Fault Tolerant Control of DFIG-Based Wind Energy Conversion System Using Augmented Observer

Xu Wang and Yanxia Shen
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Xu Wang: Key Laboratory of Advanced Process Control for Light Industry, Jiangnan University, Wuxi 214122, China
Yanxia Shen: Key Laboratory of Advanced Process Control for Light Industry, Jiangnan University, Wuxi 214122, China

Energies, 2019, vol. 12, issue 4, 1-12

Abstract: An augmented sliding mode observer is proposed to solve the actuator fault of an uncertain wind energy conversion system (WECS), which can estimate the system state and reconstruct the actuator faults. Firstly, the mathematical model of the WECS is established, and the non-linear term in the state equation is separated as the uncertain part of the system. Then, the states of the system are augmented, and the actuator fault is considered as part of the augmented state. The augmented sliding mode observer is designed to estimate the system state and actuator fault. A robust fault-tolerant controller is designed to ensure the reliable input of the WECS, maintain the stability of the fault system and maximize the acquisition of wind energy. The numerical simulation results verify the effectiveness of the control strategy.

Keywords: wind energy conversion system; augmented sliding mode observer; fault reconstruction; fault-tolerant control (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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