光伏电站概述

TheSchoolofRenewableEnergyNorthChinaElectricPowerUniversityEnergyEngineeringandAutomationDepartmentSolarEnergyCenter

HongluZhuPh.D.CellPhone:+8618600551350Email:hongluzhu@,cn光伏电站概述TheOverviewofPhotovoltaicPowerPlants内容Contents:光伏系统的工作原理:PrincipleofPVsystem光伏电站的建设流程:ConstructionProcessofPVplants光伏电站的设计:theDesignofPVplants光伏电站的验收:AcceptanceofPVplants光伏电站的维护:MaintenanceofthePVplants光伏发电系统介绍什么叫光伏发电系统？WhatisthePVpowersystem? 将太阳能转换为电能的发电系统。其中包括方阵子系统、功率平衡子系统、储能子系统等。Thepowergeneratingsystemwhichconvertsolarenergyintoelectricity

power.

光伏发电系统分类theclassifyofPVpowersystem:

光伏发电系统按与电力系统之间的联系分类，通常分为thePVsystemisconnectedtopowergrid?

独立系统:

stand-alone

photovoltaic

system 并网系统:

grid-connectedPhotovoltaic

system

光伏发电系统分类theclassifyofPVpowersystem:

stand-alonegrid-connected

独立光伏发电系统Stand-alonePVsystem

光伏独立发电系统一般由五部分组成Stand-alonePVsystemisconsistedof：①太阳电池方阵PVarray；②控制器Controller；③蓄电池storage

battery；④逆变器inverter；⑤负载theload

独立光伏发电系统Stand-alonePVsystem：PVarray

独立光伏发电系统—蓄电池Stand-alonePVsystem：batteryWhyusingBattery：storagepowerenergywhenthepowerfromPV>loadpower

独立光伏发电系统—控制器Stand-alonePVsystem：controllerPhotovoltaiccontrollerisusedforsolarpowergenerationsystem,tocontroltheenergyflowfromthesolartothebatteryortothesolarpowerinvertertotheload.

独立光伏发电系统—逆变器Stand-alonePVsystem：inverter

Function:PV/Batterout:DC->ACLoadAdvantageofAC：——大量通用家用电器都可以使用Mostoftheload’sinputisAC——易于进行输变电easyfortransmission

独立光伏发电系统—逆变器Stand-alonePVsystem：inverter

并网光伏发电系统:

grid-connectedPVsystem光伏并网发电系统一般由四部分组成includes：①太阳电池方阵PVarray；②并网逆变器grid-connectedinverter；③计量电表electricitymeter；④电网powergrid并网光伏发电系统—方阵连接盒grid-connectedPVsystem--DCjunction

box光伏并网发电系统一般由五部分组成：①太阳电池方阵；②连接器；③并网逆变器；④计量电表；⑤电网1,connectingofPVarrayandinverter2,protectionfunction:over-loadprotection,lightingprotection并网光伏发电系统—并网逆变器grid-connectedPVsystem–grid-connectedinverterDC-AC;MaximumPower

Point

Tracing;keepsamephasewithgrid(frequency50hz?,voltage220,phase°：degree)并网光伏发电系统—大型荒漠电站Desertplant关键设备和技术难点

technical

difficulties：

光伏组件PVmodule、逆变器inverter、自动跟踪系统trackingsysytem、电站工程建成construction、并网接入系统grid。并网光伏发电系统—大型光伏电站特点featureofDesertplant1、电流是单方向的,没有储能系统；

one-waycurrent,noenergystorage.2、并入中高压电网（10kV，35kV，110kV);connecttogridathighvoltage3、不能自发自用和“净电表计量”，只能给出“上网电价”；cannotprovideenergytotheplant4、少量自用电从电网取（小于1%）（BIPV的大部分电自用）auxiliary

powerisfromthegrid5、一般功率很大，1MW以上；big

installed

capacity

>1MW并网光伏发电系统—大型光伏电站特点featureofDesertplant6、一般都是无人值守；unattended

plant7、要求离负荷中心较近，就地消化；neartheload8、一般占用荒地；usewasteland9、自动跟踪或聚光电池一般都是用在荒漠电站；goodsloarresource,canusetrackingsystemorCPV（concentrating）10、带有气象和运行数据自动监测系统和远程数据传输系统。（remotemonitoring）一、大型并网光伏电站组成大型并网光伏电站系统框图FramworkofLargePVplant

