Electrical Characteristics Improvement of Photovoltaic Modules Using Two-Diode Model and its Application under Mismatch Conditions

This paper presents a Matlab/Simulink-based PV module using a two-diode model that takes into consideration losses due to recombination, as a result, improves the accuracy of the electrical characteristics of the model compared to one-diode model. The electrical parameters such as ideality factor, series and parallel resistances are essential parameters that influence the PV module's performance. A fast and simple iterative matching algorithm does the estimation of these parameters. The validation of the obtained simulation results acquired by Matlab/Simulink are done by the available commercial PV module's experimental data, utilizing various PV technologies such as monocrystalline and multi-crystalline, supplied by the manufacturer. Hence, since the PV module output power is affluence by an important factor known as partial shading, it poses the need to evaluate the PV module performance under these conditions. More so, in order for losses due to partial shading to be lessen, bypass-diodes are typically used. Therefore, it is-rightly essential for maximum power point to be predicted under partial shading condition.