Coupled modeling of wake steering and platform offsets for floating wind arrays

Journal Article · Mon Jun 10 00:00:00 EDT 2024 · Journal of Physics. Conference Series

DOI:https://doi.org/10.1088/1742-6596/2767/6/062035· OSTI ID:2396310

Lozon, Ericka ^[1]; Hall, Matthew ^[1]; Mahfouz, Mohammad Youssef ^[2]

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1. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
2. Univ. of Stuttgart (Germany)

Wake effects are a key challenge in the design and analysis of wind farms. For floating wind farms, the platforms offset under the aerodynamic loading of the turbine and are constrained by mooring systems that can vary significantly in allowable offsets. When considering wake steering, the crosswind offset of the turbine can counteract the lateral deflection of the wake. This work presents a tool to efficiently model the coupled impacts of wake steering and platform offsets for floating wind farms. The tool relies on the frequency-domain wind farm model RAFT and the steady-state wake model FLORIS. A verification with FAST.Farm is presented, then the tool is applied to a simple two-turbine case study. A range of mooring systems with increasing platform offsets and varied yaw misalignment angles are considered while comparing the impact on turbine power. Additional sensitivities to turbine spacing and mooring system orientation are explored. The results show that there is a least-optimal watch circle width for downwind turbine power production that varies with yaw misalignment angle and turbine spacing. Additionally, the turbine offsets under yaw-misaligned conditions vary significantly depending on mooring system orientation relative to the rotor plane, which in turn impacts the optimal misalignment angle. These results highlight the importance of including floating platform offsets and mooring systems in the evaluation of wake steering strategies for floating wind arrays.

• Research Organization: National Renewable Energy Laboratory (NREL), Golden, CO (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Wind Energy Technologies Office
• Grant/Contract Number: AC36-08GO28308
• OSTI ID: 2396310
• Report Number(s): NREL/JA--5000-88715; MainId:89494; UUID:bd420378-89c2-4d78-98ab-49d904de35a2; MainAdminId:72065
• Journal Information: Journal of Physics. Conference Series, Journal Name: Journal of Physics. Conference Series Journal Issue: 6 Vol. 2767; ISSN 1742-6588
• Publisher: IOP Publishing
• Country of Publication: United States
• Language: English

Related Subjects

17 WIND ENERGY
floating wind
mooring systems
wake effects