Analysis of Performance Parameters of Amorphous Photovoltaic Modules under Different Environmental Conditions

A.A. Ghoneim, K.M. Kandil, A.Y. Al-Hasan, M. S. Altouq, A.M. Al-asaad, L. M. Alshamari, A. A. Shamsaldein

Abstract


The effects of temperature and radiation intensity on the performance parameters of amorphous hydrogenated silicon (a-Si:H) photovoltaic module have been investigated. An outdoor experimental setup is installed to carryout a series of I-V curve measurements under different irradiance and temperature conditions for the module. A numerical model which considers the effect of series and shunt resistances is developed to evaluate the different parameters of PV modules. Orthogonal distance regression (ODR) algorithm is adapted for fitting I-V measurements and extracting module parameters from I-V measurements. The values of module parameters, series resistance Rs, shunt resistance Rsh, diode ideality factor n and reverse saturation current Io determined from I-V measurements at different irradiation intensity and temperature range are in good agreement with the corresponding parameters obtained from the developed numerical model. The module parameters extracted from I-V measurements are employed to calculate the module performance parameters, i.e. open circuit voltage Voc, fill factor FF and module efficiency h at different irradiation intensity and temperature range. Present results indicate that the module parameters have a significant effect on module performance. Also, the behavior of Voc is completely different at higher temperatures.

Key words: Amorphous module parameters;  Ideality factor; Series resistance; Shunt resistance


Keywords


Amorphous module parameters; Ideality factor; Series resistance; Shunt resistance

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References


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DOI: http://dx.doi.org/10.3968/j.est.1923847920110201.715

DOI (PDF): http://dx.doi.org/10.3968/pdf

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