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Light‐ and elevated temperature‐induced degradation impact on bifacial modules using accelerated aging tests, electroluminescence, and photovoltaic plant modeling
Author(s) -
Dupuis Julien,
Plessis Gilles,
El Hajje Gilbert,
LajoieMazenc Eric,
Sandré Eric,
Radouane Khalid,
Dupeyrat Patrick
Publication year - 2021
Publication title -
progress in photovoltaics: research and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.286
H-Index - 131
eISSN - 1099-159X
pISSN - 1062-7995
DOI - 10.1002/pip.3345
Subject(s) - photovoltaic system , degradation (telecommunications) , materials science , environmental science , arrhenius equation , electroluminescence , sensitivity (control systems) , power (physics) , yield (engineering) , optoelectronics , activation energy , computer science , electronic engineering , electrical engineering , composite material , thermodynamics , chemistry , telecommunications , engineering , physics , organic chemistry , layer (electronics)
The authors report on the light‐ and elevated temperature‐induced degradation (LeTID) effect observed on bifacial photovoltaic modules and its potential impact on photovoltaic plants performance. Indoor LeTID quantification using indoor carrier‐induced degradation (CID) is carried out using current injection. Power measurements yielded higher LeTID sensitivity for the rear side of bifacial modules compared to the front side, hence leading to a variation of the bifaciality factor by several percentage points. The difficulty in evaluating the maximal power degradation caused by LeTID is also highlighted as a reduced number of samples are used most of the time and as cells within a single module do not have always the same performance evolution trends. Using indoor CID results with the help of empirical fitting and Arrhenius relation, the yield impact of LeTID on a bifacial power plant is simulated under three different climates. Modeling results help to identify the main parameters related to LeTID modules sensitivity that impact photovoltaic (PV) plants yield: maximal power degradation, stabilized power value after regeneration, activation energy value, and LeTID kinetics. In some cases, the yield variation caused by LeTID sensitive modules could be mitigated by carefully selecting the modules as a function of climatic conditions.