1MW PV Project in Nigeria.docx

1MW PV Project in Nigeria.docx

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1MWPVProjectinNigeria

1MWpPhotovoltaicProject

inNigeria

InitialSystemDesign

Designed:

Liyunxia

Audited:

Approved:

Xudongxu

BaodingZhongtaiNewEnergyTechnologyCompanyLimited

April,2018

Contents

1ProjectIntroduction

1.1Projectname

The1MWPhotovoltaicprojectinNigeria.

1.2Workingenvironmentandconditions

（1）Latitudeandaltitude:

04°46′N，007°00′E;

（2）ThemeteorologicaldatashowninbelowisreferredtotheNASAdatabase.

Table1.SolarRadiationinkWh/m2/day

Radiationfallingonahorizontalsurface（fromNASAsatellitemeasurements）

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Avg

4.13

4.32

4.23

4.29

4.13

3.82

3.51

3.29

3.79

3.89

3.98

4.15

3.96

2IntroductionofPhotovoltaicoff-gridsystem

2.1PrincipleofPhotovoltaic-dieselbybridpowersystem

Assolarphotovoltaic-dieselbybridpowergenerationsystem,Indaytime,PVmodulessupplypowertoloadsofrespectivemodule/buildingbymeansofinverter,andexcesspowerwillbedeliveredtobatterybankandACgridtosupplyforothermodule/buildingload.Batterydischargedbymeansofsunnyislandtosupplypowerforthesemodule/buildingsloadthroughACgridwhenthereislittleornosolarirradiationorhighconsumption.Wheneverbatterypowerisbelowthesetpoint,i.e.batteriesdrainedbeyondcertainlimit（e.g.60%）ofitscapacity,theconnectedsunnyislandwillautomaticallygenerateandtransmitasignaltostartthestand-bygenerator,supplyingpowertotheACgrid,andchargingthebatterybankatthesametime.Itmainlyconsistsofsolarmodule,storagebattery,energystorageinverter,dieselgeneratorandsoon.Throughtheengineeringdesign,allpartsaboveareassembledawholeequipment.

Inaddition,therearesomeotherderivedoff-gridsystems,suchasthewind-PVhybridpowersystem,PV-electricityhybridpowersystem,light-woodhybridpowersystem,thewind-PV-woodhybridpowersystem,etc.

2.2Introductionofmaincomponentdevices

PVmodule:

Thesolarmoduleismanufacturedbycrystallinesiliconinaccordancewithphotovoltaiceffect.Thefunctionisconvertedsolarenergytoelectricenergy.Modulescanbeconnectedinserialsorparallel.

ThePVmodulesaremadeofcrystallinesiliconinaccordancewithphotovoltaiceffect,whosefunctionareconvertingsolarenergytoelectricenergy.Andthemodulesshouldbewind-,water-andsnow-resistant.Ifnecessary,modulescanbeconnectedinserialsorparallelaccordingtotheactualsituation.

StorageBattery:

usedtostoreenergyconvertedfromPVmoduleandsupplypowertoloadatanytime.Batteriescanbeconnectedinserialsorparallelaccordingtotheactualcondition.

TheInverter（controllerbuiltin）:

contoller:

directlyitcansupplyforDCload,andmonitorthebatteryvoltageandreasonablycontrol,andpreventstoragebatteryoverchargingoroverdischarging.Generallyitalsocanmeasuresimply.Thecontrollerisveryimportantforaoff-gridsystemasoverchargingandoverdischargingwillbeharmforthelifeofstoragebattery.inverter:

thedevicethatconvertstheDCelectricpowertoACelectricpower.

3Designscheme

3.1Projectstandardanddocuments

GB/T9535-1998Crystallinesiliconterrestrialphotovoltaic（PV）modules-Designqualificationandtypeapproval

GB/T18479-2001Terrestrialphotovoltaicpowergeneratingsystemgeneralandguide

GB50054-95Codefordesignoflowvoltageelectricalinstallations

GB50057Designcodeforprotectionofstructuresagainstlightning

GB50303Codeofacceptanceofconstructionqualityofelectricalinstallationinbuilding

GB50168Codeforconstructionandacceptanceofcablesystemelectricequipmentinstallationengineering

GB50169Codeforconstructionandacceptanceofgroundingconnectionelectricequipmentinstallationengineering

GB50205Codeforacceptanceofconstructionqualityofsteelstructures

IEC61215Crystallinesiliconterrestrialphotovoltaic（PV）modules-designqualificationandtypeapproval

GB/T15543ElectricEnergyQuality—three-phasevoltageimbalance

IEC61683Photovoltaicsystems-Powerconditioners-Procedureformeasuringefficiency

IEC61724Photovoltaicsystemperformancemonitoring-Guidelinesformeasurement,dataexchangeandanalysis

GB/Z19964-2005TechnicalruleforconnectingPVpowerstationtoelectricpowersystems

GB/T20046-2006InterfaceFeaturesofPVsystemgrid

3.2Designprinciple

Thisdesignfocusesonthefollowingprinciples.

