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Journal articles on the topic 'Floating offshore wind turbines'

Author: Grafiati

Published: 10 March 2023

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1

Sclavounos, Paul. "Floating Offshore Wind Turbines." Marine Technology Society Journal 42, no. 2 (2008): 39–43. http://dx.doi.org/10.4031/002533208786829151.

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Wind is a rapidly growing renewable energy source, increasing at an annual rate of 30%, with the vast majority of wind power generated from onshore wind farms. The growth of these facilities, however, is limited by the lack of inexpensive land near major population centers and the visual impact caused by large wind turbines.Wind energy generated from floating offshore wind farms is the next frontier. Vast sea areas with stronger and steadier winds are available for wind farm development and 5 MW wind turbine towers located 20 miles from the coastline are invisible. Current offshore wind turbin

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2

Pham, Thanh-Dam, Minh-Chau Dinh, Hak-Man Kim, and Thai-Thanh Nguyen. "Simplified Floating Wind Turbine for Real-Time Simulation of Large-Scale Floating Offshore Wind Farms." Energies 14, no. 15 (2021): 4571. http://dx.doi.org/10.3390/en14154571.

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Floating offshore wind has received more attention due to its advantage of access to incredible wind resources over deep waters. Modeling of floating offshore wind farms is essential to evaluate their impacts on the electric power system, in which the floating offshore wind turbine should be adequately modeled for real-time simulation studies. This study proposes a simplified floating offshore wind turbine model, which is applicable for the real-time simulation of large-scale floating offshore wind farms. Two types of floating wind turbines are evaluated in this paper: the semi-submersible and

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Barooni, Mohammad, Turaj Ashuri, Deniz Velioglu Sogut, Stephen Wood, and Shiva Ghaderpour Taleghani. "Floating Offshore Wind Turbines: Current Status and Future Prospects." Energies 16, no. 1 (2022): 2. http://dx.doi.org/10.3390/en16010002.

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Offshore wind energy is a sustainable renewable energy source that is acquired by harnessing the force of the wind offshore, where the absence of obstructions allows the wind to travel at higher and more steady speeds. Offshore wind has recently grown in popularity because wind energy is more powerful offshore than on land. Prior to the development of floating structures, wind turbines could not be deployed in particularly deep or complicated seabed locations since they were dependent on fixed structures. With the advent of floating structures, which are moored to the seabed using flexible anc

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Ahmad, Aabas. "Load Reduction of Floating Wind Turbines Using Tuned Mass Dampers." International Journal for Research in Applied Science and Engineering Technology 9, no. 9 (2021): 1298–303. http://dx.doi.org/10.22214/ijraset.2021.38178.

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Abstract: Offshore wind turbines have the potential to be an important part of the United States’ energy production profile in the coming years. In order to accomplish this wind integration, offshore wind turbines need to be made more reliable and cost efficient to be competitive with other sources of energy. To capitalize on high speed and highquality winds over deep water, floating platforms for offshore wind turbines have been developed, but they suffer from greatly increased loading. One method to reduce loadsin offshore wind turbines is the application of structural control techniques usu

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Roddier, Dominique, and Joshua Weinstein. "Floating Wind Turbines." Mechanical Engineering 132, no. 04 (2010): 28–32. http://dx.doi.org/10.1115/1.2010-apr-2.

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This article discusses the functioning of floating wind turbines. The engineering requirements for the design of floating offshore wind turbines are extensive. Wind turbine design tools usually consist of an aerodynamic model (for flow around the blades) coupled with a structural code. Aero-elastic models used in the design of fixed turbines calculate all the necessary loading parameters, from turbine thrust and power generation, to blade and tower deflections. The design of floating structures usually involves hydrodynamics tools such as WAMIT Inc.’s software for studying wave interactions wi

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Li, Jiawen, Jingyu Bian, Yuxiang Ma, and Yichen Jiang. "Impact of Typhoons on Floating Offshore Wind Turbines: A Case Study of Typhoon Mangkhut." Journal of Marine Science and Engineering 9, no. 5 (2021): 543. http://dx.doi.org/10.3390/jmse9050543.

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A typhoon is a restrictive factor in the development of floating wind power in China. However, the influences of multistage typhoon wind and waves on offshore wind turbines have not yet been studied. Based on Typhoon Mangkhut, in this study, the characteristics of the motion response and structural loads of an offshore wind turbine are investigated during the travel process. For this purpose, a framework is established and verified for investigating the typhoon-induced effects of offshore wind turbines, including a multistage typhoon wave field and a coupled dynamic model of offshore wind turb

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Pham, Thi Quynh Mai, Sungwoo Im, and Joonmo Choung. "Prospects and Economics of Offshore Wind Turbine Systems." Journal of Ocean Engineering and Technology 35, no. 5 (2021): 382–92. http://dx.doi.org/10.26748/ksoe.2021.061.

