风力发电机叶片设计及启动分析（英文版）19.pdf

文档介绍：ARTICLE IN PRESS
Renewable Energy 32 (2007) 1273–1287
ate/renene
Multivariable control strategy for variable speed,
variable pitch wind turbines
B. Boukhezzara,Ã, L. Lupua, H. Siguerdidjanea, M. Handb
aAutomatic Control Department, Supelec, Plateau du Moulon, 3, rue Joliot-Curie,
91192 Gif-sur-Yvette cedex, France
bNational Wind Technology Center, National Renewable Energy Laboratory, 1617 Cole Blvd./MS3811,
Golden, CO 80401, USA
Received 30 April 2006; accepted 12 June 2006
Available online 16 November 2006
Abstract
Reliable and powerful control strategies are needed for wind energy conversion systems to achieve
maximum performance. A new control strategy for a variable speed, variable pitch wind turbine is
proposed in this paper for the above-rated power operating condition. This multivariable control
strategy is realized bining a nonlinear dynamic state feedback torque control strategy with a
linear control strategy for blade pitch angle. parison with existing strategies, PID and LQG
controllers, is performed. The proposed approach results in better power regulation. The new control
strategy has been validated using an aeroelastic wind turbine simulator developed by NREL for a
high turbulence wind condition.
r 2006 Published by Elsevier Ltd.
Keywords: Wind energy; Variable speed wind turbine; Power regulation; Multivariable control
1. Introduction
Since the early 1990s wind power has enjoyed a renewed interest, particularly in the
European Union where the annual growth rate is about 20%. This growth is attributed to
wind power’s inherent attribute of generating carbon-emission-free electricity. In order to
sustain such growth, wind turbine performance must continue to be improved.
ÃCorresponding author. Tel.:[phone]; fax: [phone].
E-mail addresses: boubekeur.******@ (B. Boukhezzar),
houria.******@ (H. Siguerdidjane).
0960-1481/$ - see front matter r 2006 Publis