Design of a Novel Observer-Based SMC for WECS System Using PMSG to Obtain Maximum Energy

This paper studies and proposes a new sliding mode controller (SMC) for a wind energy conversion system (WECS) using a permanent magnet synchronous wind turbine generator (PMSG) to harvest maximum energy when the wind speed changes. In addition, the paper introduces a nonlinear disturbance observer (NDOB) to estimate the actual wind speed, to provide input to the proposed controller that the authors have studied. The control scheme proposed in this study not only considers the changes in the system parameters, but also considers the randomness of the wind speed changes. The effectiveness of the new SMC design and control scheme is demonstrated by simulation results on Matlab/Simulink software. These results are shown in the change of wind speed deformation, wind deformations that the turbine receives, turbulence assessment, the observer also estimated the non-snow parameters, the system also takes into account maximum power point tracking (MPPT), always consistent with the proposed control law. Moreover, the research results also show that the system works stably, the output is always close to the set value, the system works with high quality, thereby proving that the research results have been studied by the authors are suitable, bringing great benefits in the control process.