Pitch Angle Control of Floating Offshore Wind Turbines by H^∞ Control

Abstract

In floating offshore wind turbines, the platform motions induced by wind and wave conditions should be reduced to mitigate fatigue load on wind turbine components and decrease cost efficiency. In this paper, a pitch angle control of floating offshore wind turbines using H^∞ control is investigated to reduce the platform motions. The performance of the H^∞ controller is examined through a nonlinear simulation using a high-fidelity aeroelastic simulator “FAST. ” The simulation results show that the H^∞ controller has a better performance compared with a widely-used gain scheduled PI controller.