H∞ Fault Tolerant Control of WECS Based on the PWA Model

Energies

Yun-Tao Shi¹  Qi Kou²  De-Hui Sun²  Zheng-Xi Li²  Shu-Juan Qiao² 

[1] Key Lab of Field Bus and Automation of Beijing, North China University of Technology, Beijing 100144, China;

关键词: H_∞ fault tolerant control;    piecewise affine;    wind energy conversion system;    H_∞ robust control;   

DOI  :  10.3390/en7031750

来源: mdpi

【 摘 要 】

The main contribution of this paper is the development of H_∞ fault tolerant control for a wind energy conversion system (WECS) based on the stochastic piecewise affine (PWA) model. In this paper the normal and fault stochastic PWA models for WECS including multiple working points at different wind speeds are established. A reliable piecewise linear quadratic regulator state feedback is designed for the fault tolerant actuator and sensor. A sufficient condition for the existence of the passive fault tolerant controller is derived based on some linear matrix inequalities (LMIs). It is shown that the H_∞ fault tolerant controller of WECS can control the wind turbine exposed to multiple simultaneous sensor faults or actuator faults; that is, the reliability of wind turbines can be improved.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.