Improvingthe qualityof energy in grid connected photovoltaicsystems

This paper proposes the effective utilization of active power filter (APF) for interconnecting the PV modules to the grid using direct power control (DPC) method. Its main feature is the capability to compensate the reactive power and harmonic currents drawn by nonlinear loads and simultaneously inject the maximum power available from the PV array into the grid. The reference current containing PV maximum power and harmonic components is developed based on direct power control via an integral-proportional (IP) controller, exploiting optimal solar energy was extracted by an algorithm of maximization MPPT is the INC-COND. The whole system (single stage converter) presents increased efficiency when compared to the conventional system. Simulation results on MATLAB/Simulink of the proposed system have been done and the obtained results prove the effectiveness of using a shunt active power filter as the interfacing unit for grid integrated renewable energy system.