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Lookup NU author(s): Professor Zhiqiang Hu
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
The theoretical feasibility of the power output strategy based on rotor cone angle control forultra-scale downwind wind turbines is studied in this paper via the Open FAST simulation platform.The performance of five cases, namely UW, DW, DWC, DW6, and DW6IC, which have differentrotor parameters or control strategies compared with the reference DTU 10 MW wind turbine, arecalculated and analyzed. It is found that the downwind rotors have significant advantages in reducingthe blade root load. The DW case reduces the peak load at the blade root by 22.54% at the cost of1.57% annual energy production loss. By extending the length and redesigning the stiffness of theblade, the DW6 case achieves 14.82% reduction in the peak load at the blade root and 1.67% increasein the annual energy production under the same blade weight as that of the UW. The DWC case withrotor cone angle control has the same aerodynamic performance as the DW case with the same bladeparameters. However, when the wind speed achieves or exceeds the rated speed, the blade root loaddecreases at a greater rate with the increasing wind speeds, and achieves minimum load with a windspeed of 16 m/s. Compared with the UW case, the DW6IC case with the improved rotor cone anglecontrol reduces the peak load of the blade root by 22.54%, leading to an increase in annual energyproduction by 1.12% accordingly.
Author(s): Li Z, Xu B, Shen X, Xiao H, Hu Z, Cai X
Publication type: Article
Publication status: Published
Journal: Energies
Year: 2022
Volume: 15
Issue: 18
Print publication date: 18/09/2022
Online publication date: 18/09/2022
Acceptance date: 15/09/2022
Date deposited: 20/09/2022
ISSN (electronic): 1996-1073
Publisher: MDPI
URL: https://doi.org/10.3390/en15186830
DOI: 10.3390/en15186830
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