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FEASIBILITYRESEARCHREPORTCHINAELECTRICEQUIPMENTGROUPWWWCEEGCNFEASIBILITYRESEARCHREPORTOF5MWONGRIDPVPOWERSYSTEMPROJECTINSAMOACEEG200984FEASIBILITYRESEARCHREPORTCHINAELECTRICEQUIPMENTGROUPWWWCEEGCNTABLEOFCONTENTS1GENERALINTRODUCTION11OVERVIEW12SOLARENERGYRESOURCESANDGEOGRAPHICAL/METEOROLOGICALCONDITIONS13ENGINEERINGGEOLOGY14TASKANDSCALEOFPROJECT15PROJECTDESIGN16TECHNICALDESIGN17FIREPROTECTION18ORGANIZATIONSTRUCTUREDESIGN19ENGINEERINGMANAGEMENTDESIGN110ENVIRONMENTALPROTECTIONANDSOIL/WATERCONSERVATION111LABORSAFETYANDINDUSTRIALHYGIENE112ENGINEERINGBUDGETARYESTIMATE113ENERGYSAVINGANDEMISSIONREDUCTIONBENEFITS2THECONSTRUCTIONCONDITIONSOFSAMOA21SOLARRADIATIONCONDITION22LOCATIONTERM221SITELOCATION222CONSTRUCTIONSITECONDITIONS223GEOGRAPHICALLANDFORMS224GEOLOGYSITUATION225SITECONCLUSION23CLIMATECHARACTERISTICPROVIDEDBYCUSTOMER,NEEDTENYEARMETEOROLOGICALDATA3THEBASICCONDITIONSOFELECTRICPOWERSYSTEMINSAMOA31BASICCONDITIONSOFPOWERCONSTRUCTION32SUPPLYCONDITIONOFPOWERSYSTEM33DEMANDCONDITIONOFPOWERSYSTEMNEEDBALANCETABLEOFELECTRICPOWER34THEPROBLEMOFPOWERSYSTEM35THEDEVELOPMENTPLANOFPOWERSYSTEM4DESIGNOFSOLARPHOTOVOLTAICPOWERSTATION41DESIGNOFSOLARARRAYS411SELECTIONOFPVMODULES412THEEFFICIENCYEVALUATIONOFONGRIDPVPOWERSYSTEM413RADIATIONCALCULATIONOFTHEINCLINEDSURFACEOFSOLARARRAY414SERIESPARALLELPLANOFPVSYSTEM415LAYOUTOFPVARRAY416CIVILENGINEERINGDESIGN42DCCOMBINERBOXDESIGNWITHLIGHTINGPROTECTIONFORPVARRAY43DCPOWERDISTRIBUTIONCABINETDESIGN44SELECTIONOFPVGRIDTIEINVERTER45ACPOWERDISTRIBUTIONCABINETDESIGNWITHLIGHTNINGPROTECTION46ACSTEPUPTRANSFORMERDESIGN47BLOCKDIAGRAMOFSYSTEMPROGRAM48DESIGNOFINTERFACETOPOWERGRID49PROGRAMIMPROVEMENTSFEASIBILITYRESEARCHREPORTCHINAELECTRICEQUIPMENTGROUPWWWCEEGCN410CONSTRUCTIONDESIGN4101CONSTRUCTIONCONDITION4102TRANSPORTATIONOFCONSTRUCTION4103PERMANENTLANDFORCONSTRUCTION4104MAINPARTOFCONSTRUCTION4105INSTALLATIONOFPVARRAY4106ARRANGEMENTOFCONSTRUCTION5ENVIRONMENTALIMPACTASSESSMENTINCONSTRUCTIONPHASEANDMEASUREMENTOFEMISSIONREDUCE6PUBLICBENEFITS61PROMOTETOURISTINDUSTRY62CREATEJOBOPPORTUNITIES7PREDICTIONOFELECTRICITYGENERATION71ELECTRICITYGENERATIONINFIRSTYEAR72ELECTRICITYGENERATIONIN25YEARS8INVESTMENTCOSTANDRECOVERY81STATICINVESTMENTEVALUATION811PROJECTCONSTRUCTIONCOSTBUDGET812MAINTENANCEFEE813TOTALSTATICINVESTMENT82REVENUEOFELECTRICITYGENERATED83COMPARISONOFSTATICINVESTMENTANDREVENUE84RECOVERYOFSTATICINVESTMENT9INTRODUCTIONOFCEEGFEASIBILITYRESEARCHREPORTCHINAELECTRICEQUIPMENTGROUPWWWCEEGCN1GENERALINTRODUCTION11OVERVIEWSAMOAS5MWONGRIDPVDEMONSTRATIONPROJECTISLOCATEDINPOLYNESIA,THESOUTHERNEQUATORIALREGIONITSGEOGRAPHICALCOORDINATES1382S,17201W,THEAVERAGEALTITUDEOF63MTHESITEISOPEN,FLAT,EASILYACCESSIBLEANDCONVENIENTSPECIFICLOCATIONCANBEFOUNDINTHEATTACHEDMAPINFIG11FIG1THELOCATIONOFPVPOWERSTATIONTHEPVPOWERSTATIONCOVERSAROUND100,000WITHALENGTHOF563MANDAWIDTHOF1805MACCORDINGTOTHEANALYSISOFSOLARENERGYRESOURCESPREINSTALLEDREQUIREMENTSANDOPTIMIZEDLAYOUT,17,920280WMODULES,998MMWIDTH1956MMLENGTHFOREACHMODULE,WILLBEINSTALLEDINTHE100,000AREATHETOTALCAPACITYOFPVPOWERSTATIONIS50176MWANDWILLGENERATEAROUND7,752,900KWHEACHYEAR12SOLARENERGYRESOURCESANDGEOGRAPHICAL/METEOROLOGICALCONDITIONSACCORDINGTOREGIONALSOLARRADIATIONDATAANDANALYSIS,SOLARRESOURCEINTHEPROJECTSITEHASSEVERALFEATURESINTHEFOLLOWINGCONCLUSIONS121THEPROJECTISLOCATEDINRICHSOLARRESOURCEAREAOFSAMOAACCORDINGTONASASOLARRADIATIONDATAMEASUREDINTHEPAST30YEARS,THEAVERAGEAMOUNTOFSOLARRADIATIONIS6,9081MJ/M2,THEAVERAGEHOURSOFSUNSHINEARE3,313HOURS122CHOOSETHEBESTANGLEOFPVARRAYCANEFFECTIVELYINCREASETHEAMOUNTOFFEASIBILITYRESEARCHREPORTCHINAELECTRICEQUIPMENTGROUPWWWCEEGCNRADIATIONBASEDONTHENASADATABASEONSAMOASRADIATIONWITHDIFFERENTINCLINEDANGLE,THEOPTIMUMFORPVPANELINSTALLATIONIS189THENTHEPVPANELWILLRECEIVEMAXIMUMRADIATIONOF70539MJ/M2THROUGHOUTTHEYEAR13ENGINEERINGGEOLOGYTHEPROJECTSITEISCOVEREDBYPLANTBUTNORIVER,LAKEINTHEAROUNDTHEDISTANCETOTHEAIRPORTISABOUT400MANDTHEAIRPORTHIGHWAYINTHENORTHNORESIDENTSLIVEINTHESURROUNDINGAREA,NORDOESANYMININGFACTORYMOREINFORMATIONISREQUIREDTOBEPROVIDEDBYCUSTOMERS,FOCUSEDONTHEGEOLOGYCONDITIONS,WHICHSHOULDMEETTHECONSTRUCTIONREQUIREMENTANDTHEEFFECTONCONSTRUCTION14TASKANDSCALEOFPROJECTTHELOCATIONISIDEALFORPVPOWERPLANTBECAUSEOFTHERICHSOLARRESOURCE,CONVENIENTTRANSPORTANDGRIDCONNECTIONCONDITIONSAMOAS5MWONGRIDPVDEMONSTRATIONPROJECTWILLADHERETOTHEPRINCIPLEOFWORLDSUSTAINABLEDEVELOPMENTOFENERGY,INLINEWITHTHENATIONALENERGYSTRATEGYWHICHCALLSFORREDUCINGCONSUMPTIONOFFOSSILRESOURCESANDHARMFULEMISSIONSSUCHASCOALFIREDPOLLUTIONSOTHISPROJECTWILLPLAYANIMPORTANTROLEINPROMOTINGTHELOCALTOURISMANDLOCALECONOMICDEVELOPMENTTHEREFORE,THEDEVELOPMENTOFTHISPROJECTISVITALNECESSARY15PROJECTDESIGNTHISPROJECTUSESDISTRIBUTEDGENERATIONANDCENTRALIZEDGRIDCONNECTIONSTRATEGYTHEWHOLESYSTEMWILLBEDIVIDEDINTOFIVE1MWUNITSANDCONNECTSTOLOCALGRIDAT22KVVOLTAGEPOINTTHROUGHFIVE04/22KVTRANSFORMERTHEWHOLESYSTEMHAS17920280WMONOCRYSTALLINEPVPANELS,THEACTUALOUTPUT50176MWFOREACH1MWSUBSYSTEM,THEREAREFOUR250KWGRIDTIEINVERTERSEACH250KWINVERTERCONSISTSOFONEDCPOWERDISTRIBUTIONUNIT,INWHICHTHEREIS10DCCOMBINERBOXWITHLIGHTNINGPROTECTION,6INPUTSFOREACHCOMBINERBOXANDTOTAL56INPUTSFOR1MWUNITFOREACHINPUT,THEREISONEPVSTRINGWITH16PANELSINSERIESSO1250KWINVERTERHAS896PVPANELSINPUT,AND3584PVPANELSINPUTFOR4INVERTERSATTHEOUTPUTOFEACHINVERTER,THEREISANACPOWERDISTRIBUTIONCABINETWITHLIGHTINGPROTECTION,ANDCONNECTINGTOA1250KVA04/22KVSTEPUPTRANSFORMER16TECHNICALDESIGN161MAINPOWERSYSTEMDESIGNSILICONPVMODULEISCEEGSST28072P,MONOCRYSTALLINE,THESTANDARDPOWEROF280W,THEPEAKVOLTAGEOF355VGRIDTIEINVERTERISSG250KTL,MAXIMUMPOWERTRACKINGVOLTAGERANGEDC450V880V,OUTPUTPOWER250KW,THEOUTPUTVOLTAGE270V,EUROPEEFFICIENCY983,TOTAL20GRIDTIEINVERTERSFORPVPOWERSYSTEMFEASIBILITYRESEARCHREPORTCHINAELECTRICEQUIPMENTGROUPWWWCEEGCNFIVE04/22KVDISTRIBUTIONTRANSFORMERSCONNECTSTOONE22KVDISTRIBUTIONCONNECTINGPOINT,5INPUTAND1OUTPUT,THENTOLOCAL22KVCLASSGRID162CENTRALCONTROLSYSTEMDESIGNTHEDEPARTMENTOFELECTRICPOWERINSAMOAWILLTAKECHARGEOFTHEPROJECTANDTAKEFEWPEOPLEATTENDEDMETHODTELECONTROLWORKSTATIONWILLBEUSEDINTHECONTROLROOMFORINFORMATIONTRANSMISSIONTOANDMONITORINGFROMDISPATCHINGDEPARTMENTTHEAUTOMATIONSYSTEMACHIEVES22KVLINE,THEMAINTRANSFORMERS,THECENTRALIZEDMONITORINGANDDISPATCHINGDEPARTMENTTELECONTROLMONITORINGOFACSWITCHCABINET20GRIDTIEINVERTERSWILLBEAPPLIEDINTHEPROJECTTHEMONITORINGANDPROTECTIONOFEACHINVERTERISACHIEVEDBYITSINNERDETECTINGSYSTEMANDPROTECTIONDEVICE1SETOFENVIRONMENTALMONITORINGSYSTEMISEQUIPPEDTOMONITORTHEENVIRONMENTCONDITIONSPOWERMEASUREMENTOFTHEPVPOWERSTATIONWILLBEATTHEINTERFACEPOINTTOTHEGRID163COMMUNICATIONTHECOMMUNICATIONOFSAMOAS5MWONGRIDPVPOWERPROJECTINCLUDESSYSTEMCOMMUNICATION,ADMINISTRATIONCOMMUNICATIONANDINNERSTATIONDISPATCHCOMMUNICATION164CONSTRUCTIONTHETOTALCAPACITYOFTHEPROJECTIS50176MWWITH17920280WSOLARMODULES,1120SUPPORTSOFFIXEDINSTALLATIONSTYLE,FIVE1250KVATRANSFORMERSANDINTERFACETOGRIDTHROUGH22KVCLASSPOWERLINECIVILENGINEERINGOFTHEPVPOWERSTATIONINCLUDESBASEOFPVMODULES,FIVEACANDDCPOWERDISTRIBUTIONROOMS,COMPREHENSIVEBUILDING,COMPREHENSIVEPUMPINGSTATION,SANDPROOFWALL,INSIDEROAD,ETCACCORDINGTOGB500112001),THECOMPREHENSIVEBUILDING,ACDCPOWERDISTRIBUTIONROOM,ANDCOMPREHENSIVEPUMPINGROOMSBELONGTOCCATEGORIES,SEISMICINTENSITYOF7DEGREES,THEBASICDESIGNOFTHEGROUNDACCELERATIONVALUEOF010GACCORDINGTOSITECONDITIONS,SOLARMODULEFOLLOWSTHEBASISOF50M/SDESIGNSINGLEARRAYTAKESCONCRETEREINFORCEMENTANDGRADEOFC25THEBASEIS04MMHIGHERTHANSITEAVERAGE,THEDEPTH06M,ANDTHECONCRETEPOURINGOFONEPOINTIS0256M3THEPVPOWERSTATIONINTHEWINDYAREA,THECOMBINATIONOFENGINEERINGANDBIOLOGICALMEANSWILLBEADOPTEDFORWINDPROOFATTHISSTAGETHATIS,BUILDING25MHEIGHTWALLAROUNDTHEPVPOWERSTATIONANDPLANTINGPOPLAROUTSIDEOFTHEWALLWHATSMORE,PVMODULES,SUPPORTSANDBASESARESANDPROOFDESIGNED17FIREPROTECTIONAPVPOWERSTATIONISNOTEQUIPPEDWITHFIREFIGHTINGORGANIZATION,BUTAPARTTIMEFIREFIGHTERSHOULDBEEMPLOYEDATINITIALSTAGE,FIREWILLBEHANDLEDBYPERSONNELFROMTHEINTERNALSTATION,ANDMEANWHILEWITHNOTIFICATIONOFTHELOCALFIREBRIGADETOFIGHTAGAINSTFIRESFEASIBILITYRESEARCHREPORTCHINAELECTRICEQUIPMENTGROUPWWWCEEGCNBTHEFIREENGINEERINGDESIGNOFTHEPROJECTADOPTSTHEINTEGRATEDFIRETECHNICALMEASURESINCLUDETHEFIREPREVENTION,MONITORING,ALARM,CONTROL,FIREFIGHTING,SMOKEEXHAUSTION,ANDESCAPETHEAIMISTOREDUCETHEPOSSIBILITYOFFIREONCEHAPPENS,ITCANBEEXTINGUISHEDINASHORTTIMEANDTHELOSSCANBEREDUCEDTOAMINIMUM,WHILEENSURINGTHESAFETYOFFIREEVACUATIONCPVPOWERSTATIONFIRECONTROLROOMISINTEGRATEDDESIGNEDWITHTHEMAINBUILDINGCONTROLROOMDFIREFACILITIESANDEQUIPMENTSARESETACCORDINGTOTHEIMPORTANCEOFPRODUCTIONANDTHEDEGREEOFFIRERISKEFIRESERVICEPHONEISINSTALLEDFOREACHIMPORTANTSITEINPVPOWERSTATION18ORGANIZATIONSTRUCTUREDESIGNTHESITEISNEARBYSAMOAAIRPORT,GEOGRAPHICLOCATIONIS1382S,17201WTHETRANSPORTISVERYCONVENIENT,ANDALLCONSTRUCTIONMATERIALOFTHEPROJECTCANBEPROVIDEDBYLOCALSUPPLYACCORDINGTOCONSTRUCTIONSCHEDULEREQUIREMENTS,MAINCONSTRUCTIONESTABLISHMENTARELOCATEDNEARBYTHECOMPREHENSIVEBUILDING,MAINLYINCLUDINGPRODUCINGAREA,LIVINGAREA,CONSTRUCTIONWAREHOUSE,REINFORCINGSTEELBARYARD,MACHININGFILED,TEMPORARYCONSTRUCTIONESTABLISHMENT,ETCPROJECTLANDUSAGEINSIDETHEWALLIS100000M2THETOTALCONSTRUCTIONPERIODIS10MONTHS,INWHICHTHEPROJECTPREPARATIONPERIODIS3MONTHS19CONSTRUCTIONMANAGEMENTDESIGNTEMPORARILY,THEORGANIZATIONSTRUCTUREANDPERSONNELSETOFTHISPVPOWERPLANTSHOULDREFERTOTHOSEOFSIMILARPROJECTANDBEACCORDINGTOTHEPRACTICALCONDITIONSOFTHISPROJECTTHENUMBEROFTHEPERSONNELFORTHISPROJECTSHOULDBE93OUTOF9ARERESPONSIBLEFORMANAGEMENTANDPRODUCTION,6OUTOF9ARERESPONSIBLEFOROPERATION,INCLUDING2SHIFTFOREMENAND4DUTYOFFICERSTHEFACILITIESOFTHEPVPLANTINCLUDEGENERALCONTROLBUILDING,MAINANDBACKUPELECTRICITY,ANDWATERSUPPLYFACILITYFORPRODUCTIONANDLIFE110ENVIRONMENTALPROTECTIONANDSOIL/WATERCONSERVATIONAFTERINVESTIGATINGANDANALYZINGTHELOCATIONANDSURROUNDINGAREAOF5MWPVPOWERSTATIONINSAMOA,WEFOUNDTHATBUILDINGTHEPVPOWERSTATIONWILLBRINGBOTHGOODANDBADEFFECTSTONATURALANDSOCIALENVIRONMENTONTHEONEHAND,SOLARENERGYISCLEANANDRENEWABLEENERGYITWILLIMPROVETHEQUALITYOFENVIRONMENTBYSIGNIFICANTLYREDUCINGSOLIDANDGASWASTEOFCOALFIREDPOWERPLANTWHICHCAUSEAIRPOLLUTIONMEANWHILE,ITWILLBEANEWTOURISTATTRACTIONTOPROMOTELOCALTOURISMANDECONOMYDEVELOPMENTONTHEOTHERHAND,DURINGTHECONSTRUCTIONOFTHEPVPOWERSTATION,ITWILLPRODUCEDUST,NOISE,WASTEWATERANDDAILYRUBBISHBUTTHESEBADEFFECTSCANBECONTROLLEDANDELIMINATEDBYTAKINGPROTECTIONMEASURESANDSTRICTCONSTRUCTIONMANAGEMENTFEASIBILITYRESEARCHREPORTCHINAELECTRICEQUIPMENTGROUPWWWCEEGCNINCONCLUSION,ASLONGASTAKINGPROPERPROTECTIONMEASURES,THECONSTRUCTIONOFTHE5MWPVPOWERSTATIONINSAMOAWILLNOTLEADTOANYSIGNIFICANTENVIRONMENTPROBLEMS,MOREOVER,PVPOWERISACLEANENERGY,ANDITBRINGSSUSTAINABLEUSEOFNATURALRESOURCESANDTHESOUNDCYCLEOFECOENVIRONMENTTHECONSTRUCTIONOFTHISPROJECTISFEASIBLE111LABORSAFETYANDINDUSTRIALHYGIENEACCORDINGTOTHEFEATURESOFTHISSOLARPLANT,WEHAVEDESIGNEDACOMPLETEPROJECTMONITORINGSYSTEMTOENSURETHESAFETYOFMAINBUILDINGSDURINGTHECONSTRUCTIONANDOPERATIONPERIODSWESUGGESTTHATASOUNDMONITORINGSYSTEMSHOULDBEMADETOCONTROLTHEACTUALOPERATION,COMPREHENSIVELYEVALUATETHESAFETYOFMAINPARTS,ANDCOMEUPWITHPREVENTIONANDIMPROVEMENTMEASURESTOPREVENTACCIDENTSINADVANCEDURINGTHECONSTRUCTIONPERIOD,THEMAINSAFETYPROBLEMSARETHEPOSSIBLEACCIDENTSCAUSEDBYELECTRICITYANDFIREWHICHMAYLEADTOEXPLOSIONAFTERTHEPROJECTFINISHEDANDPUTINOPERATION,THEMOSTIMPORTANTWORKFORDAILYLABORSAFETYSHOULDBETOPREVENTTHESEACCIDENTSTHEEARLYWARNINGSYSTEM,EMERGENCYRESCUEMEASURESANDPLANSSHOULDBEMADEINADVANCETOIMPROVETHEABILITYTODEALWITHHEAVYACCIDENTSTHEOCCUPATIONSAFETYANDHEALTHMANAGEMENTSYSTEMOSHMSSHOULDBEMADEANDCOMPLETEDINTHEPRACTICE,EVENTUALLYACHIEVINGTHEGOALOFPREVENTINGANDELIMINATINGACCIDENTS,OCCUPATIONALHAZARDSANDOTHERLOSS112ENGINEERINGBUDGETARYESTIMATETHEPROJECTINVESTMENTBUDGETISMADEACCORDINGTOTHENATIONAL,DEPARTMENTALANDCURRENTLYDOMESTICRELATEDREGULATIONS,COSTANDRATESTANDARDS,ETCTHEPRICEOFRAWMATERIALANDEQUIPMENTISBASEDONTHEPRICELEVELOFTHETHIRDSEASONIN2009TOTALINVESTMENTIS30,647,354USDOLLARSTHEDETAILSAREINCLUDEDINFORM9113ENERGYSAVINGANDEMISSIONREDUCTIONBENEFITSTHEAVERAGEAMOUNTOFOUTPUTPRODUCEDBYTHE5MWPVPOWERSTATIONINSAMOAWILLBE77529MILLIONKWHBASEDONNETCOALCONSUMPTIONRATE340G/KWH,EVERYYEARTHEPVPOWERSTATIONCOULDSAVE2,600TSTANDARDCOALWHICHISEQUALTO3,600TRAWCOALCOMPAREDTOCOALFIREDPOWERPLANTCORRESPONDINGLY,ITWILLREDUCETHEAMOUNTOFATMOSPHERICPOLLUTANT,INCLUDING501TSO2,067TCO,028TCNHM,283TNITROUSOXIDEWITHRESPECTTONO2,6200TCO2,AND800TGRAYCARBONRESIDUE2THECONSTRUCTIONCONDITIONSOFSAMOA21SOLARRADIATIONCONDITIONFEASIBILITYRESEARCHREPORTCHINAELECTRICEQUIPMENTGROUPWWWCEEGCNTABLE1SOLARRADIATIONDATATABLEINSAMOADAILYSOLARRADIATIONHORIZONTALKWH/M2/D01234567JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECKWH/M2/DDAILYSOLARRADIATIONHORIZONTALKWH/M2/DTABLE2MONTHLYSOLARRADIATIONCURVETABLE3OTHERMETROLOGICALDATAINSAMOAACCORDINGTOTHEDATATABLESABOVE,SAMOAISRICHFORSOLARWITHTHEDAYAVERAGEFEASIBILITYRESEARCHREPORTCHINAELECTRICEQUIPMENTGROUPWWWCEEGCNRADIATION525KWH/M2OTHERDATALIKETHETEMPERATURENEAR25,MEDIUMWINDANDRAINFALL,SHOWSTHEAREAISSUITABLEFORPVPOWERSTATIONCONSTRUCTION22LOCATIONTERM221SITELOCATIONFIG2THELOCATIONOFPVPOWERSTATION222CONSTRUCTIONSITECONDITIONSFEASIBILITYRESEARCHREPORTCHINAELECTRICEQUIPMENTGROUPWWWCEEGCNFIG3THE22KVPOWERLINELESSTHAN200METERAWAYFROMPVPOWERSTATIONARICHSUNLIGHTRESOURCESENSURINGHIGHPOWEROUTPUTBCLOSETOTHEMAINPOWERGRIDREDUCINGNEWTRANSMISSIONLINESINVESTMENTCTHEEXISTEDPOWERLINEDIAMETEROFELECTRICGRIDISSTRONGENOUGHTOCARRYTHEELECTRICITYFROMPVPOWERSTATIONWITHNORECONSTRUCTIONDSHORTDISTANCETOURBANLOADCENTERREDUCINGTHEPOWERTRANSMISSIONLOSSFEASIBILITYRESEARCHREPORTCHINAELECTRICEQUIPMENTGROUPWWWCEEGCNECONVENIENTTRAFFIC,TRANSPORTATIONANDLIVINGCONDITIONSFOPEN,FLATANDHAVEENOUGHSPACEFOREXPANSIONGCANGENERATEADDITIONALECONOMICORECOLOGICALBENEFITSTOOFFSETSOMEELECTRICITYCOSTHGOODEXEMPLARYCONDITION,SOTHATTHEPUBLICCANBEAWAREOFPVTECHANDACCEPTIT,ANDMAKECERTAINDEGREEOFINTERNATIONALINFLUENCE223GEOGRAPHICALLANDFORMSFIG4SITELANDFORMSOF5MWPVPOWERSTATIONINSAMOA224GEOLOGYCONDITIONSSAMOAISLOCATEDINOCEANIA,GROUPOFISLANDSINTHESOUTHPACIFICOCEAN,ABOUTHALFWAYBETWEENHAWAIIANDNEWZEALAND,INTHETIMEZONEGMT11THECOUNTRYHASACOASTLINEOF116KMITHASLITTLESEASONALTEMPERATUREVARIATIONITSRAINYSEASONISFROMNOVEMBERTOAPRIL,DRYSEASONFROMMAYTOOCTOBERITHASLIMITEDNATURALFRESHWATERRESOURCESTHEWATERDIVISIONOFTHEGOVERNMENTHASSPENTSUBSTANTIALFUNDSINTHEPASTFEWYEARSTOIMPROVEWATERCATCHMENTSANDPIPELINESACCORDINGTONASASOLARRADIATIONDATAMEASUREDINTHEPAST30YEARS,THEAVERAGEAMOUNTOFSOLARRADIATIONIS6,9081MJ/M2,THEAVERAGEHOURSOFSUNSHINEARE3,313HOURS225SITECONCLUSIONFEASIBILITYRESEARCHREPORTCHINAELECTRICEQUIPMENTGROUPWWWCEEGCNINCONCLUSION,ITISFEASIBLETOBUILDPVPOWERSTATIONINTHISAREABUTITISNECESSARYTOCONSIDERTHECORROSIONOFMATERIALANDSHELLOFEQUIPMENTSBECAUSEOFSALINEALKALIEFFECTNEARTHESEA23METEOROLOGYCHARACTERISTICPROVIDEDBYCUSTOMERS,10YEARMETEOROLOGYDATAEXTREMEORHISTORICALRECORD231THESTATISTICSOFMAJORMETEOROLOGYDATA232THEFEATUREOFTEMPERATURECHANGE233THEMAXIMUMWINDSPEEDWITH50YEARS3THEBASICCONDITIONSOFELECTRICPOWERGRIDINSAMOAPROVIDEDBYCUSTOMER31BASICCONDITIONSOFPOWERCONSTRUCTION32SUPPLYCONDITIONOFPOWERSYSTEM33DEMANDCONDITIONOFPOWERSYSTEMNEEDBALANCETABLEOFELECTRICPOWER34THEPROBLEMOFPOWERSYSTEM35THEDEVELOPMENTPLANOFPOWERSYSTEM4DESIGNOFPVPOWERSTATIONSAMOAS5MWPONGRIDPVSYSTEMTAKESDISTRIBUTEDGENERATIONANDCENTRAL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