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Advances in Offshore Wind Power Systems: Design, Operation and Maintenance

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Energy Science and Technology".

Deadline for manuscript submissions: closed (30 December 2024) | Viewed by 1580

Special Issue Editors


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Guest Editor
Department of Civil and Environmental Engineering, Konkuk University, Seoul 05029, Republic of Korea
Interests: fixed/floating offshore structures; development of offshore structural analysis program (X-SEA); development of CAD-embedded pre/post processor
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 02841, Republic of Korea
Interests: offshore wind energy; structures; analysis

Special Issue Information

Dear Colleagues,

Offshore locations possess higher potential and less-constraining sources of wind energy compared to the onshore locations. In order to ensure the feasibility, viability, safety and serviceability of an offshore wind farm, an engineer needs to select the proper foundations for wind turbines and to develop feasible models at the design stage. The selection should be based on water depth, seabed conditions, installation equipment and supply chains. There are three common fixed types of offshore wind foundations: monopile, tripod and jacket support structures. A floating structure with turbines is anchored to the seabed through cables. It can be installed in deeper waters compared to traditional fixed offshore wind power, providing relatively more flexibility in site selection

Large-scale offshore wind farms are difficult to access easily, making immediate response to on-site situations challenging. Therefore, a systematic management system is necessary for installation and maintenance due to these access difficulties.

For this Special Issue, we invite authors to contribute their latest research on offshore wind farms, with topics including, but not limited to, the following:

  • Innovative concept design and technology;
  • Soil foundation and mooring system;
  • Aero-hydro-servo-elastic coupled analysis;
  • Design code;
  • Behavior of floating offshore structures;
  • Diffraction/radiation analysis of floating offshore;
  • Offshore wind installation, operations, monitoring and maintenance;
  • Structural and mechanical aspects of offshore wind support structures;
  • Electrical engineering of wind power;
  • Offshore concrete material;
  • Integrated load analysis of offshore wind turbine;
  • Drivetrain dynamics;
  • Field measurement and model test;
  • Wind energy resource assessment.

Prof. Dr. Ki-Du Kim
Prof. Dr. Goangseup Zi
Guest Editors

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Keywords

  • fixed offshore wind turbine
  • floating offshore wind turbine
  • dynamics of offshore structures
  • aero-hydro-servo-elastic coupled analysis
  • design code
  • mooring system
  • diffraction/radiation analysis
  • offshore wind installation, operations, monitoring and maintenance
  • offshore structural finite element analysis

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Published Papers (1 paper)

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Research

22 pages, 7411 KiB  
Article
Metaheuristic Optimized Semi-Active Structural Control Approaches for a Floating Offshore Wind Turbine
by Alejandro Ramírez, María Tomás-Rodríguez, Jesús Enrique Sierra-García and Matilde Santos
Appl. Sci. 2024, 14(23), 11368; https://doi.org/10.3390/app142311368 - 5 Dec 2024
Cited by 1 | Viewed by 1118
Abstract
Among all the existing possibilities within the renewable energies field, wind energy stands out due to the significant expansion of offshore turbines installed in coastal and deep-sea areas. Although the latter represent considerable energy generation potential due to their larger size and location [...] Read more.
Among all the existing possibilities within the renewable energies field, wind energy stands out due to the significant expansion of offshore turbines installed in coastal and deep-sea areas. Although the latter represent considerable energy generation potential due to their larger size and location in areas of strong winds, they are exposed to harsh environmental disturbances, particularly waves, causing these structures to experience vibrations, increasing in this way fatigue, reducing efficiency, and leading to higher maintenance and operational costs. In this work, vibration reduction is achieved using two structural control systems for a 5 MW barge-type floating offshore wind turbine (FOWT), tuned via a metaheuristic method, with genetic algorithms (GAs). Firstly, the standard deviation of the Top Tower Displacement (TTD) is used as a cost function in the GA to optimize a passive Tuned Mass Damper (TMD), resulting in a vibration suppression rate of 34.9% compared to a reference standard TMD. Additionally, two semi-active structural control systems based on a gain scheduling approach are proposed. In one of the approaches, the TMD parameters are optimized based on the amplitude of oscillations, achieving a suppression rate of 45.4%. In the second approach, the TMD parameters are optimized in real time for the identified wave frequencies, demonstrating superior performance for medium-high frequencies compared to the other TMDs. Full article
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