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Indoor measurement of photovoltaic device characteristics at varying irradiance, temperature and spectrum for energy rating

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journal contribution
posted on 10.06.2015, 13:31 by Martin BlissMartin Bliss, Tom BettsTom Betts, Ralph Gottschalg
The first three-dimensional performance matrix for use in photovoltaic (PV) energy rating is reported utilizing a novel energy rating solar simulator based on LEDs. Device characteristics are measured indoors at varying irradiance (G), temperature (T) and spectrum (E). This opens the possibility for a more accurate measurement system for energy yield prediction of PV devices, especially for devices with high spectral dependence such as wide bandgap solar cells as they take into account spectral changes in the light. The main aspects of the LED-based solar simulator used are briefly described. A measurement method is developed and detailed in the paper, which takes into account the current imperfections in the achievable spectrum. Measurement results for a crystalline silicon solar cell are used to demonstrate the measurement approach. An uncertainty analysis of the measurement system is given, resulting in an overall absolute uncertainty of 4.3% (coverage factor k = 2) in maximum power measurements at 765 W m−2 irradiance with scope for further improvements.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Research Unit

  • Centre for Renewable Energy Systems Technology (CREST)

Published in

MEASUREMENT SCIENCE & TECHNOLOGY

Volume

21

Issue

11

Pages

? - ? (11)

Citation

BLISS, M. BETTS, T.R. and GOTTSCHALG, R., 2010. Indoor measurement of photovoltaic device characteristics at varying irradiance, temperature and spectrum for energy rating. Measurement Science & Technology, 21 (11), article 115701

Publisher

© IOP Publishing Ltd

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2010

Notes

This was accepted for publication in the journal Measurement Science and Technology. The definitive published version can be found at: http://dx.doi.org/10.1088/0957-0233/21/11/115701

ISSN

0957-0233

eISSN

1361-6501

Language

en