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In recent years, floating offshore wind turbines have attracted more attention as a new renewable energy resource while bottom-fixed offshore wind turbines reach their limit of water depth. Various projects have been proposed with the rapid increase in installed floating wind power capacity, but the economic aspect remains as a biggest issue. To figure out sensible approaches for saving costs, a comparison analysis of the levelized cost of electricity (LCOE) between floating and bottom-fixed offshore wind turbines was carried out. The LCOE was reviewed from a social perspective and a cost brea

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Maimon, Aurel Dan. "Floating offshore wind turbines - technology and potential." Analele Universităţii "Dunărea de Jos" din Galaţi. Fascicula XI, Construcţii navale/ Annals of "Dunărea de Jos" of Galati, Fascicle XI, Shipbuilding 43 (December 15, 2020): 89–94. http://dx.doi.org/10.35219/annugalshipbuilding.2020.43.11.

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"The main purpose of this paper is to present a short review of the actual progress on the floating offshore wind turbines. Floating offshore wind turbines have several advantages: overcoming the depth constraint, floating offshore wind turbines can be installed further offshore and therefore on the one hand have little or no visual impact from the coast, and on the other hand to take advantage of more constant and stronger winds, thus increasing the production efficiency of electricity. They are assembled to port and then transported to site with an ordinary tug, which can also bring them ash

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Yang, Wenxian, Wenye Tian, Ole Hvalbye, Zhike Peng, Kexiang Wei, and Xinliang Tian. "Experimental Research for Stabilizing Offshore Floating Wind Turbines." Energies 12, no. 10 (2019): 1947. http://dx.doi.org/10.3390/en12101947.

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Floating turbines are attracting increasing interest today. However, the power generation efficiency of a floating turbine is highly dependent on its motion stability in sea water. This issue is more marked, particularly when the floating turbines operate in relatively shallow water. In order to address this issue, a new concept motion stabilizer is studied in this paper. It is a completely passive device consisting of a number of heave plates. The plates are connected to the foundation of the floating wind turbine via structural arms. Since the heave plates are completely, rather than partial

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Raisanen, Jack H., Stig Sundman, and Troy Raisanen. "Unmoored: a free-floating wind turbine invention and autonomous open-ocean wind farm concept." Journal of Physics: Conference Series 2362, no. 1 (2022): 012032. http://dx.doi.org/10.1088/1742-6596/2362/1/012032.

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This paper contributes to emerging deep offshore wind literature by presenting the design for a novel free-floating offshore wind turbine for deep water use. The wind turbine uses one large underwater propeller to maintain its position and move as needed, while two small propellers turn the unit. This allows access to areas of high energy production potential in the open ocean out of reach to contemporary floating wind turbines, which are anchored to the seabed. An autonomous ocean-based wind farm concept is also presented. Together, the semi-autonomous wind turbines form a floating wind farm

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11

Luo, Ning Su. "Structural Control Issues in New Generation Offshore Wind Energy Plants." Advances in Science and Technology 83 (September 2012): 167–76. http://dx.doi.org/10.4028/www.scientific.net/ast.83.167.

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A new constructive solution for the offshore wind power generation is to use floating wind turbines. An offshore wind farm situated sufficiently far away from the coast can generate more wind power and will have a longer operation life since the wind is stronger and more consistent than that on or near the coast. One of the main challenges is to reduce the fatigue of a floating wind turbine so as to guarantee its proper functioning under the constraints imposed by the floating support platforms. This paper will discuss the structural control issues related to the mitigation of dynamic wind and

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12

Senga, Hidetaka, Hiroki Umemoto, and Hiromichi Akimoto. "Verification of Tilt Effect on the Performance and Wake of a Vertical Axis Wind Turbine by Lifting Line Theory Simulation." Energies 15, no. 19 (2022): 6939. http://dx.doi.org/10.3390/en15196939.

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Renewable energy has received a lot of attention. In recent years, offshore wind power has received particular attention among renewable energies. Fixed-type offshore wind turbines are now the most popular. However, because of the deep seas surrounding Japan, floating types are more preferable. The floating system is one of the factors that raises the cost of floating wind turbines. Vertical axis wind turbines (VAWT) have a low center of gravity and can tilt their rotors. As a result, a smaller floating body and a lower cost are expected. A mechanism called a floating axis wind turbine (FAWT)

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13

Guo, Xiaojiang, Yu Zhang, Jiatao Yan, et al. "Integrated Dynamics Response Analysis for IEA 10-MW Spar Floating Offshore Wind Turbine." Journal of Marine Science and Engineering 10, no. 4 (2022): 542. http://dx.doi.org/10.3390/jmse10040542.

