A Grid Connected PV System With Hysteresis Control Algorithm for High Efficiency Ripple Free Mppt

ABSTRACT This project presents a control methodology of three phase grid connected PV system and its control schemes for applications in distributed generation (DG) systems. The system uses a two stage energy conversion topology composed of a DC-DC boost converter and five level-three phase voltage source inverter (VSI). The DC-DC converter is used to extract maximum power from the PV array and boost its output voltage. A maximum power point tracking (MPPT) technique is proposed in which hysteresis algorithm is used, with direct control method in which duty cycle is adjusted to achieve the maximum power point (MPP). The VSI is use for exchange the maximum power extracted by DC-DC converter to AC power by giving the gate pulse from voltage source controller. Simulation results on MATLAB/Simulink software are carried out to confirm the system operation. The Efficiency of MPPT and DC link voltage on the entire PV system is increased.