光伏阵列将太阳能转变成直流电能，经逆变器的直流和交流逆变后，根据光伏电站接入电网技术规定光伏电站容量确定光伏电站接入电网的电压等级，由变压器升压后，接入中压或高压电网。大型光伏电站的系统组成large

PVplant光伏方阵（固定或跟踪）pvarray汇流箱junctionbox直流配电柜DCcabinet并网逆变器inverter交流配电柜ACcabinet电网接入系统（升压、计量设备等）tranformer交/直流电缆cable监控及通讯装置monitoringsystem防雷接地装置:groudedsystem一、大型并网光伏电站组成

1.光伏方阵PVarray:光伏方阵分为两类：固定式和跟踪式twotypes:fixedandtracking单轴跟踪系统one-axistracking双轴跟踪系统:twoaxistracking固定式——钢管埋地固定式——fixed大型并网光伏电站组成componentofthelargePVplant

光伏组件常见分类PVmodule

单晶硅组件singlecrystal多晶硅组件polycrystalline

非晶硅组件amorphous大型并网光伏电站组成componentofthelargePVplant

不同辐照度下电流和功率与电压的特性曲线（100%，80%，50%）differentradiation

intensity不同温度下电流和功率与电压的特性曲线（25℃，50℃，75℃）Differenttemperaturecharacteristic

curveofaPVmodule:MPPT光伏方阵由光伏组件通过串联和并联形成。moduleinseriesandparallelformthePVarray光伏组件串联示意connected

in

series光伏组件并联示意connected

in

parallel大型并网光伏电站组成componentofthelargePVplant:PVarray:2、pvarrayjunctionbox八进一出汇流箱十六进一出汇流箱大型并网光伏电站组成componentofthelargePVplant:PVarray:

集中式并网逆变器centralizationtype组串式并网逆变器stringtype大型并网光伏电站组成componentofthelargePVplant:inverter

内容Contents:光伏系统的工作原理:PrincipleofPVsystem光伏电站的建设流程:ConstructionProcessofPVplants光伏电站的设计:theDesignofPVplants光伏电站的验收:AcceptanceofPVplants光伏电站的维护:MaintenanceofthePVplants电站建设流程

ProjectConstructionProcess项目筹备

ProjectPreparation可利用的地面

Availableground较好的日照条件

Goodsunshinecondition良好的政策环境

Policyenvironment良好的电网条件

Electricgridconditions投资收益保障

Earningsofinvestor资金实力

Enoughfunds项目实施能力

Projectimplementationability

产业带动能力

Industrydriveability项目筹备

ProjectPreparation可利用的地面

Availableground较好的日照条件

Goodsunshinecondition良好的政策环境

Policyenvironment良好的电网条件

Electricgridconditions投资收益保障

EarningsofinvestorPreliminaryDesign(Investorjob):overalldesign,gettheapprovalfromlocalgovernment--ticket项目筹备

ProjectPreparationHowtogetthe“ticket”engineeringconsultationorganiztationLocalgovernmentinvestorprovincialgovernment项目筹备

ProjectPreparation“ticket”isok,getapprovalfromrelativeorganizationsPlanningBureauLandandResourcesBureauPowerOfficeEnvironmentalProtectionAgencyWorkSafetySupervisionBureauWaterConservancyBureauForestryBureauCulturalRelicsBureau项目立项

ProjectApprovalengineeringconsultationunitProjectApprovalapprovalfromrelativeorganizationsProjectApprovalprojectreportsDevelopmentandReformCommission项目建设

ProjectConstruction:Step1.ProjectdesignSitesurveyGeographicsurveyWater,powerandtransportationsurveyAdjoiningpowerloadConnecttopowergridPrimarydesignDetaileddesigncoordinate

localelectriccompanytoensurethatthepowerisgotongridsmoothlycoordinatecoordinatelocalelectriccompanytoensurethepowergetsongridsmoothlyTheoverallsystemdesign(size,arrangement,andequipmentselection)Bedesignedinaccordancewiththedevicetype,model,etc.confirmedbythebidding项目建设

ProjectConstructionDesignforPhotovoltaicPowerPlantsSystemdesignArraydesignElectricaldesignAccessorysystemdesign项目建设