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Wind energy in the deep-sea area is more abundant and the capacity of wind turbines can be made larger. Therefore, the research on deep-sea floating offshore wind turbines will be the primary strategy for wind energy exploitation in the future. The spar-type platform depends on the characteristics of a small water plane, deep draft, and good stability, which has been applied to the commercial development of deep-sea wind energy. In the next ten years, the 10-MW wind turbine will become the mainstream class installed in the floating offshore wind turbine farm. Thus, it is very necessary to cond

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14

Jessen, Kasper, Kasper Laugesen, Signe M. Mortensen, Jesper K. Jensen, and Mohsen N. Soltani. "Experimental Validation of Aero-Hydro-Servo-Elastic Models of a Scaled Floating Offshore Wind Turbine." Applied Sciences 9, no. 6 (2019): 1244. http://dx.doi.org/10.3390/app9061244.

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Floating offshore wind turbines are complex dynamical systems. The use of numerical models is an essential tool for the prediction of the fatigue life, ultimate loads and controller design. The simultaneous wind and wave loading on a non-stationary foundation with a flexible tower makes the development of numerical models difficult, the validation of these numerical models is a challenging task as the floating offshore wind turbine system is expensive and the testing of these may cause loss of the system. The validation of these numerical models is often made on scaled models of the floating o

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Kakuya, Hiromu, Takashi Shiraishi, Shigeo Yoshida, Tomoaki Utsunomiya, and Iku Sato. "Experimental results of floating platform vibration control with mode change function using full-scale spar-type floating offshore wind turbine." Wind Engineering 42, no. 3 (2017): 230–42. http://dx.doi.org/10.1177/0309524x17737336.

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Floating offshore wind turbines have great potential for harvesting renewable energy sources since offshore wind is stronger and more stable than onshore wind. The foundations of floating offshore wind turbines are not rigidly fixed and it leads to vibration of the floating platform pitch angle. This vibration is caused by fast blade pitch angle motions of variable speed control for controlling rotor speed at rated values. This study proposes a control method to address this vibration, floating platform vibration control. This method extracts a natural frequency component of the vibration from

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16

Li, Junlai, Weiguo Wu, Yu Wei, et al. "Study on Dynamic Response of Offshore Wind Turbine Structure Under Typhoon." Polish Maritime Research 29, no. 1 (2022): 34–42. http://dx.doi.org/10.2478/pomr-2022-0004.

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Abstract Floating offshore wind turbines are easily affected by typhoons in the deep sea, which may cause serious damage to their structure. Therefore, it is necessary to study further the dynamic response of wind turbine structures under typhoons. This paper took the 5MW floating offshore wind turbine developed by the National Renewable Energy Laboratory (NREL) as the research object. Based on the motion theory of platforms in waves, a physical model with a scale ratio of 1:120 was established, and a hydraulic cradle was used to simulate the effect of waves on the turbines. The dynamic respon

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Li, Junlai, Weiguo Wu, Yu Wei, et al. "Study on Dynamic Response of Offshore Wind Turbine Structure Under Typhoon." Polish Maritime Research 29, no. 1 (2022): 34–42. http://dx.doi.org/10.2478/pomr-2022-0004.

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Abstract Floating offshore wind turbines are easily affected by typhoons in the deep sea, which may cause serious damage to their structure. Therefore, it is necessary to study further the dynamic response of wind turbine structures under typhoons. This paper took the 5MW floating offshore wind turbine developed by the National Renewable Energy Laboratory (NREL) as the research object. Based on the motion theory of platforms in waves, a physical model with a scale ratio of 1:120 was established, and a hydraulic cradle was used to simulate the effect of waves on the turbines. The dynamic respon

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18

Crowle, A. P., and PR Thies. "Construction and installation engineering for floating wind turbines." MATEC Web of Conferences 355 (2022): 03068. http://dx.doi.org/10.1051/matecconf/202235503068.

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The construction and installation engineering of floating offshore wind turbines is important to minimize schedules and costs. Floating offshore wind turbine substructures are an expanding sector within renewable power generation, offering an opportunity to deliver green energy, in new areas offshore. The floating nature of the substructures permits wind turbine placement in deep water locations. This paper investigates the construction and installation challenges for the various floating offshore wind types. It is concluded that priority areas for project management and design engineers minim

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19

Yildiz, Nurullah, Hassan Hemida, and Charalampos Baniotopoulos. "Life Cycle Assessment of a Barge-Type Floating Wind Turbine and Comparison with Other Types of Wind Turbines." Energies 14, no. 18 (2021): 5656. http://dx.doi.org/10.3390/en14185656.

