Improvements in world-wide intercomparison of PV module calibration
| Autor: | Carl R. Osterwald, Dean H. Levi, Hironori Ohshima, S. Rummel, Kengo Yamagoe, M. Field, F. Neuberger, K Kiefer, Elena Salis, Harald Müllejans, Diego Pavanello, U. Kräling, Masahiro Yoshita, Yoshihiro Hishikawa |
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| Přispěvatelé: | Publica |
| Rok vydání: | 2017 |
| Předmět: |
Value (computer science)
Photovoltaische Module und Kraftwerke 02 engineering and technology 01 natural sciences intercomparison photovoltaic 010309 optics 0103 physical sciences Statistics photovoltaisches Modul Calibration Electrical performance General Materials Science Crystalline silicon uncertainty Mathematics Renewable Energy Sustainability and the Environment Photovoltaic system Photovoltaische Kraftwerke calibration 021001 nanoscience & nanotechnology World wide Photovoltaik Outlier Measurement uncertainty System und Zuverlässigkeit 0210 nano-technology |
| Zdroj: | Solar Energy. 155:1451-1461 |
| ISSN: | 0038-092X |
| DOI: | 10.1016/j.solener.2017.07.081 |
| Popis: | The calibration of the electrical performance of seven photovoltaic (PV) modules was compared between four reference laboratories on three continents. The devices included two samples in standard and two in high-efficiency crystalline silicon technology, two CI(G)S and one CdTe module. The reference value for each PV module parameter was calculated from the average of the results of all four laboratories, weighted by the respective measurement uncertainties. All single results were then analysed with respect to this reference value using the En number approach. For the four modules in crystalline silicon technology, the results agreed in general within ±0.5%, with all values within ±1% and all En numbers well within [−1, 1], indicating further scope for reducing quoted measurement uncertainty. Regarding the three thin-film modules, deviations were on average roughly twice as large, i.e. in general from ±1% to ±2%. A number of inconsistent results were observable, although within the 5% that can be statistically expected on the basis of the En number approach. Most inconsistencies can be traced to the preconditioning procedure of one participant, although contribution of other factors cannot be ruled out. After removing these obvious inconsistent results, only two real outliers remained, representing less than 2% of the total number of measurands. The results presented show improved agreement for the calibration of PV modules with respect to previous international exercises. For thin-film PV modules, the preconditioning of the devices prior to calibration measurements is the most critical factor for obtaining consistent results, while the measurement processes seem consistent and repeatable. |
| Databáze: | OpenAIRE |
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