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Download fileInterlaboratory comparison of short-circuit current versus irradiance linearity measurements of photovoltaic devices
journal contribution
posted on 2019-03-11, 11:38 authored by Martin BlissMartin Bliss, Tom BettsTom Betts, Ralph Gottschalg, Elena Salis, Harald Mullejans, Stefan Winter, Ingo Kroeger, Karsten Bothe, David Hinken, J. Hohl-EbingerThis work presents the results of the first interlaboratory comparison of linearity
measurements of short-circuit current versus irradiance that includes a wide variety of
photovoltaic (PV) device types, from reference cells to full-size modules. The aim of this
inter-comparison was to compare the methods employed and to collect new inputs useful for
the revision of the standard IEC 60904-10, which deals with linearity measurements for PV
devices. The procedures and facilities employed by the partners include the differential
spectral responsivity, the white light response, the solar simulator method and the two-lamp
method. The facilities are generically described and compared and their main sources of
uncertainty are discussed. Comparison results show good agreement within declared
uncertainties between all partners. A few minor exceptions under low-light conditions raise
questions of possible uncertainty underestimation for these specific conditions. The overall
outcome of the comparison also highlights the importance of considering correlations in the
uncertainty budget, which can potentially improve the overall stated uncertainty. A critical
review is made of the data analysis adopted in the standard IEC 60904-10 to calculate the
linearity degree of the short-circuit current towards irradiance. The analysis review suggests
a way to make results based on different methods more comparable and less prone to
erroneous linearity assessment.
Funding
The research work leading to this article was carried out within the EMRP ENG55 project Towards an Energy-based Parameter for Photovoltaic Classification. The EMRP is jointly funded by the EMRP participating countries within EURAMET and the European Union.
History
School
- Mechanical, Electrical and Manufacturing Engineering
Published in
Solar EnergyVolume
182Pages
256 - 263Citation
BLISS, M. ... et al., 2019. Interlaboratory comparison of short-circuit current versus irradiance linearity measurements of photovoltaic devices. Solar Energy, 182, pp. 256-263.Publisher
© International Solar Energy Society. Published by ElsevierVersion
- AM (Accepted Manuscript)
Publisher statement
This paper was accepted for publication in the journal Solar Energy and the definitive published version is available at https://doi.org/10.1016/j.solener.2019.02.031.Acceptance date
2019-02-14Publication date
2019-02-28ISSN
0038-092XPublisher version
Language
- en