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The intensive increase of global warming every year affects our world negatively and severely. The use of renewable energy sources has gained importance in reducing and eliminating the effect of global warming. To this end, new technologies are being developed to facilitate the use of these resources. One of these technological developments is the floating wind turbine. In order to evaluate the respective environmental footprint of these systems, a life cycle assessment (LCA) is herein applied. In this study, the environmental impact of floating wind turbines is investigated using a life cycle

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20

Liu, Zhenqing, Yicheng Fan, Wei Wang, and Guowei Qian. "Numerical Study of a Proposed Semi-Submersible Floating Platform with Different Numbers of Offset Columns Based on the DeepCwind Prototype for Improving the Wave-Resistance Ability." Applied Sciences 9, no. 6 (2019): 1255. http://dx.doi.org/10.3390/app9061255.

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DeepCwind semi-submersible floating offshore wind turbines have been widely examined, and in some countries this type of floating offshore wind turbine has been adopted in the construction of floating wind farms. However, the DeepCwind semi-submersible floating offshore wind turbines still experience large surge motion that limits their operational time. Therefore, in this study, a semi-submersible floating platform with different numbers of offset columns, but with the same total weight, based on the DeepCwind prototype is proposed. From the free-decay test, it was found that the number of th

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21

Afjeh, Abdollah A., Brett Andersen, Jin Woo Lee, Mahdi Norouzi, and Efstratios Nikolaidis. "Advanced Concept Offshore Wind Turbine Development." Journal of Advanced Computational Intelligence and Intelligent Informatics 18, no. 5 (2014): 728–35. http://dx.doi.org/10.20965/jaciii.2014.p0728.

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Development of novel offshore wind turbine designs and technologies are necessary to reduce the cost of offshore wind energy since offshore wind turbines need to withstand ice and waves in addition to wind, a markedly different environment from their onshore counterparts. This paper focuses on major design challenges of offshore wind turbines and offers an advanced concept wind turbine that can significantly reduce the cost of offshore wind energy as an alternative to the current popular designs. The design consists of a two-blade, downwind rotor configuration fitted to a fixed bottom or float

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22

Russell, A. J., M. Collu, A. McDonald, P. R. Thies, A. Mortimer, and A. R. Quayle. "Review of LIDAR-assisted Control for Offshore Wind Turbine Applications." Journal of Physics: Conference Series 2362, no. 1 (2022): 012035. http://dx.doi.org/10.1088/1742-6596/2362/1/012035.

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Nacelle-mounted, forward-facing Light Detection and Ranging (LIDAR) technology is able to provide knowledge of the incoming wind so that wind turbines can prepare in advance, through feedforward control. LIDAR can aid in improving wind turbine performance across the full operating range, assisting with torque control in below rated wind speeds, pitch control in above rated wind speeds and yaw control for correctly aligning the turbine rotor with the incoming wind direction. The motivations are for decreasing structural loads, resulting in reduced maintenance and extended lifetimes of turbines

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23

Lee, Sang, Matthew Churchfield, Frederick Driscoll, et al. "Load Estimation of Offshore Wind Turbines." Energies 11, no. 7 (2018): 1895. http://dx.doi.org/10.3390/en11071895.

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The influence of 3 MW Hywind-II wind turbine wakes from an upstream offshore floating wind turbine on a downstream turbine with a separation distance of seven rotor diameters was studied for a site in the Gulf of Maine. The turbines and the platforms were subjected to atmospheric boundary layer flows. Various sensitivity studies on fatigue loads with respect to the positions of the downstream turbine were performed and validated with a large-eddy simulation tool. In particular, the effect of various lateral positions of the downstream turbine relative to the upstream turbine were considered us

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Aird, Jeanie, Evan Gaertner, and Matthew Lackner. "Dynamic prescribed-wake vortex method for aerodynamic analysis of offshore floating wind turbines." Wind Engineering 43, no. 1 (2018): 47–63. http://dx.doi.org/10.1177/0309524x18819897.

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A prescribed-wake vortex model for evaluating the aerodynamic loads on offshore floating turbines has been developed. As an extension to the existing UMass analysis tool, WInDS, the developed model uses prescribed empirical wake node velocity functions to model aerodynamic loading. This model is applicable to both dynamic flow conditions and dynamic rotational and translational platform motions of floating offshore turbines. With this model, motion-induced wake perturbations can be considered, and their effect on induction can be modeled, which is useful for floating offshore wind turbine desi

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Bashetty, Srikanth, and Selahattin Ozcelik. "Review on Dynamics of Offshore Floating Wind Turbine Platforms." Energies 14, no. 19 (2021): 6026. http://dx.doi.org/10.3390/en14196026.

