Fractional nonlinear synergetic control for DC-link voltage regulator of three phase inverter grid-tied PV system

The paper proposes a Fractional Nonlinear Synergetic Controller for three phase grid Photovoltaic (PV) system to regulate the dc-link capacitor voltage and ensure fast transient response, low dc link voltage fluctuation and low Total Harmonic Distortion (THD) in the current injected to the grid even under irradiance change. A comparison between the proposed controller with Nonlinear Synergetic and Sliding Mode control (SMC) using MATLAB/SIMULINK has been done to validate the proposed controller. The simulation results show the advantage of the proposed one over the other available controllers.