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Method for photovoltaic parameter extraction according to a modified double‐diode model
Author(s) -
Bühler Alexandre José,
Krenzinger Arno
Publication year - 2013
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.2170
Subject(s) - photovoltaic system , diode , extraction (chemistry) , equivalent series resistance , voltage , representation (politics) , variable (mathematics) , computer science , work (physics) , biological system , materials science , mathematics , optoelectronics , physics , engineering , mathematical analysis , chemistry , electrical engineering , thermodynamics , chromatography , politics , biology , political science , law
The variables presented in the current–voltage equation of a photovoltaic (PV) device are usually called PV parameters. There are several different methods for PV parameter extraction from measured data according to different models. However, many of these methods provide results that do not represent I–V curves of thin films devices correctly. This can occur because either the applied model or the PV parameter extraction methods are not suitable. It is also possible that the extracted parameters provide a good mathematical representation of the curves but without physical meaning (e.g. negative series resistance). This work presents a method for PV parameter extraction based on a modified double‐diode model. In this model, the ideality factor related to the recombination of the charge carriers in the space‐charge region is assumed as a variable. This method has been tested for different I–V curves of different PV module technologies providing very good results and parameters with physical meaning in all the cases. Copyright © 2012 John Wiley & Sons, Ltd.