Evaluation of two-diode-model of a solar panel in a wide range of environmental conditions |
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| Authors: | Mohsen Taherbaneh A H Rezaie H Ghafoorifard K Rahimi M B Menhaj J M Milimonfared |
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| Affiliation: | 1. Department of Electrical Engineering , Amirkabir University of Technology , Iran;2. Iranian Research Organization for Science and Technology , Iran taherbaneh@aut.ac.ir;4. Department of Electrical Engineering , Amirkabir University of Technology , Iran;5. Iranian Research Organization for Science and Technology , Iran |
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| Abstract: | In this article, a standard and comprehensive two-diode model of a solar cell is first fully described, and a solar panel model based on this model is developed. A measurement system is designed and implemented to evaluate the validity of the developed model. This measurement system is capable of extracting the electrical behaviour of solar panels in different environmental conditions. A comparison between measurement data and simulation results is performed to evaluate the model's accuracy. It is observed that the extracted electrical parameters have a good compatibility with the simulated data only near to nominal conditions. The main conclusion to be drawn is that the obtained model of a solar panel cannot fully describe its behaviour in a wide range of environmental conditions and consequently a modification is needed. Finally an appropriate method, using curve fitting, is introduced to modify the model. By adding several nonlinear terms to the equations of the solar panel model, the accuracy of the model is considerably boosted. |
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| Keywords: | two-diode model solar panels I-V curves environmental conditions model modification |
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