Optimization of a Standalone PV System with a New Proposed MPPT Method

To achieve better optimization of the productivity of a standalone photovoltaic solar system, we first need to characterize the climate of the area where the system will be implemented. Then we have to study the behavior of the chosen charge with respect to the characteristics of the electrical parameters delivered by the photovoltaic generator (PVG). This will allow us to choose the right DC/DC converter. The new proposed MPPT method is based on the prediction of the maximum power point (MPP) of the PVG from the measurement of irradiation and temperature. The relationship between the MPP and the measured irradiation and temperature are modeled via mathematical equations by numerical methods such as interpolations (digital arithmetic sequence). Four parameters are created to facilitate the system controllability through the voltages of the inputs and outputs of the DC/DC converter with the climatic parameters variation. To test and evaluate the performance of the proposed MPPT method, we will make comparisons with conventional methods, such as: Perturb and Observe (P&O), Incremental Conductance (INC) and Fractional Open Circuit Voltage (FOCV), under dynamic weather conditions.