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PV-Catapult WP9 Performance Modelling. Ralph Gottschalg , Sheryl Williams, Wlodzimierz Kolodenny, Mariusz Prorok, Tadeusz Zdanowicz, Antoine Guerin de Montgareuil, Nico van der Borg, Teun Burgers, Hugo de Moor, Gabi Friesen, Dirk Stellbogen, Hans-Dieter Mohring. Outline.

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pv catapult wp9 performance modelling

PV-Catapult WP9 Performance Modelling

Ralph Gottschalg,Sheryl Williams, Wlodzimierz Kolodenny, Mariusz Prorok, Tadeusz Zdanowicz, Antoine Guerin de Montgareuil, Nico van der Borg, Teun Burgers, Hugo de Moor, Gabi Friesen, Dirk Stellbogen, Hans-Dieter Mohring

outline
Outline
  • Overview of Aims and Objectives
  • Approach
  • Review of modelling methodologies evaluated in the RR
  • Results of RR1
  • Results of RR2
  • Conclusions
aim of this wp
Aim of this WP
  • Plan and execute one modelling round robin (RR) test
  • Evaluate State of the Art of European Photovoltaic Module Modelling
  • Identify measurement accuracy of European measurement methodologies – limited to modules
  • Demonstrate that a 5% accuracy is possible

Performance also added:

  • Identify pitfalls for future RR
  • Make available knowledge and infrastructure to Performance
partners
Modelling Partners:

CEA

CREST

ECN

SUPSI

WrUT

Data and other input

FhG-ISE

JRC

TTU

TÜV

ZSW

Partners
timeline
Timeline
  • Start of work November 2004
  • Questionnaire of current methods sent out January 2005
  • First RR completed June 2005
    • Re-Modelling of same site/module/year (ideal case)
    • Modelling same module at same site, different year
  • Second RR completed January 2006
    • Predicting same site, different module
    • Predicting different module, different site
    • Predicting same module, different site
  • Dissemination/discussion meeting for future work January 2006
1 st round robin
1st Round Robin
  • How different are the different sites
  • How accurate are modelling approaches in ideal or close to ideal conditions
slide12

Lessons Learnt RR1

  • ORGANIZATIONAL
    • Dataset format
    • Database Structure
    • Data filter and handling
    • Not as conclusive as wanted because groups dropped out (budget cuts)
    • Late start but on time to complete all tasks
  • SCIENTIFIC
    • Temporal predict was successful, virtually all <6%
    • Different sites result in different accuracy
    • Surprisingly small problems for double junction
comparison of methodologies zsw dataset
Comparison of MethodologiesZSW Dataset

Base Modules

Predicted Modules

CIS_6

CdTe_17

CIS_16

CdTe_20

Same Loc.

CIS_17 & CIS_20

CdTe_1 & CdTe_4

Different Loc.

2nd round robin
2nd Round Robin
  • How much does the module variability influence energy calculations
  • How well can we cope with the variability in TF devices
  • Are there site specific differences between the different data sets
  • Test:
    • Same site different module
    • Same module different site
    • Different module, different site
comparison of methodologies pvcatapult meas rr dataset
Comparison of MethodologiesPVCatapult Meas. RR Dataset

Predicted Modules

Base Modules

Loc.1

SolarLab

CEA

Loc.2

ECN

CREST

Loc.3

lessons learnt
Lessons Learnt
  • Module to module production effect dominate
  • Modelling based on outdoor measurements needs careful cleaning
    • Overfiltering might result in statistically insignificant corrections which might introduce large errors
    • Not detecting/cleaning outliers will result in deviations also introducing large errors
  • Models work well for c-Si
  • Accuracy not as good as desirable for thin films
conclusions
Conclusions
  • Main impact is the module-to-module variation
  • Different environments are no problem if the module data is known accurately
  • Error analysis of the measurement campaign is ongoing
  • The work of WP9 provide a good foundation for further investigation of performance modelling
workshop
Workshop
  • 35 participants
  • Visitors from US & Japan
  • Presentation of results
  • Discussion of
    • Presentations in general
    • Further need for research
publications
Publications
  • EUPVSEC-20, Barcelona
    • Williams, S. R., et al. (2005): Evaluating the State of the Art of Photovoltaic Performance Modelling in Europe.
  • WCPEC-3
    • Zdanowicz, T. et al (2006): Photovoltaic Performance Measurements in Europe: PV-Catapult Round Robin Tests
  • EuroSun 2006
    • Strobel, M.B. et al (2006): Measurement Accuracy of Energy Yield of Photovoltaic Systems
publications 2
Publications 2
  • Dresden
    • Gottschalg et al (2006): Round Robin Comparison of European Outdoor Measurement Systems
    • Gottschalg et al (2006): Variability of Electrical Parameters Determined by Using Different Solar Simulation Systems for Different PV Module Technologies
    • Williams et al (2006): Variability of Electrical Parameters Determined by European Research Facilities for Different PV Module Technologies
other dissemination efforts
Other Dissemination Efforts
  • Expert participation in IEA-PVPS Task 2
  • Expert participation in IEA TC82-WG2
  • Expert participation in CENELEC TC82-WG1
  • WP 8/9 asks question, IP Performance will answer these