A new recursive method based on datasheet information to calculate the double diode model parameters of commercially available photovoltaic modules

Abstract

In this study, a new method is introduced to compute the double-diode model parameters of commercially available photovoltaic modules. The new method has been based solely on datasheet-supplied electrical data. The new method offers two novelties. First, the dark reverse saturation currents are calculated analytically. Second, the parameters of the double-diode model are calculated by a new recursive procedure using tuning parameters. The validity of the new method is tested for twenty commercially photovoltaic modules with different technologies via the normalized root mean square error tool by comparing the datasheet current-voltage curves with simulated curves. In addition, the proposed method is compared with other methods at different operating conditions and also tested in the field under actual operating conditions using the root mean square error tool. It was founded that the new method calculates the parameters of the double diode model and simulates the current-voltage curves of commercially photovoltaic modules under various operating conditions with a high accuracy. Moreover, the new method is also very competitive with the selected methods and even achieves better simulation accuracy with a very low error level. The obtained results show that the new method is highly accurate, practical, and simple for all photovoltaic users.