AN IMPROVED MAXIMUM POWER POINT TRACKING BASED ON FRACTIONAL ORDER EXTREMUM SEEKING CONTROL IN GRID-CONNECTED PHOTOVOLTAIC (PV) SYSTEMS

摘要

This paper presents a fractional order extremum seeking control scheme for grid-connected photovoltaic (PV) systems tasks to better accommodate rapid varying solar irradiance for photovoltaic (PV) arrays. The stability analysis of the proposed control algorithm is presented first. Then the new algorithm is benchmarked against the integer order extremum seeking control. Our extensive simulation and experimental results show that, our proposed maximum power point tracker has faster convergence speed in comparison to integer order and incremental conductance algorithm and also less total harmonic distortion (THD) in the injected current to the grid.