Articles | Volume 7, issue 4
https://doi.org/10.5194/wes-7-1641-2022
https://doi.org/10.5194/wes-7-1641-2022
Research article
 | 
04 Aug 2022
Research article |  | 04 Aug 2022

Vertical wake deflection for floating wind turbines by differential ballast control

Emmanouil M. Nanos, Carlo L. Bottasso, Simone Tamaro, Dimitris I. Manolas, and Vasilis A. Riziotis

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Revised manuscript accepted for WES
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Cited articles

Annoni, J., Scholbrock, A., Churchfield, M., and Fleming, P.: Evaluating tilt for wind plants, American Control Conference, 24–26 May 2017, Seattle, WA, USA, 717–722, https://doi.org/10.23919/ACC.2017.7963037, 2017. a, b, c, d, e, f
Azcona, J., Vittori, F., Schmidt, U., Savenije, F., Kapogiannis, G., Karvelas, C., Manolas, D. I., Voutsinas, S. G., Amann, F., Faerron-Guzman, R., and Lemmer, F.: D4.3.7: Design Solutions for 10 MW Floating Offshore Wind Turbines, Tech. rep., http://www.innwind.eu/ (last access: 31 July 2022), 2017. a, b
Bak, C., Zahle, F., Bitsche, R., Kim, T., Yde, A., Henriksen, L. C., Hansen, M. H., Blasques, J. P., Gaunaa, M., and Natarajan, A.: The DTU 10-MW Reference Wind Turbine, Danish Wind Power Research 2013, Technical University of Denmark, DTU Wind Energy, https://backend.orbit.dtu.dk/ws/portalfiles/portal/55645274/The_DTU_10MW_Reference_Turbine_Christian_Bak.pdf (last access: 31 July 2022), 2013. a
Bay, C. J., Annoni, J., Martínez-Tossas, L. A., Pao, L. Y., and Johnson, K. E.: Flow control leveraging downwind rotors for improved wind power plant operation, P. Amer. Contr. Conf., 20, 2843–2848, 2019. a, b
Burton, T., Sharpe, D., Jenkins, N., and Bossanyi, E.: Wind energy handbook, John Wiley & Sons, ISBN 13:978-1119451099, 2001. a
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Short summary
A novel way of wind farm control is presented where the wake is deflected vertically to reduce interactions with downstream turbines. This is achieved by moving ballast in a floating offshore platform in order to pitch the support structure and thereby tilt the wind turbine rotor disk. The study considers the effects of this new form of wake control on the aerodynamics of the steering and wake-affected turbines, on the structure, and on the ballast motion system.
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