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| Hauptseite > Workflowsammlungen > Publikationsgebühren > Aerial photoluminescence imaging of photovoltaic modules |
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| Journal Article | FZJ-2023-02019 |
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2023
Wiley-VCH
Weinheim
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Please use a persistent id in citations: doi:10.1002/pssr.202300059 doi:10.34734/FZJ-2023-02019
Abstract: On-site imaging of modules in photovoltaic systems requires contact-free techniques with high-throughput and low-cost for commercial relevance. Photoluminescence imaging satisfies these requirements, but it has so far not been used for aerial imaging. Such a system faces unique engineering and operating challenges, including the need to mount a light source on the drone and identifying module defects from images taken under low- and non-uniform irradiance. In this study, we present our in-house developed PLAI (photoluminescence aerial imaging) setup and we demonstrate that it can be used to identify defects even with a difference of excitation intensity of up to 50%. The setup consists of a hexa-copter aerial drone equipped with an illumination unit and a near-infrared camera. The unit is capable of partially illuminating full size modules at night and capturing the photoluminescence response. In the maiden flight, we achieved a throughput of 13.6 PV modules per minute, and we estimate that a throughput of 300 PV modules per minute is feasible. We show that the setup can be used to detect and identify cracks and potential-induced-degradation with high levels of confidence. We verify these findings by cross correlation and comparing captured photoluminescence images to electroluminescence images taken indoors.
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