부산대학교 도서관

This paper presents some aspects of robust control structure of DFIG-based wind turbine: drivetrain control and doubly fed induction generator control. Models of horizontal axis wind turbines and the theoretical principles of robust control that provides high performances under model uncertainties is presented. For the drivetrain, a state-space model is used to determine the transfer functions. For the induction generator, a vector control structure with stator flux orientation has adopted. An H-infinity controller is proposed for the drivetrain presents and a fractional order proportional integral controller (FOPI) is proposed for control the generator currents. With these controllers, high performances is obtained compared to conventional proportional integral controllers (PI) in the presence of external disturbances, measurement noises and turbine parameter variations. This paper an H-infinity controller and fractional order controller design methods presents. Comparative results of simulations, realized in Matlab-Simulink, are presented and include the control of the drivetrain with H-infinity controller and PID controller and the vector control of DFIG with a FOPI controller and a conventional PI controller. [ABSTRACT FROM AUTHOR]