Fast Terminal Synergetic Control for Maximum Power Point Tracking of Stand-Alone Photovoltaic System

Based on the Fast Terminal Synergetic (FTS) approach, a powerful non-linear Maximum Power Point Tracking (MPPT) controller for standalone photovoltaic (PV) systems is developed and presented in this paper. The PV system mainly contains a PV array, a boost converter, an MPPT controller and a resistive load. The proposed MPPT controller contains two loops. The first one provides an estimation of the PV voltage reference (Vref) which is used as input of the second control loop to generate the FTSC signal (dFTSC) and so ensure the finite time convergence to the Maximum Power Point (MPP) for each value of solar irradiation and cell temperature. The obtained simulation results using Matlab/SimulinkMT toolbox have proven excellent performance. Good robustness and fast dynamic response under different atmospheric conditions are successfully achieved with high reduced oscillations around the MPP.