validating mathematical method for characterization.ppt

Characterizing solar cells involves determining their efficiency, performance, and other critical parameters under various conditions. Mathematical modeling is a vital tool in this process, allowing researchers to predict the behavior of solar cells and optimize their designs. Validating these mathematical methods is essential to ensure their accuracy and reliability.

1. Presentedby
Khaled TEFFAH
Algerian Space Agency (ASAL)
Validating Mathematical Method
for Characterization of Aerospace Solar Cells
May 2024

2. Content
Motivation
Introduction to the Present Work
AdoptedMethod For Solar CellCharacterization
Resultand Validation of the Method
Conclusion and Future work
General overview
Solar Cells to be characterized
Equivalent Circuit
Governing Equations
The extracted parameters of each of Solar Cells
Characterization of Solar cells

3. Motivation
Why characterizing a solar cell through
their equivalent circuit?
1

4. Solar Cells in
Aerospace Applications
Motivation
2

5. Motivation
Equivalent Circuit
1.Single-junctionSolarCellEquivalentCircuit:Theequivalent
circuitofasolarcellaidsinvisualizingandunderstandingits
behavior,furnishingcrucialinsightsthatcanhelpenhancing
efficiency.Figuredowndepictstheprevalentequivalentcircuitof
asinglejunctionsolarcellemployingadiodeandresistance.
Referredtoasafive-parametermodelinnumerousliteratures,it
comprisesparameterssuchas,Irs,Rsh,Rs,n,andIph,which
represent,thesaturationcurrent,theshuntresistance,series
resistance,idealityfactorandphotocurrent,respectively.
3

6. Motivation
Equivalent Circuit
2.Triple-junctionCellEquivalentCircuit:
Triple-junctionsolarcellsarewidelyutilized
inaerospaceapplicationssuchassatellites,
HAPS,spacestationsandother,owetheir
popularitytotheirhighefficiency,reliability,
andresistanceinharshenvironments.
Furthermore,thesesolarcellsfeaturethree
stackedsub-cellscomposedofdistinct
semiconductormaterials.Eachsub-cell
efficientlyabsorbsspecificwavelengthsof
thesolarradiationspectrum,maximizing
energyconversion.Moreover,thetopsub-
cellcaptureshigh-energyphotons,whilethe
middleandbottomsub-cellsabsorblower-
energyphotons,therefore,thisstrategic
combinationempowerstriple-junctioncells
tooutperformsingle-junctionsolarcellsin
termsofefficiency.
4

7. Introduction to the Present
Work
Thedeterminationandmonitoringoftheperformanceandefficiencyof
photovoltaiccellsingeneralinvolvestheidentificationofanumberof
parameterssuchastheseriesresistance(R
s),theshuntresistance(R
sh),the
saturationcurrent(I
s),theidealityfactor(n),andothers.
Intheliterature,severalmodelsandmethods(numerical,analytical,etc.)
havebeenpresentedfortheextractionoftheseparameters.Someofthese
methodspresentsadvantagesanddisadvantage,intermsofcomplexityof
use,precision,convergenceandspeed.
Inthisstudy,aninvestigationaimstoassessthevalidityofthismethod
acrossdiversetypesofaerospacetriple-junctionsolarcellsbesidesatesting
ontheThinFilmSolarCellmountedonthesolarcellmoduledeployed
aboardtheAlgerianCubeSatALSAT-1N.
5

8. Proposed Method for
Parameters Exctraction
TheadoptedmethodhasbeenproposedbyS.Chtitaetal.,whichintroducesa
novelapproachformodelingaphotovoltaicpanelcomposedoftriple-junctioncells
designedfornanosatellite.
suggestedmodelreliesonasimplifiedsingle-diode(4-parameter)electricalcircuit,
withparametersdeterminedwhileconsideringtheinfluenceofenvironmental
factorssuchasirradianceandtemperatureunderAM0standardconditions
(T=28°C;G=1350W/m²).
Generallyitinvolvestheidentificationofanumberofparameterssuchas
theseriesresistance(R
s),theshuntresistance(R
sh),thesaturationcurrent
(I
s),theidealityfactor(n),andothers.
6

9. Governing Equations
7
Proposed Method For Parameters Extraction

10. Solar Cells to be Characterized
1.NanoPower P110-A solar panel equipped with
2 PV cells type 3G30A
2.TJSC used by A. Hadjdida Et Al.
3.TJSC used by Anaty, M Et Al.
4.CubeSat Thin Film Solar Cell Used by ASAL
8
Proposed Method For Parameters Extraction

11. Result and Validation of the
Method
The extracted parameters of each of the 04
Solar Cells
9
Parameters NanoPower P110-A
(GOMspace)
0.0269
3.0738
Parameters A. Hadjdida Et Al. Solar Cell
0.078645
2.768
Parameters Anaty, M et al
Solar Cell
0.019639
2.0337
Parameters ALSAT-1N TFSC
0.21576
2.1644

12. Solar Cells Characterization
12
Result and Validation of the Method
10

13. Conclusion & perspective
Theadoptedmethodhasdemonstrateadecentcapabilitytoextractequivalentcircuitunknown
parametersforcharacterizingthechosenaerospacesolarcellsforthestudy.Ultimately,the
conclusiondrawnisthattheproposedmethodcanbeappliedtodifferentaerospacesolarcells
withvaryingelectricalparameters,yieldingsatisfactoryresultsinproducingI-VandP-V
curves,hence,thesefindingshavethepotentialtoenhancethetechnologyandperformanceof
aerospacesolarcells.
Infutureworks,Someoftheinvestigationswillbecarryontheperformanceofthismethodon
theeffectofagingonaerospacesolarcellsespeciallywhenitisonboard.
Aftercheckingtheperformanceofthismethodonaging,someoptimizationwouldbetakenin
placetogetanaccurateresultsandunderstandcloselythebehaviourofthesolarcells
especiallywhenwedon’thavethemwithus.
Future Works
Conclusion
11

14. Thank you
for your attention
Khaled TEFFAH
Scientific and Technological
Watch Unit
Algerian Space Agency -ASAL
E-mail: [email protected]
Tel: [phone]