Speed control of wind turbines in the stall region

Author

Ekelund, Thommy

Author_Institution

Control Eng. Lab., Chalmers Univ. of Technol., Goteborg, Sweden

fYear

1994

fDate

24-26 Aug 1994

Firstpage

227

Abstract

This paper investigates the minimal load variations that can be achieved using a linear quadratic (LQ) controller while maintaining rated power in a stalled variable speed fixed pitch wind turbine. Analytic results can be derived for a very simple second order model. The results are confirmed with numerical analysis of higher order models with state estimation based on generator speed measurement. The characteristics derived from linear models have been verified with simulation of non-linear models. The controller is stability robust to parameter changes and significantly better than a traditional PI-controller at high wind speeds

Keywords

linear quadratic control; robust control; state estimation; velocity control; wind turbines; generator speed measurement; higher order models; linear quadratic controller; minimal load variations that; nonlinear models; numerical analysis; rated power; robust; second order model; speed control; stall region; stalled variable speed fixed pitch wind turbine; state estimation; Linear-quadratic control; Robustness; State estimation; Turbines; Velocity control; Wind power generation;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Applications, 1994., Proceedings of the Third IEEE Conference on

Conference_Location

Glasgow

Print_ISBN

0-7803-1872-2

Type

conf

DOI

10.1109/CCA.1994.381194

Filename

381194