IEC62108D6b.docx

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