Multivariable control strategy for variable speed, variable pitch wind turbines |
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Authors: | B Boukhezzar L Lupu H Siguerdidjane M Hand |
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Affiliation: | 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 |
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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 by combining a nonlinear dynamic state feedback torque control strategy with a linear control strategy for blade pitch angle. A comparison 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. |
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Keywords: | Wind energy Variable speed wind turbine Power regulation Multivariable control |
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