Fuzzy Super-Twisting Sliding Mode Applied to Dc-Bus Voltage Regulator

To perform the stability and the robustness of the dc-link voltage in the photovoltaic (PV) grid-connected system, Fuzzy super twisting sliding mode strategy is presented in this paper. The combinaison between the Nonlinear super twisting sliding mode and fuzzy logic enhance the robustness and optimize the system response. The tracking superiority of the proposed control is illustrated in dc-link bus voltage regulation with fast transient response and low oscillations and total Harmonic Distortion (THD) reducing in the current injected to the grid under any weather conditions. To show the superiority of the between the proposed controller(FSTC) comprehensive comparisons are done with traditional control techniques, including th conventional Proportional-Integral (PI), and Super-Twisting Sliding Mode Control (STC) using MATLAB/SIMULINK.