ProjectConstructionConstructionlicensesFortheconstructionsideLandusecertificateLandusepermitcontractrecordConstructiondrawingsreviewWorksafetylicenseSupervisionplanConstructionfund并网验收ConnecttothePowergridandAcceptanceProjectConstructionisdone,then?ConstructionunitBureauofQualitySupervisionPowerengineeringmanagementdepartmentProjectcompletionacceptancematerialsPowerengineeringmanagementdepartmentPASSProjectcompletionrecord内容Contents:光伏系统的工作原理:PrincipleofPVsystem光伏电站的建设流程:ConstructionProcessofPVplants光伏电站的设计:theDesignofPVplants光伏电站的验收:AcceptanceofPVplants光伏电站的维护:MaintenanceofthePVplants光伏电站的设计

DesignforPhotovoltaicPowerPlants敦煌DunhuangDunhuangCavesCrescentSpringSingingSandsMountain总体技术方案

“集中安装建设,多支路上网”

:co-installation,connectedtothegridindependently

.Theinstalledcapacityis8MWp.

●在电气线路上,分为8个独立的1MWp分系统,分别发电上网;

8X1MWpsystem,connecttothegridindependently.

●1MWp分系统包括5个200kWp的发电单元、一台1000kVA变压器;

1MPpsystem,consistsof5X200kWpunit，a1000kVAtransformer.

●每个发电单元由200kWp组件、200kVA并网逆变器组成,输出0.4kV三相交流电

200kWpconsistsof200kWpPVmodule,200kVAgrid-connectedinverter,theoutputis0.4KV.

:overalltechnicalprogram总体技术方案

特点Feature:

●每个200kWp的发电单元即是一个低压并网光伏发电系统

Each200kWpunitisalowvoltagegrid-connectedPVpowersystem.*直接并网给用户供电,supplyelectricityforuserstroughthedirectgrid.*经变压器升压后并入高压电网Incorporatedintothehighvoltagepowergridafterbeenstepped-upbytransformers.

●8个独立的1MWp并网光伏分系统之间没有任何电气联系. 8X1MWpsystemsareofnoelectricalconnection.*可分别实施工程建设及运行与维护管理;carryoutprojectconstructionandoperation,aswellasthemaintenancemanagementindependently.*局部故障检修时不影响整个系统的运行.failuremaintenancedoesnotaffecttheoperationoftheentiresystem.

●可灵活地以各种“交钥匙工程”方式进行项目建设:theprojectconstructioncanbecarriedoutbyturn-keyprojectmethodsinflexibalways.

8X1MWpsystemscanbeconstructedbydifferentinvestor/constructor.*整体承包、分系统承包、单个发电单元分包等.Overallcontracting,sub-systemscontracting,subcontractingofasinglepowergenerationunit

●便于进行各种不同元器件设备、不同技术设计的技术经济性能评估.technicalandeconomicevaluationsofdifferentcomponents,equipment

areeasilytobeimplemented.*国产设备和进口设备;Domesticequipmentandimportedequipment*晶体硅、非晶硅、及其他组件;Crystallinesilicon,amorphoussilicon,andothermodules*不同安装方式(固定式、单轴跟踪及全跟踪等)Differentinstallationmethods(fixed,single-axistrackingandfulltracking,etc.):overalltechnicalprogram图1.单个发电单元原理框图200kwpPV

unit

图21MWp并网光伏发电分系统原理框图

1MWPPVsystem

200kPw

PVmodulejunctionboxinverterpowerdistributioncabinettransformeroutputhigh-voltageswitchandlightningpreventing图38MWp并网光伏发电系统原理总框图8MWpPVpowerplant二.系统构成Systemcomponents

●光伏阵列PVarray:

包括太阳电池组件、支承结构(支架及基础等)、接线箱、电缆电线等;Includingsolarmodules,supportstructure(supportandthebase,etc.),junctionboxes,cables,wires,etc.;

●直流-交流逆变设备DC-ACinverter:

包括直流屏、配电柜、并网逆变器等;IncludingtheDCpanel,powerdistributioncabinets,grid-connectedinverter;

●升压并网设施boostertransformer:

包括升压变压器、户外真空断路器、高压避雷器等;Includingboostertransformer,outdoorvacuumcircuitbreakers,highvoltagesurgearresters

●控制检测系统Control&monitorsystem:

包括系统控制装置、数据检测及处理与显示系统、远程信息交换设备等;

Includingthesystemcontroldevice,datachecking,andprocessinganddisplaysystem,remoteswitchingequipment,etc.;●附属设施Affiliated

facilities:

防雷及接地装置、清洁设备、厂房及办公室、围栏、通道及道路等.Lightningprotectionandgroundingequipment,cleaningequipment,plantandoffice,fence,channelsandroadsetc.三.发电量预测EnergyProductionCalculation

1.

