光伏发电站设计规范 GB 50797-2012 （英文版）

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Foreword

ThiscodeispreparedbyShanghaiElectricPowerDesignInstituteinconsultationwithotherorganizationsofinterestinaccordancewiththerequirementsofdocument〔2009〕No.88concerning"NoticeonPrintingtheDevelopmentandRevisionPlanofNationalEngineeringConstructionStandardsin2009",issuedbyMinistryofHousingandUrban-RuralDevelopmentofChina.

Thiscodeconsistsof14chaptersand3appendixes,technicallycovers:generalprovisions,termsandsymbols,basicrequirements,siteselection,solarresourceanalysis,photovoltaicpowergenerationsystems,planningforPVpowerstation,electric,gridconnectconnection,buildingandstructure,watersupplyanddrainage,heating,ventilationandairconditioning,protectionagainstenvironmentpollutionandsoilerosion,laboursafetyandindustrialsanitation,protectionagainstfirehazardsandthreeappendixes.

Theprovisionsprintedinboldtypearecompulsoryandmustbeenforcedstrictly.

TheMinistryofHousingandUrban-RuralDevelopmentisinchargeofmanagingandinterpretingthecompulsoryarticlesofthiscode.ChinaElectricityCouncilisresponsiblefordailymanagementofthiscode.ShanghaiElectricPowerDesignInstituteisresponsiblefortheexplanationofspecifictechnicalcontents.Relevantadvisoryopinions,ifany,canbepostedtoShanghaiElectricPowerDesignInstituteCO.,LTD.(Address:No.310,ChongqingNanlu,Shanghai,China200025)

Themainparticipatingdevelopmentorganizations,participafingdevelopmentorganizations,chiefdraftingstaff,chiefreviewers:

ChiefDevelopmentOrganizations:

ShanghaiElectricPowerDesignInstituteCO.,Ltd.

ChinaElectricityCouncil.

ParticipatingDevelopmentOrganizations:

ChinaElectronicsEngineeringDesignInstitute

GCLSolarSystemLimited

InstituteofElectricalEngineeringChineseAcademySciences

BeijingCoronaScienceandTechnologyCo.,Ltd.

XinJiangElectricPowerDesignInstitute

GS-Solar(Fujian)Co.,Ltd.

ShanghaiGreenEnvironmentalProtectionEnergyCo.,Ltd.

CEEG(Nanjing)SolarEnergyResearchInstituteCo.,Ltd.

ShanghaiShenzhouElectricPowerCo.,Ltd.

NorthManEnergyTechnology(Beijing)Co.,Ltd.

ZhongguangLightingProtectionTechnologiesCo.,Ltd.

ChinaGeneralCertificationCenter

BeijingQianhuaScienceandTechnologyCo.,Ltd.

WuxiHaosolarHaosolarCo.Ltd.

ChinaGuodianSolarEnergyResearchInstitute

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ChiefDraftingStaff:

GuoJiabaoXuYongbangGuHuaminYuanZhiqiangYuJinhui

ZhuWeigangWangLiYuYingLiuDaizhiZhuKaiqingHeHui

YuGengZhangPingCaoHaiyingChaoYangZhaoXiaoyong

GongChunjingJiShanghaiLiuLiminHuangJianLvPingyangTanHongTangZhengqiChengXuZhangKaijunChenShuisongHuoDarenZhuTaoQiaoHaiwenXuLangangJiaYangangSiDeliangLiYangWangDeyan

WangZongYeLiujinZhangHaipingChiefReviewers:

WangSichengXusonglinWangYiLiShiminYuanKaifengHanChuangaoWuJinhuaGaoPingWangYeZhangHaiyangYanChanghuiWangYuguoWangWenpingRanQipingChenMoziLvHongshuiFengWeiXiWei

ZhongTianyuLinLanlanJiangShipingWangXiaojingLiXiaojun

ZhangShusengHanJinlingZhangLeiYangGe

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Contents

1GeneralProvisions (1)

2TermsandSymbols (2)

2.1Terms (2)

