Modern Control of a Standalone Solar Pumping System Based on Asynchronous Motor

An effective control scheme of a standalone water pumping system powered by a photovoltaic (PV) source is presented in this contribution. The proposed solution aims to achieve robust control of the two stages of the pumping system. Therefore, a cascaded controller is designed for maximum power point tracking (MPPT), in which a perturb and observe (P&O) algorithm provides the optimal PV voltage. Then, a sliding mode controller (SMC) based on PWM is designed to regulate the input PV voltage. Subsequently, a fuzzy logic controller is designed to generate the reference speed which regulates the DC-bus voltage. Finally, predictive torque control (PTC) is applied to drive the induction motor (IM). In order to confirm the effectiveness of the proposed control methods, a simulation has been done within a dynamic change of irradiance.