An Experimental Study on the Modeling of the PV Output

Accurate calculation of the power outputs of the modules under different solar radiation conditions is an important task to decide if it is feasible to construct a PV plant at the region or not. There are a lot of models that explore more accurate calculation using solar radiation values and the parameters of PV module. Unlike those models, a data based model is proposed in this paper. Before construction of the model, first an experimental setup is built and experiments are performed. During the experiments a pyranometer is positioned on the same angle with a PV module and both the solar radiations fall on the surface of the module and the power output of the module is measured and recorded. Secondly, the data is modeled using regression analysis. Consequently, the regression coefficients are calculated and the performance of the regression on modeling the PV output is examined. To measure the accuracy of the model, correlation of determination parameter and root mean square metric are calculated. It is argued that, it is possible to calculate the power output of the PV module in a good accuracy, in case PV output of the module is measured in a short period of time and the proposed approach is applied.