2.2Symbols (4)

3BasicRequirements (6)

4SiteSelection (7)

5SolarResourceAnalysis (9)

5.1GeneralRequirements (9)

5.2StandardConditionsandDataCollectionforReferenceWeatherStation (9)

5.3BasicRequirementsofSiteSolarRadiationObservationStation (10)

5.4ValidationandAnalysisofSolarRadiationObservationData (10)

6PhotovoltaicPowerGenerationSystem (12)

6.1GeneralRequirements (12)

6.2ClassificationofPhotovoltaicPowerSystems (12)

6.3MainEquipmentSelection (12)

6.4PhotovoltaicArray (14)

6.5EnergyStorageSystem (14)

6.6PowerGeneratingEstimate (15)

6.7TrackingSystem (16)

6.8PVSupportingBracket (16)

6.9ConcentratorPhotovoltaic(CPV)Systems (19)

7PVPowerStationLayout (21)

7.1GeneralPlaneLayout (21)

7.2PVArrayLayout (23)

7.3SecurityFacilities (24)

8Electric (26)

8.1Transformer (26)

8.2MainElectricScheme (26)

8.3AuxiliaryPowerSystem (28)

8.4DCSystem (28)

8.5EquipmentforPowerDistribution (29)

8.6EquipmentforReactivePowerCompensation (29)

8.7SecondaryElectricalSystem (29)

8.8OvervoltageProtectionandGrounding (30)

8.9SelectingandLayingCables (30)

9GridConnection (31)

9.1GeneralRequirements (31)

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9.2GridConnectionRequirements (31)

9.3RelayProtection (34)

9.4Automation (35)

9.5Communication (36)

9.6ElectricEnergyMetering (36)

10BuildingandStructure (38)

10.1GeneralRequirements (38)

10.2ArchitecturalStructureforGround-mountedPVPowerStation (38)

10.3BuildingIntegratedPhotovoltaic (39)

10.4Structure (39)

11WaterSupplyandDrainage,Heating,VentilationandAirConditioning (42)

11.1WaterSupplyandDrainage (42)

11.2Heating,VentilationandAirConditioning (42)

12EnvironmentalProtectionandSoilandWaterConseryation (44)

12.1GeneralRequirements (44)

12.2EnvironmentalProtection (44)

12.3SoilandWaterConservation (44)

13OccupationalSafetyandHealth (45)

14FireProtectionandPrevention (47)

14.1FireRiskClassificationforBuilding (47)

14.2TransformerandOtherOil-inmersedElectricalEquipment (49)

14.3Cables (50)

14.4ArchitecturalStructureforEvacuafion (50)

14.5FirehydrantandAlam (50)

14.6EmergencyPowerSupplyandLighting (52)

AppendixADailySolarRadiationEstimationbyMonthVersusLatitude (54)

AppendixBRecommendedValueofOptimalTiltAngleforPVArray (55)

AppendixCSteelAnchor (56)

ExplanationofWordinginThisCode (57)

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1GeneralProvisions

1.0.1Thiscodeisformulatedtofurtherimplementtherelevantnationallaws,regulationsandpolicies,harnesssolarresources,optimizenationalenergystructure,establishsafeenergysupplysystem,promotetheapplicationofphotovoltaic(PV)powertechnologies,standardizePVpowerstationdesign,andpromotefavorableandhealthydevelopmentofPVpowerstationconstruction.

1.0.2Thiscodeisapplicabletonewlybuilt,expandedormodifiedgrid-connectedPVpowerstationsandoff-gridPVpowerstationswithacapacityof100kWporabove.

1.0.3Feasibilitystudyofconnectintegrationintopowergridshallbemadeforallgrid-connectedPVpowerstations.

1.0.4ThedesignofPVpowerstationshallcomplywithnotonlytherequirementsstipulatedinthiscode,butalsothoseinthecurrentrelevantnationalnationalstandard.

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2TermsandSymbols

2.1Terms

2.1.1Photovoltaic(PV)module

Aminimumindivisiblesolarcelldeviceassembledwithpackagingandinternalcoupling,andcapableofindividualDCoutput,alsonamedassolarcellmodule.

