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Full system universal upscaling method for semi-submersible floating offshore wind turbines

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  • Qiao, Yanhui
  • Fang, Jianju

Abstract

The upscaling method for floating offshore wind turbines is crucial for improving the design efficiency. However, existing methods typically only focus on semi-submersible floating platforms upscaling to support predefined offshore wind turbines, and are not suitable for universal upscaling of all subsystems. To address this problem, a full system universal upscaling method for semi-submersible floating offshore wind turbines is proposed. Firstly, a wind turbines upscaling method based on linear upscaling law and existing data trends is proposed to combine aerodynamic similarity and lightweight technology development. Then, the upscaling method for floating platforms and mooring & anchor systems is proposed based on the assumption of the constant maximum static pitch angle and total surge mooring stiffness respectively, which can meet buoyancy and stability requirements of floating foundation. Finally, a universal controller is developed with torque, blade pitch, and floating feedback control to accurately calculate the overall dynamic response. A full system upscaling and simulation framework is constructed by OpenFAST for method validation, and the IEA 15 MW model is upscaled to 20 MW. The results demonstrated that the 20 MW target models have good hydrodynamic characteristics and the overall dynamic response, which can provide important theoretical references for commercial model development.

Suggested Citation

  • Qiao, Yanhui & Fang, Jianju, 2025. "Full system universal upscaling method for semi-submersible floating offshore wind turbines," Renewable Energy, Elsevier, vol. 250(C).
    • Handle: RePEc:eee:renene:v:250:y:2025:i:c:s0960148125010080
    DOI: 10.1016/j.renene.2025.123346
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