Performance Improvement for PMSG Tidal Power Conversion System with Fuzzy Gain Supervisor Passivity-Based Current Control

The power captured by a tidal conversion system depends highly on the applied control strategies. In fact, nonlinear properties of the generator, parameter uncertainties, and external disturbances make the controller design a challenging problem. This paper contributes with the novel fuzzy gain supervisor passivity-based control (FGSPBC) method that allows the PBC to be faster, combined with a PI controller where its gains are adopted by the FGSPBC, applied to the PMSG based variable tidal turbine with grid connection via back-to-back converter to bring the PMSG to work at an optimal point while ensuring stability, fast convergence of the conversion system, and performance improvement. The aims of this work are that the regulation of the DC voltage and the reactive power at their respective values, whatever the disturbances related to the PMSG. Numerical investigation under MATLAB/Simulink addresses the effectiveness, stability, and fast convergence of the studied system.