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Uncertainty of Solar Simulator Spectral Irradiance Data and Problems with Spectral Match Classification
W. Herrmann, L. Rimmelspacher
Calibration, Spectral Response, Solar Simulator, PV Module
Components for PV Systems
Subtopic: PV Modules
Event: 27th European Photovoltaic Solar Energy Conference and Exhibition
Session: 4CO.11.1
3015 - 3021
ISBN: 3-936338-28-0
Paper DOI: 10.4229/27thEUPVSEC2012-4CO.11.1
0,00 EUR
Document(s): paper


Reliable information on the spectral irradiance data from a solar simulator used for the output power characterisation of PV modules is especially important for accurate spectral mismatch corrections in accordance with the standard IEC 60904-7. The quality of the spectral performance of artificial light sources is commonly characterised by the so-called spectral match as defined in the standard IEC 60904-9. This parameter describes the deviation from the AM1.5 reference spectral distribution in the wavelength range of 400 nm to 1100 nm. Depending on the experimental value for spectral match, performance classes A, B or C are attributed. This paper presents the results of an experimental study on the variation of spectral irradiance of xenon lamp solar simulators used in PV module production plants and in PV test laboratories. We demonstrate that the spectral distribution cannot be assumed to be a constant but rather depends on the operating conditions and the test environment. Periodic measurement of spectral irradiance distribution is therefore required in order to ensure accurate spectral mismatch corrections and to avoid systematic measurement errors in PV power measurement. Given our findings, we analyse the robustness of spectral class A solar simulators regarding spectral mismatch effects for various PV technologies and offer recommendations for improving the spectral match classification scheme in IEC 60904-9.