THE USE OF FAST SPECTRORADIOMETERS FOR PULSED SOLAR SIMULATOR SPECTRA MEASUREMENTS

In this paper a calibration procedure and good laboratory practice on the use of a commercial fast spectroradiometer for the measurements of the emission spectrum of a pulsed solar simulator is presented. Quantitative assessment of spectroradiometer calibration and spectra measurement uncertainties, together with their influence on the calculation of photovoltaic (PV) modules performance are also presented. A commercial fast spectroradiometer was used for solar simulator spectra measurements. The first part of the experimental work consisted in the instrument calibration by means of a FEL type standard lamp. The spectroradiometer was then used for emission spectrum measurements of a class A simulator (according to IEC60904-9, Ed 2.0 (2007) standard) by Spectrolab, with 1.5ms flash duration. A sensitivity analysis was performed, varying spectroradiometer delay time (since flash start), integration time and angular tilt. The behaviour of fast spectroradiometer was also investigated, in particular focusing at NIR wavelength region (800 1100 nm). Finally, the measured spectral irradiance distribution of the flasher was used for spectral mismatch correction factor calculations, according to IEC60904-7, Ed 3.0 (2008). The I-V curves used for these calculations were derived from indoor measurements on polycrystalline silicon and thin film CIGS photovoltaic modules at STC conditions (1000W/m2, AM 1.5 and 25°C). Calibration tests showed how much spectroradiometers can be influenced by a non optimal orientation toward the lamp source: a dedicated mechanical set-up for the device is therefore needed, for a reproducible angular tilt. Spectra measurements on the pulsed solar simulator show a good reproducibility. Furthermore, data analysis on polycrystalline silicon module IV curves at STC suggests that emission spectrum of pulsed simulator can significantly influence the calculation of module electrical parameters. On the basis of all these results, a calibration routine of pulsed solar simulators emission is proposed by implementing periodical spectrum check using fast spectroradiometers.

POLVERINI Davide;  GALLEANO Roberto; 

2013-03-26

IEEE Conference publication

JRC63830

978-1-4244-9965-6,   

http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=6185926&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D6185926,    https://publications.jrc.ec.europa.eu/repository/handle/JRC63830,   

10.1109/PVSC.2011.6185926,