Title: Intercomparison of Pulsed Solar Simulator Measurements between the Mobile Flasher Bus and Stationary Calibration Laboratories
Citation: Proceedings of the 26th European Photovoltaic Solar Energy Conference, ISBN: 3-936338-27-2 p. 3374-3377
Publisher: WIP Wirtschaft und Infrastruktur GmbH & Co Planungs KG
Publication Year: 2011
JRC N°: JRC63383
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC63383
DOI: 10.4229/26thEUPVSEC2011-4AV.1.27
Type: Articles in periodicals and books
Abstract: Purpose of the Work Since 2009 a mobile pulsed solar simulator SMFB [1] is used to measure the nominal power of PV modules not only in a stationary laboratory but direct in the field. For example up to hundred PV modules a day, are measured direct on the site of a large scale PV power plants, to reduce logistics and wasted time to give the investor the feedback about an independent measure of the real nominal power of the PV arrays. It is obvious that the measurement uncertainty of the mobile flasher of +/-3% is larger than the stationary application even if one of the high quality commercial flashers is used. The purpose of this paper is to analyse the comparison of flasher measurements performed on the identical commercial modules at the stationary calibration labs, EU JRC, ESTI and a few minutes later on the mobile flasher bus, set up right on the next door of the stationary lab. Experimental Method On the site of the EU JRC in Ispra the mobile flasher SMFB was set up within a large laboratory building close to the entrance but outside the temperature controlled dark room of the ESTI laboratory where the ESTI flashers are located. The SMFB equipped with a Pasan 3c flasher applied a 10ms irradiance pulse [1], while the ESTI flasher, Spectrolab LAPSS [2] uses a 1.2ms flasher pulse. Both measurement units apply spectral response measurements to calculate the spectral mismatch correction [3] to minimize the measurement uncertainty of the nominal STC power. Three commercial standard modules were tested, polycrystalline silicon (SM210 Sunways), CdTe (FS275 First Solar) and CIS (Power Max 110, Avancis).The measurement process of each of the modules used, started with power measurement at ESTI (at 25°C) than mount the modules again on the SMFB (module temperature 17 to 21°C), again measured at ESTI for the second time and than finally performing the second power measurement on the SMFB. Results The measured nominal power values of the polycrystalline Silicon module measured at ESTI, SMFB and before at ISE are within a range of +/- 0.2%, well within the measurement uncertainty interval of larger 2.0% (k=2). In the final paper also the measured spectral response characteristics at ESTI, the SMFB and at Fraunhofer ISE will be compared, together with the low irradiance measurement of the SM210 module at JRC and SMFB. Outlook Thus a round robin test, including a higher number of test labs, is possible by transferring the PV modules together with a reference instrument, the mobile flasher bus. One of the benefits of such an approach is to minimize the effects on the measurement uncertainties due to not stable thin film module technologies highly depended on several pre-conditioning effects of light/dark and temperature cycles.
JRC Directorate:Nuclear Safety and Security

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