Method for Automatic Calculation of the Exposure Time in Electroluminescence Imaging of Photovoltaic Modules

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Abstract

Electroluminescence (EL) imaging of photovoltaic (PV) modules requires careful selection of the measurement parameters, such as camera sensor exposure time, for obtaining accurate images for qualitative and quantitative evaluation of PV module failures. In this work we propose a method for determining the optimal exposure time for EL imaging of PV panels, with respect to maximizing the utilized camera sensitivity range and limiting image saturation due to overexposure. The method requires two EL measurements of the PV panel, at two distinct exposure times, that are used to calculate the optimal exposure time. The main advantage of the proposed method over manually calibrating the exposure time of the camera is that it can be integrated in the camera image acquisition application, for automatic exposure time calibration.
Original languageEnglish
Title of host publicationProceedings of 36th European Photovoltaic Solar Energy Conference and Exhibition
PublisherEU PVSEC
Publication date2019
Pages860-65
DOIs
Publication statusPublished - 2019
Event36th European Photovoltaic Solar Energy Conference and Exhibition - Marseille, France
Duration: 9 Sep 201913 Sep 2019

Conference

Conference36th European Photovoltaic Solar Energy Conference and Exhibition
CountryFrance
CityMarseille
Period09/09/201913/09/2019

Keywords

  • Electroluminescence imaging
  • Exposure time
  • Photovoltaic modules,
  • Solar cells
  • Integration time
  • Shutter speed

Cite this

Spataru, S., Sera, D., Parikh, H., Benatto, G. A. D. R., Mantel, C., Poulsen, P. B., & Forchhammer, S. (2019). Method for Automatic Calculation of the Exposure Time in Electroluminescence Imaging of Photovoltaic Modules. In Proceedings of 36th European Photovoltaic Solar Energy Conference and Exhibition (pp. 860-65). EU PVSEC. https://doi.org/10.4229/EUPVSEC20192019-4CO.1.3