International Journal of applied mathematics and computer science

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Paper details

Number 1 - March 2018
Volume 28 - 2018

Active fault tolerance control of a wind turbine system using an unknown input observer with an actuator fault

Shanzhi Li, Haoping Wang, Abdel Aitouche, Yang Tian, Nicolai Christov

Abstract
This paper proposes a fault tolerant control scheme based on an unknown input observer for a wind turbine system subject to an actuator fault and disturbance. Firstly, an unknown input observer for state estimation and fault detection using a linear parameter varying model is developed. By solving linear matrix inequalities (LMIs) and linear matrix equalities (LMEs), the gains of the unknown input observer are obtained. The convergence of the unknown input observer is also analysed with Lyapunov theory. Secondly, using fault estimation, an active fault tolerant controller is applied to a wind turbine system. Finally, a simulation of a wind turbine benchmark with an actuator fault is tested for the proposed method. The simulation results indicate that the proposed FTC scheme is efficient.

Keywords
wind turbine system, linear parameter varying system, fault tolerant control, unknown input observer

DOI
10.2478/amcs-2018-0005