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This paper presents a literature review of the dynamics of offshore floating wind turbine platforms. When moving further offshore, there is an increase in the capacity of wind power. Generating power from renewable resources is enhanced through the extraction of wind energy from an offshore deep-water wind resource. Mounting the turbine on a platform that is not stable brings another difficulty to wind turbine modeling. There is a need to introduce platforms that are more effective to capture this energy, because of the complex dynamics and control of these platforms. This paper highlights the

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Xiao, Shuolin, and Di Yang. "Large-Eddy Simulation-Based Study of Effect of Swell-Induced Pitch Motion on Wake-Flow Statistics and Power Extraction of Offshore Wind Turbines." Energies 12, no. 7 (2019): 1246. http://dx.doi.org/10.3390/en12071246.

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In this study, the effects of ocean swell waves and swell-induced pitch motion on the wake-flow statistics and power extraction of floating wind turbines are numerically investigated. A hybrid numerical model coupling wind large-eddy (LES) and high-order spectral-wave simulations is employed to capture the effects of ocean swell waves on offshore wind. In the simulation, 3 × 3 floating wind turbines with prescribed pitch motions were modeled using the actuator disk model. The turbulence statistics and wind-power extraction rate for the floating turbines are quantified and compared to a referen

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27

Xu, B. F., T. G. Wang, Y. Yuan, and J. F. Cao. "Unsteady aerodynamic analysis for offshore floating wind turbines under different wind conditions." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 373, no. 2035 (2015): 20140080. http://dx.doi.org/10.1098/rsta.2014.0080.

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A free-vortex wake (FVW) model is developed in this paper to analyse the unsteady aerodynamic performance of offshore floating wind turbines. A time-marching algorithm of third-order accuracy is applied in the FVW model. Owing to the complex floating platform motions, the blade inflow conditions and the positions of initial points of vortex filaments, which are different from the fixed wind turbine, are modified in the implemented model. A three-dimensional rotational effect model and a dynamic stall model are coupled into the FVW model to improve the aerodynamic performance prediction in the

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Li, Jiawen, Zhenni Li, Yichen Jiang, and Yougang Tang. "Typhoon Resistance Analysis of Offshore Wind Turbines: A Review." Atmosphere 13, no. 3 (2022): 451. http://dx.doi.org/10.3390/atmos13030451.

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A typhoon is a tropical cyclone in the western Pacific Ocean and the China seas. Typhoons are some of the most destructive natural disasters on Earth. In China, typhoons have had major impacts on the stability and structural integrity of offshore wind turbines in the complex and harsh marine environment. In this research, first, the main causes of wind turbine damage were analyzed based on the characteristics of a typhoon and a wind turbine structure for typical typhoon-induced accidents. Second, the research progress of the anti-typhoon design of offshore wind turbines and the anti-typhoon st

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Li, He, A. P. Teixeira, and C. Guedes Soares. "An Improved Failure Mode and Effect Analysis of Floating Offshore Wind Turbines." Journal of Marine Science and Engineering 10, no. 11 (2022): 1616. http://dx.doi.org/10.3390/jmse10111616.

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This paper proposes an improved failure mode and effect analysis method for a comprehensive failure analysis that provides a holistic perspective of actions on the potential failures of floating offshore wind turbines. A new way of constructing risk priority numbers was developed by considering the background knowledge of the specialists involved in the failure analysis. The failure analysis was conducted based on an extensive dataset from multiple specialists that covers five floating offshore wind turbine systems, 15 main components, 42 failure modes, and 104 failure causes. Consequently, 21

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Lavanya, C., and Nandyala Darga Kumar. "Foundation Types for Land and Offshore Sustainable Wind Energy Turbine Towers." E3S Web of Conferences 184 (2020): 01094. http://dx.doi.org/10.1051/e3sconf/202018401094.

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Wind energy is the renewable sources of energy and it is used to generate electricity. The wind farms can be constructed on land and offshore where higher wind speeds are prevailing. Most offshore wind farms employ fixed-foundation wind turbines in relatively shallow water. In deep waters floating wind turbines have gained popularity and are recent development. This paper discusses the various types of foundations which are in practice for use in wind turbine towers installed on land and offshore. The applicability of foundations based on depth of seabed and distance of wind farm from the shor

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Bhattacharya, Subhamoy, Suryakanta Biswal, Muhammed Aleem, et al. "Seismic Design of Offshore Wind Turbines: Good, Bad and Unknowns." Energies 14, no. 12 (2021): 3496. http://dx.doi.org/10.3390/en14123496.

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Large scale offshore wind farms are relatively new infrastructures and are being deployed in regions prone to earthquakes. Offshore wind farms comprise of both offshore wind turbines (OWTs) and balance of plants (BOP) facilities, such as inter-array and export cables, grid connection etc. An OWT structure can be either grounded systems (rigidly anchored to the seabed) or floating systems (with tension legs or catenary cables). OWTs are dynamically-sensitive structures made of a long slender tower with a top-heavy mass, known as Nacelle, to which a heavy rotating mass (hub and blades) is attach

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He, Er Ming, Ya Qi Hu, Yang Zhang, and Ge Liang Yin. "Vibration and Load Suppression of Offshore Floating Wind Turbine." Advanced Materials Research 1025-1026 (September 2014): 891–96. http://dx.doi.org/10.4028/www.scientific.net/amr.1025-1026.891.

