A predictive current control for solar PV fed VSI in distribution system

A control technique based on predictive current control for a voltage source inverter fed by a solar PV system integrating to the distribution grid with Perturb and Observe (P&O) maximum power point tracking (MPPT) technique is presented in this paper. The proposed control is implemented for a three phase system to support the utility grid by providing the power to grid as well as to the connected loads with improved quality of power. This control approach for solar PV fed voltage source inverter (VSI) provides fast transient response and improved accuracy in control. Proposed control algorithm efficiently and continuously tracks reference current to make grid current sinusoidal in steady state and transient conditions. When the solar irradiance is available, the developed system acts as power quality conditioner and supply the PV generated power to the loads and the grid. During unavailability of sun power the system transfer the power from the grid to the load and capable to provide multidirectional power flow. Simulation for the proposed system has been carried out and results are presented.