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Aero-Hydrodynamic Coupled Dynamic Characteristics of Semi-Submersible floating offshore wind turbines Under Inflow Turbulence

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中国海洋工程:英文版 2023年第4期37卷 660-672页

作者： JIANG Hai-rui BAI Xing-lan Murilo A.VAZ School of Naval Architecture and Maritime Zhejiang Ocean UniversityZhoushan 316022China Key Laboratory of offshore Engineering Technology of Zhejiang Province Zhoushan 316022China Ocean Engineering Program Federal University of Rio de JaneiroRio de JaneiroBrazil

In this study,the frequency characteristics of the turbulent wind and the effects of wind-wave coupling on the low-and high-frequency responses of semi-submersible floating offshore wind turbines(FOWT)are *** wave load components,such as first-order wave loads,combined first-and second-order difference-frequency wave loads,combined first-and second-order sum-frequency wave loads,and first-and complete second-order wave loads are taken into consideration,while different turbulent environments are considered in aerodynamic *** com-parison is based on time histories and frequency spectra of platform motions and structural load responses and statistical *** findings indicate that the second-order difference-frequency wave loads will significantly increase the natural frequency of low-frequency motion in the responses of the platform motion and structure load of the semi-submersible platform,which will cause structural fatigue *** the action of turbulent wind,the influences of second-order wave loads on the platform motion and structural load response cannot be ignored,especially under extreme sea ***,in order to evaluate the dynamic responses of semi-submersible FOWT more accurately,the actual environment should be simulated more realistically.

关键词： turbulence characteristics floating offshore wind turbines second-order hydrodynamic loads low-and high-frequency responses aero-hydrodynamic coupling

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Current Status and Future Trends for Mooring Systems of floating offshore wind turbines

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Sustainable Marine Structures 2022年第2期4卷 40-54页

作者： Ruyan Yang Xiangyuan Zheng Jinlu Chen Yufei Wu Institute for Ocean Engineering Tsinghua University Shenzhen International Graduate SchoolGuangdongChina Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering Shenzhen UniversityShenzhen518060China

With the increasing demand of energy and the limitation of bottom-fixed wind turbines in moderate and deep waters,floating offshore wind turbines are doomed to be the right technical choice and they are bound to enter a new era of rapid *** mooring system is a vital system of a floating wind turbine for station-keeping under harsh environmental con*** terms of existing floating wind turbine projects,this paper is devoted to discussing the current status of mooring systems and mooring *** paper also presents the mooring analysis methods and points out the technical difficulties and challenges in mooring design,installation,operation and maintenance ***,the developing trends of the mooring system are summarized,aiming to provide a reference for future mooring research.

关键词： Mooring system Mooring equipment Mooring analysis floating offshore wind turbines Mooring line Anchor

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Shared mooring systems for offshore floating wind farms: A review

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Energy Reviews 2024年第1期3卷 76-89页

作者： Hang Xu Shengjie Rui Kanmin Shen Liangliang Jiang Haojie Zhang Long Teng Zhejiang Key Laboratory of offshore Geotechnics and Material College of Civil Engineering and ArchitectureZhejiang UniversityHangzhou310058China Norwegian Geotechnical Institute Sandakerveien 140Oslo0484Norway PowerChina Huadong Engineering Corporation Limited Hangzhou311122China Department of Chemical and Petroleum Engineering The University of CalgaryCalgaryAlbertaCanada

offshore wind energy,as a form of renewable power,has seen rapid development in recent *** fixedbottom wind turbines are typically used in water depths less than 50 m,the utilization of floating offshore wind turbines(FOWTs)becomes essential for deeper *** and effective mooring systems play a crucial role in making FOWTs commercially *** concept of a shared mooring system offers an innovative solution for deploying floating wind farms in clusters or arrays,which can reduce overall construction costs for large-scale floating wind *** is imperative to optimize the shared mooring arrangement for maximum cost-effectiveness and wind farm ***,implementing a shared mooring system introduces complexity to the dynamics of FOWTs,requiring the development of advanced simulation tools to meet modelling *** the shared mooring arrangement,mooring lines and anchors face more significant challenges,such as chain-seabed interactions,soil cyclic weakening,and anchor out-of-plane loading,which underscore the need for innovative,reliable,and efficient shared anchor *** article offers an overview of the current research status on shared mooring systems for floating wind farms,which might serve as a valuable reference for the construction of large-scale floating wind farms worldwide.

关键词： floating offshore wind turbines wind farm Shared mooring Shared anchor Renewable energy

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基于浮式风机实验与数值分析的方法论与挑战研究综述

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Journal of Marine Science and Application 2020年第3期19卷 339-361页

作者：陈鹏陈嘉豪胡志强 School of Engineering Newcastle UniversityNewcastle upon Tyne NE17RUUK Guangdong Electric Power Design Institute Co. Ltd.of China Energy Engineering GroupGuangzhou 510663China College of Shipbuilding Engineering Harbin Engineering UniversityHarbin 150001China

Due to the dissimilar scaling issues,the conventional experimental method of FOWTs can hardly be used directly to validate the full-scale global dynamic responses ***,it is of absolute necessity to find a more accurate,economic and efficient approach,which can be utilized to predict the full-scale global dynamic responses of *** this paper,a literature review of experimental-numerical methodologies and challenges for FOWTs is *** key challenges in the conventional basin experiment issues are discussed,including scaling issues;coupling effects between aero-hydro and structural dynamic responses;blade pitch control strategies;experimental facilities and calibration *** basin experiments,industrial projects and numerical codes are summarized to demonstrate the progress of hybrid experimental ***,time delay in hardware-in-the-loop challenges is concluded to emphasize their significant role in real-time hybrid *** is of great use to comprehend these methodologies and challenges,which can help some future researchers to make a footstone for proposing a more efficient and functional hybrid basin experimental and numerical method.

关键词： floating offshore wind turbines Hybrid approach Basin experiment Numerical simulation wind energy

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Gain-scheduling control of a floating offshore wind turbine above rated wind speed

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Control Theory and Technology 2015年第2期13卷 160-172页

作者： Omid BAGHERIEH Ryozo NAGAMUNE Department of Mechanical Engineering University of California at Berkeley 5146 Etcheverry Hall Department of Mechanical Engineering University of British Columbia 6250 Applied Science Lane

This paper presents an application of gain-scheduling(GS) control techniques to a floating offshore wind turbine on a barge platform for above rated wind speed cases. Special emphasis is placed on the dynamics variation of the wind turbine system caused by plant nonlinearity with respect to wind speed. The turbine system with the dynamics variation is represented by a linear parameter-varying(LPV) model, which is derived by interpolating linearized models at various operating wind speeds. To achieve control objectives of regulating power capture and minimizing platform motions, both linear quadratic regulator(LQR) GS and LPV GS controller design techniques are explored. The designed controllers are evaluated in simulations with the NREL 5 MW wind turbine model, and compared with the baseline proportional-integral(PI) GS controller and non-GS controllers. The simulation results demonstrate the performance superiority of LQR GS and LPV GS controllers, as well as the performance trade-off between power regulation and platform movement reduction.

关键词： wind energy gain-scheduling control linear parameter-varying model floating offshore wind turbines above rated wind speed power

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