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The application of tuned mass dampers (TMDs) to offshore wind turbines has a huge potential to suppress the large vibration responses of these systems. Control module of TMDs is added into the wind turbine structural dynamics simulation code FAST and fully coupled aero-hydro-TMD-structural dynamics model of the 5MW Barge-type floating wind turbine by National Renewable Energy Laboratory (NREL) is established. A multi-parameter optimization study is performed to determine the optimal parameters of a fore-aft TMD system in the Barge-type model. The wind turbine model equipped with the optimal TM

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Cottura, Lorenzo, Riccardo Caradonna, Alberto Ghigo, Riccardo Novo, Giovanni Bracco, and Giuliana Mattiazzo. "Dynamic Modeling of an Offshore Floating Wind Turbine for Application in the Mediterranean Sea." Energies 14, no. 1 (2021): 248. http://dx.doi.org/10.3390/en14010248.

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Wind power is emerging as one of the most sustainable and low-cost options for energy production. Far-offshore floating wind turbines are attractive in view of exploiting high wind availability sites while minimizing environmental and landscape impact. In the last few years, some offshore floating wind farms were deployed in Northern Europe for technology validation, with very promising results. At present time, however, no offshore wind farm installations have been developed in the Mediterranean Sea. The aim of this work is to comprehensively model an offshore floating wind turbine and examin

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Matha, Denis, Frank Sandner, Climent Molins, Alexis Campos, and Po Wen Cheng. "Efficient preliminary floating offshore wind turbine design and testing methodologies and application to a concrete spar design." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 373, no. 2035 (2015): 20140350. http://dx.doi.org/10.1098/rsta.2014.0350.

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The current key challenge in the floating offshore wind turbine industry and research is on designing economic floating systems that can compete with fixed-bottom offshore turbines in terms of levelized cost of energy. The preliminary platform design, as well as early experimental design assessments, are critical elements in the overall design process. In this contribution, a brief review of current floating offshore wind turbine platform pre-design and scaled testing methodologies is provided, with a focus on their ability to accommodate the coupled dynamic behaviour of floating offshore wind

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Jenkins, Brian, Ian Belton, James Carroll, and David McMillan. "Estimating the major replacement rates in next-generation offshore wind turbines using structured expert elicitation." Journal of Physics: Conference Series 2362, no. 1 (2022): 012020. http://dx.doi.org/10.1088/1742-6596/2362/1/012020.

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With offshore wind turbines continuing to increase in size and move further offshore and into harsher environments, the complexity of carrying out the major replacement of large components is expected to pose a significant challenge for future offshore wind farms. However, the rate of major replacement operations that will be required in these next generation offshore wind turbines is currently unknown. Using a structured expert elicitation method, based on the Classical Model and implemented using EFSA guidance for the practical application of structured expert elicitation, major replacement

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Pustina, Luca, Francesco Biral, and Jacopo Serafini. "A novel Nonlinear Model Predictive Controller for Power Maximization on Floating Offshore Wind Turbines." Journal of Physics: Conference Series 2265, no. 4 (2022): 042002. http://dx.doi.org/10.1088/1742-6596/2265/4/042002.

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Abstract Reducing the Levelized Cost of Energy is the main objective of wind turbine industry, in particular for the emerging sector of floating offshore turbines. In this work, a novel Economic Nonlinear Model Predictive Control (ENMPC) strategy is developed to maximize the power production of floating offshore wind turbines. The control problem is solved through an indirect method, which achieves the computational efficiency required to apply it in real world cases. A non-linear Reduced Order Model of the floating turbine predicts aerodynamic power, generator temperature and platform motions

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Abbas, Nikhar J., Daniel S. Zalkind, Lucy Pao, and Alan Wright. "A reference open-source controller for fixed and floating offshore wind turbines." Wind Energy Science 7, no. 1 (2022): 53–73. http://dx.doi.org/10.5194/wes-7-53-2022.

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Abstract. This paper describes the development of a new reference controller framework for fixed and floating offshore wind turbines that greatly facilitates controller tuning and represents standard industry practices. The reference wind turbine controllers that are most commonly cited in the literature have been developed to work with specific reference wind turbines. Although these controllers have provided standard control functionalities, they are often not easy to modify for use on other turbines, so it has been challenging for researchers to run representative, fully dynamic simulations

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Zhang, Ruo Yu, Chao He Chen, You Gang Tang, and Xiao Yan Huang. "Research Development and Key Technical on Floating Foundation for Offshore Wind Turbines." Advanced Materials Research 446-449 (January 2012): 1014–19. http://dx.doi.org/10.4028/www.scientific.net/amr.446-449.1014.