2.1.2Photovoltaicmodulesstring

Circuitofseries-connectedPVmodules.

2.1.3Photovoltaic(PV)powerunit

Thepowerunitwithcertainnumberofphotovoltaicstrings,connectedtogetherthroughaDCcombinerbox,theoutputshallmeetthegridrequirementsintermsoffrequencyandvoltageviainverterandisolatedtransformer.

2.1.4Photovoltaic(PV)array

AssemblyofmechanicallyintegratedandelectricallyconnectedPVmodules,PV.panelsorPVsub-arraysanditssupportstructure.

2.1.5Photovoltaic(PV)powergenerationsystem

Assemblyofcomponentsthatproduceandsupplyelectricitybytheconversionofsolarenergy.

2.1.6Photovoltaic(PV)powerstation

Apowerstationiscomposedofmainlyphotovoltaicpowergenerationsystem,includingavarietyofbuildingsandauxiliaryfacilitiesforrepairing,maintenanceandstafflivingaswell.

2.1.7Radialconnection

AllPVpowerunitsareconnectedtothebusofthepowerstationthroughcircuitbreakersindividually.

2.1.8Tappedconnection

AnumberofPVpowerunitsinparallelareconnectedtothePVpowerstationbusviaasinglecircuitbreaker.

2.1.9Trackingsystem

AsystemprovidesrealtimetrackingoftheincidentangleofsunlightbyrotatingthesupportingstructureofthePVarray,resultinginhigherirradiationcollectedbytheilluminatedPVmodulesandhenceimprovingsystemoutput.

2.1.10single-axistrackingsystem

Trackingsystemthatfollowsthesunineithertheelevationortheazimuthdirectiononly.

2.1.11Double-axistrackingsystem

Trackingsystemthatfollowsthesunineithertheelevationortheazimuthdirectiononly.

2.1.12Collectiorline

DCorAClinescollectingtheinputsforvariousDCorACpowersources.

2.1.13Pointofcommoncoupling(PCC)

Thelocationonthesystemwhereanothercustomercanbeserved.

2.1.14Pointofcoupling(POC)

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ForPVpowerstationwithastep-uptransformersubstation,POCisdefinedasthebusorgridconnectionpointonthehighvoltagesideofthesubstation.

ForPVpowerstationwithoutastep-uptransformersubstation,POCisdefinedasthepointofoutputconnectionofthePVpowerstation.

2.1.15Islanding

Modeofoperationforoperatinganisland.

Note:islandingoperationincludesmaintainingfrequency,voltage,powerreserve,andinstantaneousactiveandreactivepowerrequirements.

2.1.16Intentionalislanding

Accordingtopre-madecontrolplans,intentionallycausingislandingtooccurinspecificsystemsduringgridvoltagelosses.

2.1.17Unintentionalislanding

Unplannedanduncontrolledislandingphenomena.

2.1.18Anti-islanding

Measuresthatpreventunintentionalislandingeventsfromoccurring.

2.1.19Peaksunshinehours(PSH)

(Unit:h)Amountoftimethatthesolarirradianceisatreferencelevels

Notes:1Ratedsun-hoursisusuallyexpressedonadailybasis.

2IfG1.,e=1kW·m-²then"ratedsun-hours"overanyperiodoftimeisnumericallyequaltothefrradiationoverthesameperiodasexpressedin1kW·m-².

2.1.20Lowvoltageridethrough(override)

WheregridsystemfailureordisturbancescausesvoltagedropsatPointofCoupling,underacertainvoltagerangeareperiod,allowsthePVpowerstationcontinuousoperationwithoutdisconnection.

2.1.21AnnualpeaksunhoursofPVstation

RadiantsolarenergyreceivedbythePVpowerstationperyearintermsofpeaksunshinehours.

Calculatedbythefollowingequation:

Tp=Q/(1kW/m²)(2.1.21)

where:T——annualsunshinehoursalongthePVarrayplane,inhours(h);

Q——annualirradiationonthePVarrayplane(kW·h/m²).

