Abstract
This paper aims to identify the model parameters of a photovoltaic array installed in our experimental platform. Two methods used for parameters identification in order to characterize the photovoltaic array are compared. Based on the electrical equivalent circuit of the photovoltaic cell, the mathematical model is deduced. From the data-sheet values, given by the manufacturer, we were able to determine the parameters of this model. On the other hand, the second method was applied by using one of the least squares fitting approaches. The measurement of the outdoor solar irradiance, cell temperature and current taken by dSPACE controller board and for a constant terminal voltage level includes the necessary data to be fitted with the model. The implementation of two methods in MATLAB provides the model parameters which have to minimize as soon as possible the error involved between the calculated and measured output current. For the minimum obtained error, the corresponding method is the best one for the photovoltaic array characterization.
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