H ? Based Control for Load Mitigation in Wind Turbines

Asier Diaz De Corcuera, Aron Pujana-Arrese, Jose M. Ezquerra, Edurne Segurola and Joseba Landaluze
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Asier Diaz De Corcuera: IKERLAN-IK4, Arizmendiarreta, 2, E-20500 Arrasate-Mondragon, The Basque Country, Spain
Aron Pujana-Arrese: IKERLAN-IK4, Arizmendiarreta, 2, E-20500 Arrasate-Mondragon, The Basque Country, Spain
Jose M. Ezquerra: IKERLAN-IK4, Arizmendiarreta, 2, E-20500 Arrasate-Mondragon, The Basque Country, Spain
Edurne Segurola: IKERLAN-IK4, Arizmendiarreta, 2, E-20500 Arrasate-Mondragon, The Basque Country, Spain
Joseba Landaluze: IKERLAN-IK4, Arizmendiarreta, 2, E-20500 Arrasate-Mondragon, The Basque Country, Spain

Energies, 2012, vol. 5, issue 4, 1-30

Abstract: This article demonstrates a strategy to design multivariable and multi-objective controllers based on the H ? norm reduction applied to a wind turbine. The wind turbine model has been developed in the GH Bladed software and it is based on a 5 MW wind turbine defined in the Upwind European project. The designed control strategy works in the above rated power production zone and performs generator speed control and load reduction on the drive train and tower. In order to do this, two robust H ? MISO (Multi-Input Single-Output) controllers have been developed. These controllers generate collective pitch angle and generator torque set-point values to achieve the imposed control objectives. Linear models obtained in GH Bladed 4.0 are used, but the control design methodology can be used with linear models obtained from any other modelling package. Controllers are designed by setting out a mixed sensitivity problem, where some notch filters are also included in the controller dynamics. The obtained H ? controllers have been validated in GH Bladed and an exhaustive analysis has been carried out to calculate fatigue load reduction on wind turbine components, as well as to analyze load mitigation in some extreme cases. The analysis compares the proposed control strategy based on H ? controllers to a baseline control strategy designed using the classical control methods implemented on the present wind turbines.

Keywords: wind turbine; robust control; multivariable; H ? control; load mitigation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2012
References: View complete reference list from CitEc
Citations: View citations in EconPapers (10)

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