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The water area in which water depth is deeper than 50m has special advantage in wind turbine generation, because there are the stable wind speed and small Wind-shear. In such sea area, the offshore wind energy generating equipments should be set up on floating foundation structure. Therefore, it is of great significance to study the floating foundation structures that are available for offshore wind energy generation for the industrialization of the offshore wind power generation. In this paper, the basic type and working principles are reviewed for some novel floating structures developed in

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Ahmad, Aabas. "Analysis of Load Reduction of Floating Wind Turbines Using Passive Tuned Mass Dampers." International Journal for Research in Applied Science and Engineering Technology 9, no. 9 (2021): 1340–45. http://dx.doi.org/10.22214/ijraset.2021.38179.

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Abstract: An efficient method for restraining the large vibration displacements and loads of offshore floating wind turbines under harsh marine environment is proposed by putting tuned mass dampers in the cabin. A dynamics model for a barge-type offshore floating wind turbine with a fore–aft tuned mass damper is established based on Lagrange’s equations; the nonlinear least squares Leven berg–Marquardt algorithm is employed to identify the parameters of the wind turbine; different parameter optimization methods are adopted to optimize tuned mass damper parameters by considering the standard de

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Ghigo, Alberto, Lorenzo Cottura, Riccardo Caradonna, Giovanni Bracco, and Giuliana Mattiazzo. "Platform Optimization and Cost Analysis in a Floating Offshore Wind Farm." Journal of Marine Science and Engineering 8, no. 11 (2020): 835. http://dx.doi.org/10.3390/jmse8110835.

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Floating offshore wind represents a new frontier of renewable energies. The absence of a fixed structure allows exploiting wind potential in deep seas, like the Atlantic Ocean and Mediterranean Sea, characterized by high availability and wind potential. However, a floating offshore wind system, which includes an offshore turbine, floating platform, moorings, anchors, and electrical system, requires very high capital investments: one of the most relevant cost items is the floating substructure. This work focuses on the choice of a floating platform that minimizes the global weight, in order to

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Cevasco, D., M. Collu, CM Rizzo, and M. Hall. "On mooring line tension and fatigue prediction for offshore vertical axis wind turbines: A comparison of lumped mass and quasi-static approaches." Wind Engineering 42, no. 2 (2018): 97–107. http://dx.doi.org/10.1177/0309524x18756962.

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Despite several potential advantages, relatively few studies and design support tools have been developed for floating vertical axis wind turbines. Due to the substantial aerodynamics differences, the analyses of vertical axis wind turbine on floating structures cannot be easily extended from what have been already done for horizontal axis wind turbines. Therefore, the main aim of the present work is to compare the dynamic response of the floating offshore wind turbine system adopting two different mooring dynamics approaches. Two versions of the in-house aero-hydro-mooring coupled model of dy

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Nejad, Amir R., and Jone Torsvik. "Drivetrains on floating offshore wind turbines: lessons learned over the last 10 years." Forschung im Ingenieurwesen 85, no. 2 (2021): 335–43. http://dx.doi.org/10.1007/s10010-021-00469-8.

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AbstractThis paper presents lessons learned from own research studies and field experiments with drivetrains on floating wind turbines over the last ten years. Drivetrains on floating support structures are exposed to wave-induced motions in addition to wind loading and motions. This study investigates the drivetrain-floater interactions from two different viewpoints: how drivetrain impacts the sub-structure design; and how drivetrain responses and life are affected by the floater and support structure motion. The first one is linked to the drivetrain technology and layout, while the second qu

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Piscopo, Vincenzo, Antonio Scamardella, Giovanni Battista Rossi, Francesco Crenna, and Marta Berardengo. "Fatigue Assessment of Moorings for Floating Offshore Wind Turbines by Advanced Spectral Analysis Methods." Journal of Marine Science and Engineering 10, no. 1 (2021): 37. http://dx.doi.org/10.3390/jmse10010037.

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The fatigue assessment of mooring lines for floating offshore wind turbines represents a challenging issue not only for the reliable design of the stationkeeping system but also for the economic impact on the installation and maintenance costs over the entire lifetime of the offshore wind farm. After a brief review about the state-of-art, the nonlinear time-domain hydrodynamic model of floating offshore wind turbines moored by chain cables is discussed. Subsequently, the assessment of the fatigue damage in the mooring lines is outlined, focusing on the combined-spectrum approach. The relevant

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Yan, Fa Suo, Hong Wei Wang, Jun Zhang, and Da Gang Zhang. "Influence of Wind Turbine Aero-Elastic Load on Dynamic Response of Floating Platform." Advanced Materials Research 608-609 (December 2012): 649–52. http://dx.doi.org/10.4028/www.scientific.net/amr.608-609.649.

