Synergetic Control for DC-Link Voltage Regulator of Three Phase Inverter Grid-Tied PV System

The context of energy in which this work is written is fairly broad, which is the renewable energy, in particular photovoltaic energy, where this connection to the grid is highly requested. Therefore, we introduce in this work a method for controlling the DC link voltage of PV systems connected to the grid: the fractional nonlinear synergetic controller. The primary goals of this controller are to improve transient response, improve the reference power injected to the inverter, and keep the grid-injected current's total harmonic distortion (THD) at a minimal level., even when there are variations in irradiance. To validate the efficacy of this controller, a comparative analysis is conducted using Matlab.Simulink, contrasting it with both the nonlinear synergetic and PI control strategies. The results of the simulations unequivocally show that the suggested fractional nonlinear synergetic controller outperforms the PI control.