Hierarchical Robust Adaptive Control for Wind Turbines With Actuator Fault

Abstract This article solves the problem of regulating rotor speed tracking error for wind turbines in full-load region by an effective robust adaptive control strategy. The developed controller compensates uncertainty input effectiveness caused a pitch actuator fault, unmeasurable disturbance, and nonlinearity model. Wind have multilayer structures such that high-level structure is nonlinearly coupled through aggregation low-level authorities. Hence, design divided into two stages. First, L2 designed to attenuate influence disturbance fluctuations on speed. Then, layer, using proposed adaptation mechanism compensate faults. theoretical results show closed-loop equilibrium point regulated dynamics high level finite-gain stable, low globally asymptotically stable. Simulation significantly reduces root mean square compared some well-known works, despite largely fluctuating time-varying effectiveness.