Wind Turbines Pitch Controller using Constrained Fuzzy-Receding Horizon Control

Abstract

This study concentrates on the variable speed/pitch wind-turbines control for the overrated wind-speed. The pitch control is essential in this high wind-speed to adjust the rated output power. The key challenges of designing a pitch control for the wind-turbine are the constraints in the pitch-angle, wind turbine nonlinearities, the wind-speed variations, and the unmeasured states (unstructured model dynamics). From this point of view, this paper proposes constrained fuzzy-receding horizon pitch control to investigate the variable speed wind turbine performance. The proposed controller guarantees the nominal stability and converted to a simple online quadratic optimization problem which required less computational time to be solved. The proposed controller is compared with the gain scheduled-PI controller (which has been used abundantly in the wind-turbine industry) by applying the wind-turbine mathematical model. Additionally, a typical 5MW offshore wind-turbine simulator is employed to verify the results from the mathematical model. The results indicate the effectiveness of the proposed controller over the baseline controller.