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Open AccessArticle

A Feedback Control Loop Optimisation Methodology for Floating Offshore Wind Turbines

1
Ikerlan Technology Research Centre, Control and Monitoring Area. P∘. J. M. Arizmendiarrieta 2, 20500 Arrasate-Mondragón, Spain
2
University of the Basque Country UPV/EHU, Electricity and Electronics Area. Bo. Sarriena s/n, 48940 Leioa, Spain
*
Author to whom correspondence should be addressed.
Energies 2019, 12(18), 3490; https://doi.org/10.3390/en12183490
Received: 1 July 2019 / Revised: 30 August 2019 / Accepted: 6 September 2019 / Published: 10 September 2019
(This article belongs to the Special Issue Optimal Control of Hybrid Systems and Renewable Energies)
Wind turbines usually present several feedback control loops to improve or counteract some specific performance or behaviour of the system. It is common to find these multiple feedback control loops in Floating Offshore Wind Turbines where the system perferformance is highly influenced by the platform dynamics. This is the case of the Aerodynamic Platform Stabiliser and Wave Rejection feedback control loops which are complementaries to the conventional generator speed PI control loop when it is working in an above rated wind speed region. The multiple feedback control loops sometimes can be tedious to manually improve the initial tuning. Therefore, this article presents a novel optimisation methodology based on the Monte Carlo method to automatically improve the manually tuned multiple feedback control loops. Damage Equivalent Loads are quantified for minimising the cost function and automatically update the control parameters. The preliminary results presented here show the potential of this novel optimisation methodology to improve the mechanical fatigue loads of the desired components whereas maintaining the overall performance of the wind turbine system. This methodology provides a good balance between the computational complexity and result effectiveness. The study is carried out with the fully coupled non-linear NREL 5-MW wind turbine model mounted on the ITI Energy’s barge and the FASTv8 code. View Full-Text
Keywords: floating offshore wind turbine; aerodynamic platform stabiliser; wave rejection; feedback loop; control; optimisation floating offshore wind turbine; aerodynamic platform stabiliser; wave rejection; feedback loop; control; optimisation
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MDPI and ACS Style

Olondriz, J.; Jugo, J.; Elorza, I.; and Aron Pujana-Arrese, S. .-Q. A Feedback Control Loop Optimisation Methodology for Floating Offshore Wind Turbines. Energies 2019, 12, 3490.

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