2.1.22DirectNormalIrradiance(DNI)

Ameasureofthesolarirradiationstrikingasurfaceheldnormaltolineofsighttothesun.

2.1.23Capacityofinstallation

ThetotalratedpowerofallPVmodulesinstalledinaPVpowerstation,unitispeakwatts(Wp).

2.1.24Wattspeak

ThepoweroutputofthePVmoduleorarrayoperatingatthemaximumpowerpointunderstandardtestingconditions(STC).

2.1.25Solartime

SystemoftimereckoningbasedontheSun'spositioninthesky;undersolartime,noonatasiteisReferencetowhenthemiddleofthesunreachesupperculmination.

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2.2Symbols

2.2.1Energyandpower

Cc——Batterybankcapacity(kW·h);

Ep——Electricityoutputtogrid(kW·h);

Es——IrradianceunderSTC.(SolarConstant=1kW/m²);

HA——Horizontalirradiance(kWh/m²);

PAz——InstalledcapacityofPVmodules(kWp);

P₀——Averageloadcapacity(kW);

Q——Irradianceattiltangleofarray(kW·h/m²).

2.2.2Voltage

Uɴ——Ratedvoltageatgridconnectionpoint(kV);Vdcmax——MaximuminputDCvoltageofinverter(V);

VMPPTmax——MaximumMPPTvoltageofinverter(V);

VMPPTmin——MinimumMPPTvoltageofinverter(V);

Vo——OpencircuitvoltageofPVmodule(V);

Vmp——OperatingvoltageofPVmodule(V)?

2.2.3Temperatureandtime

D——Maximumdurationofloadworkingwithoutsunshine(h);Tp——AnnualpeaksunhoursonPVtiltedplane(h);

t——MinimumoperatingtemperatureofPVmodule(℃);

t′——MaximumoperatingtemperatureofPVmodule(℃)

2.2.4Dimensionlesscoefficients

F——Correctionfactorofbatterydischargeefficiency;

K——Generalefficiencycoefficient;

Ka—EfficiencyoftheACcircuitincludinginverterefficiency;

K、——TemperaturecoefficientofPVmodulesopencircuitvoltage;K'——TemperaturecoefficientofPVmodulesoperatingvoltage;

N——NumberofPVmodulesinseries(Nsettointeger);U——Depthofdischargeofbatteries.

2.2.5Structuralcoefficients

C——Structuralmemberdeformationlimitvaluefornormaluse;R——Designvalueforresistanceofstructuralmember;

S——Load(andearthquake)effectcombineddesignvalue;

γo——Importancefactor;

YRE——Loadingshockresistancecoefficient;

YG——Partialsafetyfactorforstructuralpermanentloading;

Yw——Partialsafetyfactorforwindload;

y₁——Partialsafetyfactorfortemperatureaction;

ys——Partialsafetyfactorforsnowload;

YEh——Partialsafetyfactorforearthquakeaction;

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SGK——Characteristicvalueofpermanentloadeffects;

SIK——Characteristicvalueoftemperatureaction;

Swk——Characteristicvalueofwindload;

S₃k——Characteristicvalueofsnowload;

SEhK——Characteristicvalueofearthquakeaction;

4——Combinationvaluecoefficientoftemperatureaction;ψ₈——Combinationvaluecoefficientofsnowload;

ψ——Combinationvaluecoefficientofwindload.

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3BasicRequirements

3.0.1ThedesignofPVpowerstationshalltakeintoaccountsuchfactorsassolarresources,landandconstructionconditions,andinstallationandtransportationconditions,andmeettherequirementsforsafety,reliability,economy,environment-friendly,easyaccesstomaintenanceandinstallation.

3.0.2ThedesignofPVpowerstationshallachievesafetyandreliabilitygoals,whileprioritizingtheuseofstate-of-the-arttechnology,techniques,equipmentandmaterials.

3.0.3SolarradiationmeasuringequipmentshouldbeinstalledonsiteformediumandlargePVpowerstations.

