DaySy: Daylight luminescence analysis of photovoltaic systems at Intersolar
Stuttgart (ots) – Researchers at the Institute for Photovoltaics, University of Stuttgart, developed an innovative daylight luminescence imaging method for photovoltaic system testing. The new method detects defects in installed PV modules through luminescence imaging, fast and independent of solar irradiance. Solarzentrum Stuttgart integrates the newly developed luminescence method into the DaySy system together with camera manufacturer HighFinesse GmbH. DaySy live-presentation will be shown at the Intersolar Munich hall B6 booth 512 from 19-21. june 2013.
New PV modules are usually screened for defects with electroluminescence (EL) prior to delivery. During transportation first microcracks and broken cells may occur. Improper installation adds even more. These defects slowly diminish the power output of the PV system in the subsequent years. Replacing damaged modules therefore strongly increases the PV system output. Unfortunately it has been quite challenging to detect module damages: Thermal imaging only works if solar irradiance exceeds 700 W/m whereas EL imaging requires low light conditions at dawn or during the night.
The Daylight luminescence imaging System DaySy localizes damaged modules independent of solar irradiance at any time of the day without the need for dismounting the modules from the PV system. Moreover, DaySy classifies defects unambiguously through a combination of electro- and photoluminescence. Short measurement times of approx. 30 sec per image enable fast detection of most common defects in PV systems: broken cell interconnections, (micro-) cracks, inactive cell areas, poor low light response, as well as potential induced degradation (PID).
Experience a live presentation of the daylight luminescence system DaySy on a remotely controlled quadrocopter RPAS ANTEOS from Aermatica S.p.A. at the Intersolar Munich in hall B6 booth 512.
Contact:
Solarzentrum Stuttgart - working partnership between Institute for Photovoltaics, University of Stuttgart and Steinbeiscenter Photovoltaics phone +49 (0) 711 31589 433 info@solarzentrum-stuttgart.com
Source article:
DaySy: Daylight luminescence analysis of photovoltaic systems at Intersolar

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