Complementary Airflow Control of Oscillating Water Columns for Floating Offshore Wind Turbine Stabilization

M’zoughi, Fares; Aboutalebi, Payam; Hernández, Izaskun Garrido; Hernández, A.; Sen, Manuel De la

doi:10.3390/math9121364

Cited by 20 publications

(10 citation statements)

References 31 publications

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“…To assess the efficiency of the suggested fuzzy-based airflow control for the OWC-FOWT, a comparative study with a PID-based airflow control has been performed. The PID control has been developed and implemented in a previous work in [45].…”

Section: Resultsmentioning

confidence: 99%

“…The simplicity of the FLC design, the unruffled operation, and the cheap cost of implementation demonstrate it as a promising control choice for this research work. This work proposes the combination of a FOWT with OWCs to harvest wave and wind power and to investigate the stabilization of the floating platform of the 5 MW FOWT by means of the integrated OWCs [45,46]. The studied floating system is the NREL 5 MW wind turbine fixed on top of a barge platform.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, a fuzzy airflow control has been suggested and implemented to effectively open or close the air valves of the incorporated OWCs collectively. The performance of the suggested fuzzy airflow control has been compared to a PID-based airflow control [45] and the standard barge FOWT.…”

Section: Introductionmentioning

confidence: 99%

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Fuzzy Airflow-Based Active Structural Control of Integrated Oscillating Water Columns for the Enhancement of Floating Offshore Wind Turbine Stabilization

M’zoughi

Garrido

et al. 2023

International Journal of Energy Research

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This paper presents the modeling and stabilization of a floating offshore wind turbine (FOWT) using oscillating water columns (OWCs) as active structural control. The novel concept of this work is to design a new FOWT platform using the ITI Energy barge with incorporated OWCs at opposite sides of the tower, in order to alleviate the unwanted system oscillations. The OWCs provide the necessary opposing forces to the bending moment of the wind upon the tower and the waves upon the floating barge platform. However, the forces have to be synchronized with the tilting of the system which will be ensured by the proposed fuzzy airflow control strategy. Using the platform pitch angle, the fuzzy airflow control opens the valve of one side and closes the valve of the other side accordingly. Results of simulation in comparison with the standard FOWT and a PID-based airflow control show the efficiency of the fuzzy airflow control and its superiority to decrease the platform pitching and the top tower fore-aft displacement.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fuzzy Airflow-Based Active Structural Control of Integrated Oscillating Water Columns for the Enhancement of Floating Offshore Wind Turbine Stabilization

M’zoughi

Garrido

et al. 2023

International Journal of Energy Research

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“…The power and dynamic performance of these hybrid systems were primarily explored. M'zoughi et al [18] studied a hybrid system consisting of two OWCs and an NREL 5MW wind turbine. They showed that OWCs reduced the pitch motion of the platform and the fore-aft displacement of the tower top, improving the stability of the platform.…”

Section: Of 17mentioning

confidence: 99%

Optimal Design and Performance Analysis of a Hybrid System Combining a Semi-Submersible Wind Platform and Point Absorbers

Zhou

Zhang

et al. 2023

JMSE

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Integrating point absorber wave energy converters (PAWECs) and an offshore floating wind platform provide a cost-effective way of joint wind and wave energy exploitation. However, the coupled dynamics of the complicated hybrid system and its influence on power performance are not well understood. Here, a frequency-domain-coupled hydrodynamics, considering the constraints and the power output through the relative motion between the PAWECs and the semi-submersible platform, is introduced to optimize the size, power take-off damping, and layout of the PAWECs. Results show that the annual wave power generation of a PAWEC can be improved by 30% using a 90° conical or a hemispherical bottom instead of a flat bottom. Additionally, while letting the PAWECs protrude out the sides of the triangular frame of the platform by a distance of 1.5 times the PAWEC radius, the total power generation can be improved by up to 18.2% without increasing the motion response of the platform. The PAWECs can reduce the resonant heave motion of the platform due to the power take-off damping force. This study provides a reference for the synergistic use of wave and wind energy.

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“…However, no model has so far been developed for FOWT coupled to OWCs that are suitable for closed-loop control. Recently, M’zoughi et al 45 demonstrated the feasibility of integrating two OWCs and Aboutalebi et al 46 the feasibility of four OWCs in barge platforms. Integrating four OWCs into a platform arises as a promising solution as an active structure control (Fig.…”

Section: Introductionmentioning

confidence: 99%

A regressive machine-learning approach to the non-linear complex FAST model for hybrid floating offshore wind turbines with integrated oscillating water columns

Ahmad

M’zoughi

Aboutalebi

et al. 2023

Sci Rep

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Offshore wind energy is getting increasing attention as a clean alternative to the currently scarce fossil fuels mainly used in Europe’s electricity supply. The further development and implementation of this kind of technology will help fighting global warming, allowing a more sustainable and decarbonized power generation. In this sense, the integration of Floating Offshore Wind Turbines (FOWTs) with Oscillating Water Columns (OWCs) devices arise as a promising solution for hybrid renewable energy production. In these systems, OWC modules are employed not only for wave energy generation but also for FOWTs stabilization and cost-efficiency. Nevertheless, analyzing and understanding the aero-hydro-servo-elastic floating structure control performance composes an intricate and challenging task. Even more, given the dynamical complexity increase that involves the incorporation of OWCs within the FOWT platform. In this regard, although some time and frequency domain models have been developed, they are complex, computationally inefficient and not suitable for neither real-time nor feedback control. In this context, this work presents a novel control-oriented regressive model for hybrid FOWT-OWCs platforms. The main objective is to take advantage of the predictive and forecasting capabilities of the deep-layered artificial neural networks (ANNs), jointly with their computational simplicity, to develop a feasible control-oriented and lightweight model compared to the aforementioned complex dynamical models. In order to achieve this objective, a deep-layered ANN model has been designed and trained to match the hybrid platform’s structural performance. Then, the obtained scheme has been benchmarked against standard Multisurf-Wamit-FAST 5MW FOWT output data for different challenging scenarios in order to validate the model. The results demonstrate the adequate performance and accuracy of the proposed ANN control-oriented model, providing a great alternative for complex non-linear models traditionally used and allowing the implementation of advanced control schemes in a computationally convenient, straightforward, and easy way.

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Complementary Airflow Control of Oscillating Water Columns for Floating Offshore Wind Turbine Stabilization

Cited by 20 publications

References 31 publications

Fuzzy Airflow-Based Active Structural Control of Integrated Oscillating Water Columns for the Enhancement of Floating Offshore Wind Turbine Stabilization

Fuzzy Airflow-Based Active Structural Control of Integrated Oscillating Water Columns for the Enhancement of Floating Offshore Wind Turbine Stabilization

Optimal Design and Performance Analysis of a Hybrid System Combining a Semi-Submersible Wind Platform and Point Absorbers

A regressive machine-learning approach to the non-linear complex FAST model for hybrid floating offshore wind turbines with integrated oscillating water columns

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