3.0.4ThePVpowerstationshallbesoconfiguredastoensurethepowerqualityofoutputtocomplywithcurrentrelevantstandardofthenation.

3.0.5PVpowerstationconnectedtothegridshallbeequppedwithpowermeteringdevicesthatarecertifiedbylocalauthorities,andbecalibratedbeforeputintouse.

3.0.6PVpowersysteminstalledonbuildingsmustnotreducesunshineconditionoftheadjacentbuildings.

3.0.7PVpowerstationattachedto_existingbuildingmustundergore-checkprocessofbuildingstructureandelectricsafety,andshallmeetthesafetyrequirementofthebuildings.

3.0.8WhendesigningPVpowerstation,theon-siteengineeringgeologicalconditionsshallbeexploredandsurveyed.Inaddition,geomorphology,structureandmainstratadistribution,physic-mechanicalproperties,groundwaterconditionatthesitelocationshallbesurveyed.

3.0.9AllequipmentandcomponentsofPVpowerstationshallcomplywithcurrentrelevantnationalstandards.Themainequipmentshallbecertifiedbyauthorizedcertificationbodies.

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4SiteSelection

4.0.1Thesiteselectionofphotovoltaicpowerplantshalltakeintoaccountfactorssuchasnationallongandmediumtermrenewableenergydevelopmentplanning,naturalconditionsoftheregion,solarenergyresources,transportation,gridconnection,regionaleconomicdevelopmentplan,'andotherinfrastructure.Duringsiteselection,itisnecessarytoappropriatelyaddressadjacentagriculture,forestry,animalhusbandry,fisheries,industrialandminingenterprises,cityplanning,nationaldefensefacilitiesandpubliclivesetc.

4.0.2DuringsiteselectionofPVpowerstation,apreliminarysolutionshallbedevelopedwithrespecttoallrequirementsofgridstructure,electricalload,traffic,transportationandenvironmentalprotectionaswellaseffectonthestationoftransmissionlinecorridors,geology,seismology,topography,hydrology,meteorology,dismantlementofstructuresontheland,construction,andindustrialandminingenterprisesaround.Thedemonstrationandevaluationshallbeprovidedthroughcomprehensivetechnicalandeconomictrade-off.Wheremultiplesitesareavailableforselection,therecommendedsitesshallbelistedinorderofpreference.

4.0.3ThedesignoffloodprotectionforPVpowerstationsshallmeetthefollowingrequirements:

1ThePVpowerstationshallmeetthefloodprotectionrequirementsasshowninTable4.0.3.ForstationswhichgroundlevelisbelowthehighestwaterlevelinTable4.0.3,floodprotectionmeasuresshallbeimplemented.Themeasuresoffloodprotectionanddrainingshallbeplannedalongwithcapacityplanninginthefirstphaseofproject,butimplementedinphasesafterwards.

Table4.0.3FloodprotectionclassesandrequirementofPVpowerstations

Floodprotectionrequirements(re-occurrenceperiod)

(MW)

highestwaterlevelwithare-occurrenceperiodof100years

highestwaterlevelwithare-occurrenceperiodof50years

highestwaterlevelwithare-0ccurrenceperiodof30years

>500

30-500

<30

Floodprotectionclass

Plannedcapacity

工ⅡⅢ

2Whenlevee(orbreakwater)issetupforPVpowerstationlocatedintheseaside,theleveetopelevationshallcomplywithfloodprotectionrequirements(re-occurrenceperiod)showninTable4.0.3,andequalto1%waveascentofcumulativefrequencyofwavetraininre-occurrenceperiodof50yearsplusextra0.5mforsafetypurpose.

3Whenlevee(orbreakwater)issetupforPVpowerstationlocatedbesideriversandlakes,theleveetopelevationshallcomplywithfloodprotectionrequirements(re-occurrenceperiod)showninTable4.0.3,andplusextra0.5mforsafetypurpose.whentheinfluencebywind,wave,andtidesbecomesheavier,anextrawaveascentinre-occurrenceperiodof50yearsshallbeadded.

