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 Sept 201913 Sept 2019
    Conference number: 36
    https://europa.eu/newsroom/events/36th-european-photovoltaic-solar-energy-conference-and-exhibition-eu-pvsec-2019_en

    Conference

    Conference36th European Photovoltaic Solar Energy Conference and Exhibition
    Number36
    Country/TerritoryFrance
    CityMarseille
    Period09/09/201913/09/2019
    Internet address

    Keywords

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

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