气象资料Meteorologicaldata表1.敦煌地区太阳辐射数据表MeteorologicaldataofDunhuangmonthradiationintensitytemperature

2.并网光伏系统的效率分析efficiencyofgrid-connectedPVsystem

1).光伏阵列效率efficiencyofPVarray,η1:

◆

光伏阵列在1000W/㎡太阳辐射强度下,实际的直流输出功率与标称功率之比.

光伏阵列在能量转换与传输过程中的损失包括:Photovoltaicarrayundersolarradiationintensityof1000W/㎡,theratiooftheactualDCoutputpowerandnominalpower.Thephotovoltaicarraylossesinenergyconversionandtransferprocess,includes:▂组件匹配损失:对于精心设计、精心施工的系统,约有4%的损失;Dis-matchinglosses:Forwell-designed,well-constructedsystem,thelossisabout4%;

▃

太阳辐射损失:包括组件表面尘埃遮挡及不可利用的低、弱太阳辐射损失,取值5%;Lossofsolarradiation:duethedustonthecell ▅偏离最大功率点损失:如温度的影响、最大功率点跟踪(MPPT)精度等.取值4%;becauseofdeviationfromthemaximumpowerpoint:suchastheinfluenceoftemperature,maximumpowerpointtracking(MPPT)accuracyandsoon.thelossis4%

█

直流线路损失:按有关标准规定,应小于3%.DClinelosses:accordingtotheregulationsofrelevantstandards,thevalueshouldbelessthan3%.

得:η1=96%×95%×96%×97%=85%2).逆变器的转换效率efficiencyofinverter,η2:◆

逆变器输出的交流电功率与直流输入功率之比.ratioofInverteroutputACpowerandDCinputpower.

对于大型并网逆变器,可取η1=95%.Forlarge-scalegrid-connectedinverter,thevaluecanbe95%3).交流并网效率efficiencyoftransformer,η3:

◆

从逆变器输出至高压电网的传输效率,其中最主要的是变压器的效率.可取η3=5%.fromtheinverteroutputtothehighvoltagepowertransmissionefficiency,theefficiencyofthetransformeristhemostimportantone.theefficiencycanbe5%●系统的总效率等于上述各部分效率的乘积,overallefficiencyofthesystemisequaltotheproductoftheefficiencyfordifferentparts

:η=η1×η2×η3=85%×95%×95%=77%3.敦煌8MWp并网光伏发电系统发电量测算

Generatingcapacityofthe8MWpgrid-connectedPVsysteminDunhuang:

●依据:◆敦煌地区太阳辐射量radiationintensityofDunhuang

◆系统组件总功率8MWptheModuleoverallpoweris8MWp

◆

系统效率77%overallefficiency

is77%

●光伏阵列倾角等于40°,固定式安装:Angleofinstallationis40°.

◆年发电量约1,392万千瓦小时;annualenergyoutput13,920,000KWh

◆25年的总发电量约为3.2亿千瓦小时,年平均发电1,280万千瓦小时

(按25年输出衰减15%计算).totalpowergenerationof25yearsisabout320millionkilowattshours,theaverageannualpowergenerationis12.8millionkilowatt-hours(outputattenuation[ə,tenju'eiʃən]of25yearsiscountedas15%).

●有关资料表明relavantdatashows:

◆单轴跟踪阵列比固定倾角安装的年发电量增加约20%,

theannualpowergenerationamountofThesingle-axistis20%higherthanthenumberofthefixedinstalledgeneratingcapacity

◆

双轴跟踪比固定倾角安装年发电量增加30%以上.

theannualpowergenerationamountofDoubleaxestrackingsystemis30%higherthanthenumberofthefixedinstalledgeneratingcapacity

表5.敦煌8MWp并网光伏发电系统发电量测算表(单位:万kWh)Table5.calculationofenergyproductionfor

TheDunhuang8MWpPVplant(Unit:millionkWh)说明:1.此表根据敦煌地区的气象资料,按系统效率77%计算.Note:(1)ThistableisbasedonthemeteorologicaldataoftheDunhuangregion,systemefficiencyiscalculatedby77%2.根据有关资料,单轴跟踪比固定倾角增加约20%,双轴跟踪比固定倾角增加30%以上.(2)Basedonthedata,singleaxistrackinghas20%greaterincreasethanthefixedinclinationinstalledones,andthenumberfordual-axistrackingsystemismorethan30%.monthFixed0°Fixed40°angleadjustinganglemonthlysingleaxisDoubleaxes1.

