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Lyapunov-Based Framework for Platform Motion Control of Floating Offshore Wind Turbines

Author

Listed:
  • Mandar Phadnis

    (College of Engineering and Applied Science, University of Colorado Boulder, Boulder, CO 80309, USA)

  • Lucy Pao

    (College of Engineering and Applied Science, University of Colorado Boulder, Boulder, CO 80309, USA
    Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, CO 80309, USA)

Abstract

Floating offshore wind turbines (FOWTs) unlock superior wind resources and reduce operational barriers. The dynamics of FOWT platforms present added engineering challenges and opportunities. While the motion of the floating platform due to wind and wave disturbances can worsen power quality and increase structural loading, certain movements of the floating platform can be exploited to improve power capture. Consequently, active FOWT platform control methods using conventional and innovative actuation systems are under investigation. This paper develops a novel framework to design nonlinear control laws for six degrees-of-freedom platform motion. The framework uses simplified rigid-body analytical models of the FOWT. Lyapunov’s direct method is used to develop actuator-agnostic unconstrained control laws for platform translational and rotational control. A model based on the NREL-5MW reference turbine on the OC3-Hywind spar-buoy platform is utilized to test the control framework for an ideal actuation scenario. Possible applications using traditional and novel turbine actuators and future research directions are presented.

Suggested Citation

  • Mandar Phadnis & Lucy Pao, 2025. "Lyapunov-Based Framework for Platform Motion Control of Floating Offshore Wind Turbines," Energies, MDPI, vol. 18(15), pages 1-21, July.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:15:p:3969-:d:1709487
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    References listed on IDEAS

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    1. Grant, Elenya & Johnson, Kathryn & Damiani, Rick & Phadnis, Mandar & Pao, Lucy, 2023. "Buoyancy can ballast control for increased power generation of a floating offshore wind turbine with a light-weight semi-submersible platform," Applied Energy, Elsevier, vol. 330(PB).
    2. Antonio Galán-Lavado & Matilde Santos, 2021. "Analysis of the Effects of the Location of Passive Control Devices on the Platform of a Floating Wind Turbine," Energies, MDPI, vol. 14(10), pages 1-19, May.
    3. Sun, Xiaojing & Huang, Diangui & Wu, Guoqing, 2012. "The current state of offshore wind energy technology development," Energy, Elsevier, vol. 41(1), pages 298-312.
    4. Han, Chenlu & Nagamune, Ryozo, 2020. "Platform position control of floating wind turbines using aerodynamic force," Renewable Energy, Elsevier, vol. 151(C), pages 896-907.
    5. Lozon, Ericka & Hall, Matthew, 2023. "Coupled loads analysis of a novel shared-mooring floating wind farm," Applied Energy, Elsevier, vol. 332(C).
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