Design of L1 Adaptive Control for PMSG Wind Turbine System

Abstract

This paper focuses on the design of an L1 adaptive controller for variable speed wind turbines on a permanent magnet synchronous generator (PMSG) to maximize the wind power exploited in the presence of parameters uncertainties and wind speed turbulences. This control method based on the class of state feedback state for multiinput multi-output (MIMO) system can be applied to the current control and speed control of the system. The proposed controller successfully deals with the essential nonlinear problems of wind turbines and the effect of unknown parameters. Moreover, the L1 adaptive controller with fast adaptation is not only beneficial for both performance and robustness but also effective for the appearance of the time-delay state variables of wind turbine. Finally, with comparison to the indirect model reference adaptive control (MRAC), the performances of the system are verified by mean of several simulation results.