Real-Time Efficiency Boosting for PV Systems Using MPPT Based on Sliding Mode

This paper presents a photovoltaic system with maximum power point tracking (MPPT) facility. The goal of this work is to obtain maximum power from the photovoltaic generator (PVG) by using an MPPT. Therefore the sliding mode controller (SMC) is proposed as MPPT controller. This controller is based on the constant voltage algorithm. In order to meet different requirements of stability and rapidity in different weather condition, we construct a voltage estimator; the estimator output will be the input for the SMC. Simulation results prove that the SMC, under load disturbances, compared to the well-known perturbation and observation (P&O), offers fast and accurate converging to the maximum operating point (MPP). The implementation of the MPPT based SMC hardware setup is done using DSPACE real time control. Experimentation results are provided to demonstrate the validity of the proposed control scheme.