主要设备选项

EquipmentSelection

1).太阳电池组件PVmoudle:

国产160Wp多晶硅太阳电池组件.Domestic160Wppolysilicon

solarcellmoudle2).并网逆变器inverter:

性能可靠、效率高、可进行多机并联的进口产品，额定容量为200kW.itisanimportedproductwhichisreliable,highlyefficientandisabletobeconnectedwithmultimachines.3).交流升压变压器boostertransformer:

国产(0.4)KV/(35-38.5)KV电力变压器,容量1000KVA.domesticpowertransformer,thecapacityis1000（kilovolt-ampere）4).避雷装置lightningarrester:

装设避雷设施防直接雷击,并需有良好的接地.lightingarresterisinstalledtopreventdirectlightningstrokeandagoodgroundingisneeded.表6.太阳电池组件性能参数表Table6.parametertableof

PVarray表7.并网逆变器性能参数表inverterparemetersofPVarrayPeakvoltage:160 Peakcurrent:5.08 Ratedworktemperature:43.6 Windresistanceorsurfacepressure:2400Pa,130km/h insulatingstrength: DC3500V,1min,currentleakagelessthanorequalto50microampere impactstrength: Steelballwithweightof227gramfreefallsfromaheightof1meter,nodamagewillcausedonthesurface contourdimension:1587*790 weight:15.00 paremetersofinverterRatedcapacity:200KW Maximuminputpower:245KWp Maximuminputvoltage:880V RangeofMPPTinputvoltage:450V-800V Maximuminputcurrent：472A OutputACvoltage：three-phase415V(10%error) Outputfrequencyandrange:50Hz(1%error) waveformdistortion:lessthan3% Powercoefficient:100% Conversionefficiency(resistiveload):morethan90%dependondifferentResistiveloadcontourdimension:2000*2100*800 weight:1400kg

2.太阳能电池方阵设计DesignofPVarray

1).200kWp发电单元的光伏方阵设计:Designof200kWpPVarray●18块组件串联得到逆变器所要求的电压

18PVmodulesconnectedinserieswillgettherequiredvoltageoftheinverter.

验算checkingcomputations:▲maximumoutputvoltage最高输出电压=792V;▲最大功率点电压voltageatthemaximumpowerpoint=640.8V;▲组件结温比标准状态升高70℃时,最大功率点电压=461V.

whenmodualejunctionstemperatureincreasesby70centigrade,thevoltageatmaximumpowerpointequalsto461volt

inputvoltageofinverter逆变器输入电压(450-800V),maximuminputvoltage,itwillmeettheoperatingrequirementoftheinverter最大输入电压(880V),满足逆变器使用要求。●70路并联组成200kWp发电单元70connectedinparallelwillcomposeageneratingunitof200kWp

▲单个发电单元的容量为capacityofeachgeneratingunitis：70×18×160Wp=201,600Wp=201.6kWp

2)40个发电单元组成8MWp并网系统

,40X

200kWpunitbuildthe8MWsystem

▲系统总容量thetotalcapacityofthesystem:P=40×201.6=8,064kWp

▲需用

160Wp太阳能电池组件总数量totalrequirednumberof160Wpsolarmodules:M=40×70×18＝50,400（块）200kWp发电单元的光伏阵列布置图(左)

Layoutof200kwPVarrayforgeneratingunit(left)1MWpPVarray分系统的光伏阵列排布图

(下)

Layoutof1MWPVarrayforsubsystem(right)forageneratingunitof200KW,thereareintotal35holdersand70modulesconnectedinseries8MWp并网光伏系统光电场平面布置全图planofPVpowerplant说明:

光电场占地总面积atotalareaofPVpowerplant558×552=308,016㎡

房屋建筑总占地面积totalareaofhousingconstrcution:3,000㎡

图中inthepicture:1-南大门southgate2-机房控制室及办公室computercontrolroomandoffice3-升压变电站Step-upsubstation4-东大门eastgate内容Contents:光伏系统的工作原理:PrincipleofPVsystem光伏电站的建设流程:ConstructionProcessofPVplants光伏电站的设计:theDesignofPVplants光伏电站的验收:AcceptanceofPVplants光伏电站的维护:MaintenanceofthePVplants1、光伏电站常见问题:thefailureofPVplantFailurereason:•设计10%•施工和安装9%