4Whenlevee(orbreakwater)issetupforPVpowerstationlocatedinthewaterloggedareas,theleveetopelevationbedeterminedbydesignedwaterlevelofinlandwaterloggingofre-occurrenceperiodof50yearsplusextraheightof0.5mforsafetypurpose.Ifitisdifficulttobedetermined,theleveetopelevationshallbedeterminedbythehighestrecordofwaterlevelofinlandwaterloggingin

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historyplusextraheightof0.5mforsafetypurpose.Ifequippedwithdrainingfacilities,theelevationmaybedeterminedbydesignedwaterlevelofinlandwaterloggingplusextraheightof0.5mforsafetypurpose.

5ForPVpowerstationslocatedinmountainareas,themeasuresforpreventionanddrainageofmountaintorrentshallbeimplemented.Thefacilitiesforpreventionanddrainageofmountaintorrentshallbedesignedaccordingtothefrequencyof2%.

6Whentherearenoleveesinthestationarea,theelevationofthetopoftheequipmentfoundationandtheoutdoorgroundheightofbuildingshallbenotlessthantherequirementohthefloodprotectionrequirementsasshowninTable4.0.3(re-occurrenceperiod)orthehighestwaterlevelinthere-occurrenceperiodof50years.

4.0.4ThesiteofPVpowerstationonthegroundshouldbeselectedinflatareaorslopeareawherethenorthishigherthanthesouth.ThebuildingofPVpowerstationinslopeareashouldfacetowardssouthornearlytowardssouth,andshouldavoidanysurroundingobstaclestoshadePVmodules.

4.0.5ThesiteofPVpowerstationshallavoidtheregionswheretheairisfrequentlyandseriouslypollutedbyairbornedust.

4.0.6ThesiteofPVpowerstationshallavoidthegeologicalareassusceptibletodisastersuchaslooserocks,mudslide,karst,landslide,andfaultzone.

4.0.7Whenthesiteofstationisselectedatgoafand/oritsinfluencedarea,thegeologicalhazardassessmentshallbecarriedouttoprovideacomprehensiveevaluationabouttheextentofgeologicalhazard,offeringtheevaluationofthesitesuitabilityofthestationandmakingappropriatepreventive

measures.

4.0.8PVpowerstationshouldbebuillontheregionswhichbasicearthquakeintensityisequaltoorlowerthan9.Otherwise,theseismicsafetyevaluationshallbecarriedout.

4.0.9ThesiteofPVpowerstationshallavoidtheculturalheritageareas,andtheminingareaswithavalueofexploitationincludingopenpitminesandtheshallowundergroundmines.

IncasethereareantiquesandmineralsunderPVpowerstation,therelevantapprovalfromauthoritiesofantiqueandmineralshallbeobtained,andtheassessmentshallbemadeaboutthePVpowerstationsafetyaftertheexcavationofculturalantiqueandmineralfromunderneath.

4.0.10PVpowerstationshallbebuiltonnon-arablelandorinfertileland.Thestationshallnotdamagetheoriginalriversystem,butmakegoodprotectionofvegetation,reducetheamountofearthexcavation,saveland,andreducethedemolitionofhousesandpopulationmigration.

4.0.11Thesiteselectionshallconsiderthetransmissionlinecorridorforconnectiontothegridwhenpowerstationreachestheplannedcapacity

4.0.12PVpowerstationsmaybebuiltinthesiteofwindfarmifpossible.

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5SolarResourceAnalysis

5.1GeneralRequirements

5.1.1FordesigningPVpowerstation,thebasicsolarenergyresourcesituationofthePVpowerstationsiteandtheadaptabilityoftherelatedgeographicalconditionsandclimatecharacteristicsshallbeanalyzed.

5.1.2WhenanalyzingthesolarenergyresourcesofthePVpowerstation,suchastheannualsolarradiationanditschangingtrend,theweatherstationwhichisneartothePVpowerstationwithlong-termobservationrecordsofsolarradiationandshallbeselectedasreferenceweatherstation.

5.1.3Ifusingsiteobservationdatatoanalyzethesolarenergyresource,thedatarecordshallbeconsecutiveandnotlessthanoneyear.

5.1.4Duringtheinitialphaseofalarge-scalePVpowerstationproject,itisbettertoestablishanon-sitesolarradiationobservationstationandtoselecttheon-siteobservationdatafornolessthanonecompleteyear.

5.2StandardConditionsandDataCollectionforReferenceWeatherStation

5.2.1Thereferenceweatherstationshallhavemorethan10yearscontinuouslong-termobservationrecordsofsolarradiation.

5.2.2TheclimatecharacteristiesandgeographicfeaturesofthereferenceweatherstationsiteshallbeconsistentwiththatofPVpowerstationsite.

5.2.3ThereshallbegoodcorrelationbetweentheradiationobservationdataofthereferenceweatherstationandthedataoftheobservationdeviceatPVpowerstationoverthesameperiod.

5.2.4Theinformationcollectedfromthereferenceweatherstationsshallinclude:

1Forthelongtermdataobservationthestandardused,themodelofradiationmeasuringinstrument,theinstallationposition,elevation,surroundingenvironmentconditions,aswellasthebasicsituationandtimesofweatherstationlocationchange,radiationequipmentmaintenanceandsurroundingenvironmentchanges.

2Themonth-by-monthrecordsofthetotalradiation,beamradiation,diffuseradiation,andsunshinehourobservationrecordsoverlastconsecutive10years.Aswellasatleasthourlyobservationrecordsforonecompleteyearofthesameperiodasobservationstationonsite.

3Theaveragevalueofthemaximumirradianceforeachof12monthsinlastconsecutive

10years

4Therecordsofaveragetemperature,extremehighesttemperatures,extremelowesttemperatures,daytimehighesttemperaturesanddaytimelowesttemperaturesforeachof12monthsinlastconsecutive30years.

5Therecordsofannualaveragewindspeed,extremehighestwindspeedandoccurrencetime,dominantwinddirection,maximumdepthoffrozensoilandthicknessofsnow,andquantityofprecipitationandevaporationinlast30years.

6Therecordsofdisastrousweatherconditions,suchascontinuousrainingandovercast

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days,thunderstormdays,hailtimes,sandstormtimesandstrongwindtimesforthelast30years.

5.3BasicRequirementsofSiteSolarRadiationObservationStation

5.3.1SolarradiationobservationstationshouldbesetuponthePVpowerstationsite.Observationshallcontainobserveddataintimesequence,suchasthetotalradiation,beamradiation,diffuseradiation,maximumirradiance,temperature,humidity,andwindspeedanddirection.TheinstallationofobservationstationandtherealtimeobservationrecordsshallcomplywiththeSurfaceMeteorologicalObservationRequirementsQX/T55.

5.3.2ForthelargePVpowerstationwithPVarrayinstalledonfixedoptimumtiltangle,itshouldbeequippedwithadailysolarradiationobservationatsameoptimumtiltangle.

5.3.3ForthelargescalePVpowerstationwithtiltsingleaxisorhorizontalsingleaxissolartracker,adailysolarradiationobservationdeviceshouldbeaddedonthesolartrackingsurface.

5.3.4ForthehighconcentratingPVpowerstation,adirectnormalirradiation(DNI)observationdeviceshallbeadded.

5.3.5Theonsitereal-timeobservationdatashouldbetransmittedviawiredorwirelesscommunication.

5.4ValidationandAnalysisofSolarRadiationObservationData

5.4.1Solarradiationobservationdatashallbesubjecttointegritychecksandmeetthefollowingrequirements:

1Thechronologicalorderofreal-timedataobservedshallbethelsameasanticipatedchronologicalorder.

2Thenumberofreal-timeobservationdatarecordedinspecificchronologicalordershallbeequaltotheexpectedrecordingnumber.

5.4.2Forthesolarradiationobservationdata,therationalitycheckshallbeconductedbasedonthedailyastronomicalradiation.Theobservationdatashallmeet