Case Study on the Dependency of the Degradation Rate on Degradation Modes and Methodology Using Monitoring Data
Denz J, Peters MI, Hauch J, Buerhop-Lutz C (2022)
Publication Type: Conference contribution
Publication year: 2022
Journal
Publisher: American Institute of Physics Inc.
Book Volume: 2487
Conference Proceedings Title: AIP Conference Proceedings
Event location: Hamelin, Virtual, DEU
ISBN: 9780735443624
DOI: 10.1063/5.0102549
Abstract
We present here a degradation study of a PV power plant consisting of several module pairs connecting each to a micro-inverter with monitoring. The modules comprise cell cracks, cell breakages and edge shunting. The impact of using different methodologies on the resulting relative yield loss rates is analyzed. It is demonstrated how these methods can be altered to circumvent missing irradiation sensor data generating a substitute for a relative degradation rate. The relative degradation rate of cell cracks is close to the reference with all methods and near to the detection limit which indicates little degradation for cell cracks beyond the material-inherent degradation. The modules with cell breakages and edge shunting show a higher relative yield loss of 1-3 %/a depending on the method of analysis. This indicates quite a variation is possible depending on the method thus warranting caution when evaluating degradation rates or their substitutes. It was shown that cell breakages perform increasingly worse in summer leading to even higher but seasonal performance losses. Because of that, the relative yield loss can be much higher than just the relative loss in rated power due to probably averse temperature effects on defect performance. To better assess cell crack degradation, either longer observation periods or more precise methods are needed.
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Germany (DE)How to cite
APA:
Denz, J., Peters, M.I., Hauch, J., & Buerhop-Lutz, C. (2022). Case Study on the Dependency of the Degradation Rate on Degradation Modes and Methodology Using Monitoring Data. In Rolf Brendel, Christophe Ballif, Sebastien Dubois, Stefan Glunz, Giso Hahn, Jef Poortmans, Pierre Verlinden, Arthur Weeber (Eds.), AIP Conference Proceedings. Hamelin, Virtual, DEU: American Institute of Physics Inc..
MLA:
Denz, Janine, et al. "Case Study on the Dependency of the Degradation Rate on Degradation Modes and Methodology Using Monitoring Data." Proceedings of the 11th International Conference on Crystalline Silicon Photovoltaics, SiliconPV 2021, Hamelin, Virtual, DEU Ed. Rolf Brendel, Christophe Ballif, Sebastien Dubois, Stefan Glunz, Giso Hahn, Jef Poortmans, Pierre Verlinden, Arthur Weeber, American Institute of Physics Inc., 2022.
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