•关键设备46%（组件、逆变器等）•运行和维护35%1、光伏电站常见问题-设计问题thefailureofPVplant:design设计阶段现场勘探不足Failurecausedbysurvey倾角设计问题angles

problem1、光伏电站常见问题-设计问题thefailureofPVplant:design布线不规范cabling

problem1、光伏电站常见问题-施工问题thefailureofPVplant:construction等电位连接焊接不规范equipotential

groundedconnecting1、光伏电站常见问题-施工问题thefailureofPVplant:construction绝缘电阻过低insulation

resistanceistoolow1、光伏电站常见问题-施工问题thefailureofPVplant:construction接线处置不当wiring

problem1、光伏电站常见问题-施工问题thefailureofPVplant:construction支架选型不当mounting/support

systemproblem•材质不防腐Corrosion

•强度选择不够strength

•跟踪支架可靠性差Reliabilityofthetracker

1、光伏电站常见问题-施工问题thefailureofPVplant:construction标示不符合要求Markerproblem•现场编号与图纸不符:number

•标识难持久保持nopersistent

•无安全警告标识nosecurity

identity1、光伏电站常见问题-施工问题thefailureofPVplant:construction1、文件资料documentation

s：立项审批、用地许可、并网协议、采购及承包合同、设计方案及工程图纸、关键部件技术手册和认证证书、竣工报告、系统维护手册project

approval,Permission

forlanduse,contractfromGridcompany,design

plan,

engineering

drawings,accepting

report

for

construction

projects,andsoon…2、并网光伏发电系统工程验收要求AcceptanceofthePVproject2、电站设备的合同符合性conformancewiththecontract：组件、逆变器、汇流箱、支架、交直流配电系统、监控系统等module,inverter,junctionbox,mountingsystem,AC/DCcabinet,monitoringsystem。3、系统电气设备检查checking

on

all

theelectrical

equipments.部件质量、电气接线、触电保护和接地、标签和标识quality

,wiring,groundedconnection,label..2、并网光伏发电系统工程验收要求AcceptanceofthePVproject•4、土建和支架结构检查

civil

worksandmountingsystemcheck土建和支架满足设计要求、环境要求、相关标准和法规的要求；系统应配备相应的消防设施。•5、电站电气建设与设计一致性

electrical

construction2、并网光伏发电系统工程验收要求AcceptanceofthePVproject•1、关键部件在实际运行条件下的性能测试performancetesting•2、绝缘电阻测试insulation

resistancetesting•3、接地连接电阻测试

grounding

resistancetesting

•4、电气安装一致性electrical

installation•5、系统电气效率electricalperformance•6、电能质量测试power

quality•7、跟踪系统测试trackingsystem2、并网光伏发电系统工程验收要求AcceptanceofthePVproject:testingperformancetestingforthemoduleorarray目的：通过I-V方阵测试仪测试各个支路的I-V特性曲线，从而得到该支路在实际运行条件下的最大输出功率。GettheperformanceofPVarraybyaI-Vtester测试设备：PV-8150型光伏阵列I-V特性分析测试仪2、并网光伏发电系统工程验收要求AcceptanceofthePVproject:testingperformancetestingfortheinverter目的：通过功率分析仪设备测试，确定逆变器在实际运行条件下的转换效率。GettheConversion

efficiencyoftheinverterbyapower

analyzer测试设备：功率分析仪2、并网光伏发电系统工程验收要求AcceptanceofthePVproject:testing绝缘电阻测试insulation

resistancetesting目的：检查光伏方阵场的电气安全性能符合要求；从而保证方阵场中人员和设施的安全。Reachtherequirementof

electrical

safetytesting

standards测试设备：绝缘耐压检测仪

2、并网光伏发电系统工程验收要求AcceptanceofthePVproject:testing接地连接电阻测试grounding

resistancetesting

byearth

resistance

tester目的：通过接地电阻测试，判断方阵接地连续性是否符合要求，排查接地断路情况。测试设备：接地电阻测试仪

2、并网光伏发电系统工程验收要求AcceptanceofthePVproject: