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A Simplified Modeling Approach of Floating Offshore Wind Turbines for Dynamic Simulations

Author

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  • Javier López-Queija

    (TECNALIA, Basque Research and Technology Alliance (BRTA), Parque Tecnológico de Bizkaia Astondo Bidea, Edificio 700 E, 48160 Derio, Spain
    Mechanical Engineering Department, University of the Basque Country UPV/EHU, 48013 Bilbao, Spain)

  • Eider Robles

    (TECNALIA, Basque Research and Technology Alliance (BRTA), Parque Tecnológico de Bizkaia Astondo Bidea, Edificio 700 E, 48160 Derio, Spain
    Automatics and System Engineering Department, University of the Basque Country UPV/EHU, 48013 Bilbao, Spain)

  • Jose Ignacio Llorente

    (Mechanical Engineering Department, University of the Basque Country UPV/EHU, 48013 Bilbao, Spain)

  • Imanol Touzon

    (TECNALIA, Basque Research and Technology Alliance (BRTA), Parque Tecnológico de Bizkaia Astondo Bidea, Edificio 700 E, 48160 Derio, Spain)

  • Joseba López-Mendia

    (TECNALIA, Basque Research and Technology Alliance (BRTA), Parque Tecnológico de Bizkaia Astondo Bidea, Edificio 700 E, 48160 Derio, Spain)

Abstract

Currently, floating offshore wind is experiencing rapid development towards a commercial scale. However, the research to design new control strategies requires numerical models of low computational cost accounting for the most relevant dynamics. In this paper, a reduced linear time-domain model is presented and validated. The model represents the main floating offshore wind turbine dynamics with four planar degrees of freedom: surge, heave, pitch, first tower fore-aft deflection, and rotor speed to account for rotor dynamics. The model relies on multibody and modal theories to develop the equation of motion. Aerodynamic loads are calculated using the wind turbine power performance curves obtained in a preprocessing step. Hydrodynamic loads are precomputed using a panel code solver and the mooring forces are obtained using a look-up table for different system displacements. Without any adjustment, the model accurately predicts the system motions for coupled stochastic wind–wave conditions when it is compared against OpenFAST, with errors below 10% for all the considered load cases. The largest errors occur due to the transient effects during the simulation runtime. The model aims to be used in the early design stages as a dynamic simulation tool in time and frequency domains to validate preliminary designs. Moreover, it could also be used as a control design model due to its simplicity and low modeling order.

Suggested Citation

  • Javier López-Queija & Eider Robles & Jose Ignacio Llorente & Imanol Touzon & Joseba López-Mendia, 2022. "A Simplified Modeling Approach of Floating Offshore Wind Turbines for Dynamic Simulations," Energies, MDPI, vol. 15(6), pages 1-16, March.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:6:p:2228-:d:774296
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    References listed on IDEAS

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    1. Srikanth Bashetty & Selahattin Ozcelik, 2021. "Review on Dynamics of Offshore Floating Wind Turbine Platforms," Energies, MDPI, vol. 14(19), pages 1-30, September.
    2. Liu, Jinsong & Thomas, Edwin & Goyal, Anshul & Manuel, Lance, 2019. "Design loads for a large wind turbine supported by a semi-submersible floating platform," Renewable Energy, Elsevier, vol. 138(C), pages 923-936.
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    Cited by:

    1. Hedi Basbas & Yong-Chao Liu & Salah Laghrouche & Mickaël Hilairet & Franck Plestan, 2022. "Review on Floating Offshore Wind Turbine Models for Nonlinear Control Design," Energies, MDPI, vol. 15(15), pages 1-27, July.
    2. López-Queija, Javier & Sotomayor, Eneko & Jugo, Josu & Aristondo, Ander & Robles, Eider, 2024. "A novel python-based floating offshore wind turbine simulation framework," Renewable Energy, Elsevier, vol. 222(C).

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