The problem of negative damping undermines the aeroservoelastic stability of floating offshore wind turbines. The negative damping problem is most prevalent around rated wind speed, where the sensitivity of thrust to wind speed is the largest. This paper investigates the implementation of peak shaving, a controller feature that limits the rated thrust by pitching the blades before rated wind speed is reached. Two controller designs are investigated: a de-tuned controller and a nacelle-feedback controller. A time-domain metric is defined, inspired by Lyapunov theory, in order to compute and assess the stability of floating offshore wind turbines. The model of the International Energy Agency 15-MW reference wind turbine mounted on the University of Maine VolturnUS-S floater is simulated in HAWC2 with the National Renewable Energy Laboratory reference open-source controller. Peak shaving is applied to the two controller designs and stability is assessed. According to the chosen metric, peak shaving does not improve the stability of the system. This is due to the trade-off between loads and error tracking: although the loads and displacements in the fore-aft direction of the turbine are reduced, the rotor-speed tracking is poorer, which increases the shaft torsion fatigue load.


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    Titel :

    Aeroservoelastic stability of a floating wind turbine


    Beteiligte:
    Vanelli, T. (Autor:in) / Rinker, J. (Autor:in) / Zalkind, D. S. (Autor:in)

    Erscheinungsdatum :

    2022-01-01


    Anmerkungen:

    Vanelli , T , Rinker , J & Zalkind , D S 2022 , Aeroservoelastic stability of a floating wind turbine . in Floating Wind; Systems Design and Multi-Fidelity/Multi-Disciplinary Modelling; Future Wind; Smaller Wind Turbines . , 042001 , IOP Publishing , Journal of Physics: Conference Series , no. 4 , vol. 2265 , The Science of Making Torque from Wind 2022 , Delft , Netherlands , 01/06/2022 . https://doi.org/10.1088/1742-6596/2265/4/042001



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Klassifikation :

    DDC:    629



    AEROSERVOELASTIC STABILITY OF GUIDED MISSILES

    Haddadpour, H. / International Council of the Aeronautical Sciences | British Library Conference Proceedings | 2004