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A numerical code, known as COUPLE, which has been developed to perform hydrodynamic analysis of floating body with a mooring system, is extended to collaborate with FAST to evaluate the interactions between wind turbine and its floating base. FAST is developed by National Renewable Energy Lab (NREL) for aeroelastic simulation of wind turbines. A dynamic response analysis of a spar type floating wind turbine system is carried out by the method. Two types of simulation of wind load are used in the analysis. One type is a constant steady force and the other is a six-component dynamic load from a

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Elusakin, Tobi, Mahmood Shafiee, Tosin Adedipe, and Fateme Dinmohammadi. "A Stochastic Petri Net Model for O&M Planning of Floating Offshore Wind Turbines." Energies 14, no. 4 (2021): 1134. http://dx.doi.org/10.3390/en14041134.

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With increasing deployment of offshore wind farms further from shore and in deeper waters, the efficient and effective planning of operation and maintenance (O&M) activities has received considerable attention from wind energy developers and operators in recent years. The O&M planning of offshore wind farms is a complicated task, as it depends on many factors such as asset degradation rates, availability of resources required to perform maintenance tasks (e.g., transport vessels, service crew, spare parts, and special tools) as well as the uncertainties associated with weather and clim

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Bayati, I., M. Belloli, L. Bernini, and A. Zasso. "Wind Tunnel Wake Measurements of Floating Offshore Wind Turbines." Energy Procedia 137 (October 2017): 214–22. http://dx.doi.org/10.1016/j.egypro.2017.10.375.

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Arredondo-Galeana, Abel, and Feargal Brennan. "Floating Offshore Vertical Axis Wind Turbines: Opportunities, Challenges and Way Forward." Energies 14, no. 23 (2021): 8000. http://dx.doi.org/10.3390/en14238000.

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The offshore wind sector is expanding to deep water locations through floating platforms. This poses challenges to horizontal axis wind turbines (HAWTs) due to the ever growing size of blades and floating support structures. As such, maintaining the structural integrity and reducing the levelised cost of energy (LCoE) of floating HAWTs seems increasingly difficult. An alternative to these challenges could be found in floating offshore vertical axis wind turbines (VAWTs). It is known that VAWTs have certain advantages over HAWTs, and in fact, some small-scale developers have successfully commer

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Vanelli, T., J. Rinker, and D. S. Zalkind. "Aeroservoelastic stability of a floating wind turbine." Journal of Physics: Conference Series 2265, no. 4 (2022): 042001. http://dx.doi.org/10.1088/1742-6596/2265/4/042001.

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Abstract The problem of negative damping undermines the aeroservoelastic stability of floating offshore wind turbines. The negative damping problem is most prevalent around rated wind speed, where the sensitivity of thrust to wind speed is the largest. This paper investigates the implementation of peak shaving, a controller feature that limits the rated thrust by pitching the blades before rated wind speed is reached. Two controller designs are investigated: a de-tuned controller and a nacelle-feedback controller. A time-domain metric is defined, inspired by Lyapunov theory, in order to comput

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Ding, Hongyan, Zuntao Feng, Puyang Zhang, Conghuan Le, and Yaohua Guo. "Floating Performance of a Composite Bucket Foundation with an Offshore Wind Tower during Transportation." Energies 13, no. 4 (2020): 882. http://dx.doi.org/10.3390/en13040882.

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The composite bucket foundation (CBF) for offshore wind turbines is the basis for a one-step integrated transportation and installation technique, which can be adapted to the construction and development needs of offshore wind farms due to its special structural form. To transport and install bucket foundations together with the upper portion of offshore wind turbines, a non-self-propelled integrated transportation and installation vessel was designed. In this paper, as the first stage of applying the proposed one-step integrated construction technique, the floating behavior during the transpo

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Abdelmoteleb, Serag-Eldin, Alejandra S. Escalera Mendoza, Carlos R. dos Santos, Erin E. Bachynski-Polić, D. Todd Griffith, and Luca Oggiano. "Preliminary Sizing and Optimization of Semisubmersible Substructures for Future Generation Offshore Wind Turbines." Journal of Physics: Conference Series 2362, no. 1 (2022): 012001. http://dx.doi.org/10.1088/1742-6596/2362/1/012001.

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Several key development areas have been identified as having high potential for reducing the levelized cost of energy of offshore wind. Two of the most anticipated developments are future generation large wind turbines and the use of floating foundations. There is thus a need for developing large floating substructures that are capable of hosting future generation wind turbines. This work presents the preliminary sizing of two semi-submersible platforms for supporting a 25 MW turbine through a design space search using a simplified parametric analysis. Compared to simple theoretical upscaling,

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