∙Advancement

Asthedevelopmentofheliotechnics,theadvancementshouldbeconsideredtoensuretheleadingpositionofproductinacertainperiodandlengthenitslifecycle.

∙Practicality

Thisdesignshouldadoptadvancedandmaturetechnologytoensureproduct’sstability,reliabilityandmaintainability.

∙EconomicalEfficiency

Withthepreconditionofensuringthetechnicalindexofphotovoltaicsystem,we,makeourefforttoreduceengineeringandfacilitycosts,improvesystemcostperformancetoguaranteeinvestmentbenefitoftheprojectowner.

3.3Informationofuser'sload

Table2.Theuserloadinformation

powerconsumption（kWh）

Asfollowingtable

Workingvoltage

DCside（V）

ACside（V）

Workingtime（h）

Asfollowingtable

Daysforstand-by（H）

12

Location

143°14′41.84″E,

9°05′06.94″S

Dailysolarradiation（h）

5.00

Table3.termwisestatisticsofload

Loadname

Ratedpower（W）

Quantity

Workingtime（h）

Totalpower（kW）

powerconsumption（kWh）

Total

12

500

6,000

3.4Calculationsofsystemdesign

Inordertomeettheinstallationcapacity,thesystemconfigurationdesignplanisasfollowing:

1.Calculationofstoragebatteries’capacity

Daysforstand-by:

0.5Days

Cbat=powerconsumptionofload×daysforstand-by÷systemvoltage÷depthofdischarge

=8.4×1000W×4.5÷48V÷0.7

=1125Ah

Thechosenstoragebattery:

Modelnumber:

2V/3000Ahvalve-regulatedGELbattery

Capacity:

3000Ah

Numberofbattery:

1450pcs，290pcsinserial

2.Configurationofsolarmodules’capacity

Totalpowerofmodules=1,000,000Wp

Model:

ZT320P-35b（polycrystallinesilicon）

Capacity:

320Wp

Quantity:

3140pcs（20pcsmodulesinserial）

Efficiencyofoff-gridsystemη=0.75.

3.CalculationofInverters’capacity

Ratedvoltage:

DC580V

Outputpower:

500KW

Thechoseninverter:

Model:

SC500TL

Quantity:

1pcs

3.3Technicalparametersofmaindevices

（1）Technicalparametersofbattery

Model:

CFM-3000

1

RatedcapacityatSTCC10

3000Ah

2

RatedvoltageatSTC

2V

3

Selfdischargerate（28days/25℃）

<1%

4

Cyclelife

≥2200

5

Environmentaltemperature（℃）

-20℃～+60℃

6

Dimension（W*H*D）

696×344×330mm

7

Weight

kg

8

Altitude

＜5000m

（2）TheparameterofPhotovoltaicmodules

Theparameterofphotovoltaicmodules

1

Category

Multicrystalline

2

Manufacturer

Zhongtaisolar

3

Moduletype

ZT320P-35b

4

Index

Unit

Parameter

5

Peakpoweroutput

Wp

320

6

OpencircuitvoltageVoc

V

46.4

7

ShortcircuitcurrentIsc

A

9.05

8

VoltageatPmax,Vmppt

V

37.4

9

CurrentatPmax,Imppt

A

8.56

10

Dimension

mm

1960×990×40

11

Weight

kg

25.5

（3）TheparameterofInverter

Model：

SC500TL

1

DCvoltageRange

500-800V

2

Max.DCcurrent（A）

1100A

3

NominalACpower

500KW

9

MAX.ACpower

550KVA

11

MAX.ACCurrent

1008A

NominalgridVoltage

315V

GridVoltageRange

252-362V

NominalgridFrequency

50-60Hz

Max.efficiency

98.2%

12

Environmentaltemperature（℃）

-30～+55

13

Enclosure

IP21

14

Netweight（kg）

1300

15

Dimension（W*H*D）

1606×2034×860mm

3.4Collectionplaneorientation

1

Tilt

5deg.

2

Azimuth

0deg.

4.ListofdevicesandQuotationofproject

NO.

Name

Specification

Quantity

Unit

Note

1

Module

320Wp

3140

pcs

2

Combinerbox

12in1our

14

pcs

3

Inverter（controllerinbuilt）

400V/500kW

1

pc

4

GELbattery

2V3000AH

1450

pcs

5

Transformer

33kv

1

pc

6

Mountingbrackets

1000000

Wp

7

Cables

1000000

Wp