A single-stage three-phase grid-connected photovoltaic system with fractional order MPPT

This paper propose a new maximum power point tracker called fractional order extremum seeking control for grid-connected photovoltaic (PV) systems tasks to better accommodate rapid varying solar irradiance for photovoltaic (PV) arrays. The new algorithm is benchmarked against the integer order extremum seeking control and incremental conductance algorithms. Our extensive simulation results show that the 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.