectedtothemanufacturer’snormalinspection,qualitycontrolandproductionacceptanceprocedures.Theyshouldbecompleteineverydetailandshouldbeaccompaniedbythemanufacturer’shandling,mounting,connectionandoperationmanuals.Samplesshouldnotbepre-conditioned,e.g.,light-soakedorsubjecttootherspecialproceduresthatarenotapartofstandardproduction.
IftheIntrusivebypass-diodethermaltestistobeperformed,anadditionalspeciallyfabricatedreceiverwithelectricalleadsandthermocouplesbroughtoutforaccessingindividualdiodeisrequired.
Incasethatafullsizereceiverormoduleistoolargetofitintoavailabletestingequipment,suchasenvironmentalchambers,orafullsizereceiverormoduleistooexpensive(considera20kWreflectivedishconcentratorsystem,sevenreceiversectionsaccountfor140kWPVcells),arepresentativesample,sub-receiverorsub-module,canbesu
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