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Effect of mooring system stiffness on floating offshore wind turbine loads in a passively self-adjusting floating wind farm

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  • Mahfouz, Mohammad Youssef
  • Cheng, Po Wen

Abstract

Floating offshore wind turbines (FOWTs) offer a way to reduce wake losses in floating wind farms (FWFs) by using less stiff mooring systems (MS) that allow for self-adjusting layouts. These layouts enable turbines to reposition based on wind speed and direction, improving energy production. This study analyzes three self-adjusting FWF layouts with different MS stiffness and compares the resulting FOWT loads to a baseline FWF with a standard MS design. Our results show that reduced MS stiffness increases loads, especially at the tower base, and yaw stiffness must be maintained above a certain threshold. This is especially important in above-rated wind speeds, where increased aerodynamic yaw moments occur. A self-adjusting layout that adheres to yaw stiffness constraints showed a 1.5% increase in annual energy production (AEP) and a 4% reduction in MS costs using dynamic wake models.

Suggested Citation

  • Mahfouz, Mohammad Youssef & Cheng, Po Wen, 2025. "Effect of mooring system stiffness on floating offshore wind turbine loads in a passively self-adjusting floating wind farm," Renewable Energy, Elsevier, vol. 238(C).
    • Handle: RePEc:eee:renene:v:238:y:2025:i:c:s0960148124018913
    DOI: 10.1016/j.renene.2024.121823
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    References listed on IDEAS

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