scholarly journals Floating State of a One-Step Integrated Transportation Vessel with Two Composite Bucket Foundations and Offshore Wind Turbines

2019 ◽  
Vol 7 (8) ◽  
pp. 263 ◽  
Author(s):  
Puyang Zhang ◽  
Disheng Liang ◽  
Hongyan Ding ◽  
Conghuan Le ◽  
Xing Zhao
Keyword(s):  
Wind Turbine ◽  
Wind Power ◽  
Wave Height ◽  
New Technology ◽  
Offshore Wind ◽  
Offshore Wind Power ◽  
One Step ◽  
Set Up ◽  
The One ◽  
Installation Technology

Offshore wind power is an important of source renewable energy. As a new technology, the one-step integrated transportation and installation technology of offshore wind power has broader application prospects. In order to ensure stability during the towing process, it is necessary to study the behavior of the wind turbine transportation structure. The numerical model of the specialized transportation vessel was set up by MOSES software. An analysis in the frequency domain and time domain was conducted considering the effects of draft, speed, and wave height on the towing stability of the wind turbine transportation vessel. The results show that the one-step integrated transportation method can ensure stability of the wind turbine during the towing process. Reducing draft, increasing speed, and increasing wave height will reduce the towing stability of the wind turbine. In the practical towing process, the combination of various adverse situations will be avoided.

scholarly journals Long-term changes in offshore wind power density and wind turbine capacity factor in the Iberian Peninsula (1900–2010)

Energy ◽  
2021 ◽  
Vol 226 ◽  
pp. 120364
Author(s):  
Sheila Carreno-Madinabeitia ◽  
Gabriel Ibarra-Berastegi ◽  
Jon Sáenz ◽  
Alain Ulazia
Keyword(s):  
Wind Turbine ◽  
Iberian Peninsula ◽  
Wind Power ◽  
Power Density ◽  
Capacity Factor ◽  
Offshore Wind ◽  
Offshore Wind Power ◽  
Long Term Changes ◽  
Turbine Capacity

scholarly journals Reliability Analysis on One-Step Overall Transportation of Composite Bucket Foundation for Offshore Wind Turbine

Energies ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 23
Author(s):  
Jijian Lian ◽  
Pengwen Wang ◽  
Conghuan Le ◽  
Xiaofeng Dong ◽  
Xu Yang ◽  
...  
Keyword(s):  
Theoretical Calculations ◽  
Wind Farms ◽  
Frequency Domain Analysis ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Observation Data ◽  
Offshore Wind Farms ◽  
One Step ◽  
The One ◽  
Installation Technology

Composite bucket foundations, which have been successfully transported, installed, and operated at the Qidong, Xiangshui, and Dafeng offshore wind farms in China, are economically advantageous due to the relatively simple transportation and installation process. The innovative one-step transportation and installation technology of foundation-tower-nacelle is the key phase in saving costs. In this paper, a “foundation lift ship” overall transport mode is proposed and introduced for the first time. Prototype data measurement, preliminary numerical simulation, and theoretical calculations were conducted to investigate whether the foundation-ship integrity, tower hoop stability, and various indexes of the nacelle met the requirements under the influences of various environmental factors. The multi-system coupling motion mechanism and analysis method of this new structure and transportation mode were expounded. Through the prototype observation data of the one-step overall transportation, the ship-foundation system reliability of the structure in the case of large wind and wave was confirmed. Furthermore, it was found that in the one-step overall transportation, the importance of factors to nacelle acceleration decreased in the order of wave height, current speed, and wind speed by the time and frequency domain analysis and data statistics.

Model Test of Integrated Floating Transport Technology of Offshore Wind Turbines With Composite Bucket Foundation

2018 ◽  
Author(s):  
Hongyan Ding ◽  
Lingqian Meng ◽  
Puyang Zhang ◽  
Conghuan Le
Keyword(s):  
Wind Turbine ◽  
Contact Force ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Bucket Foundation ◽  
Offshore Wind Turbines ◽  
Continuous Innovation ◽  
One Step ◽  
The One ◽  
The Relationship

With continuous innovation and development of the wind power technology, the offshore wind turbine is rapidly developing. However, it also has difficulties in construction at sea and other shortcomings. One-step installation technique of the composite bucket foundation (CBF) provides a new way to solve the difficulties in the construction of offshore wind turbine at sea. And the integrated floating transport technique of the offshore CBF is the key link in the one-step installation technique. In this paper, by controlling three factors, such as draft, wave height and speed, the contact force between the vessel and CBF in the integrated floating transportation process is studied with experimental method. The relationship and the effect between the three factors and the contact force is analyzed. The experimental results are collected and analyzed to verify the safety of the integrated floating transportation of offshore CBF.

An offshore hydraulic wind turbine generator with variable-diameter rotor: Design, modeling and experiment

2016 ◽  
Vol 231 (2) ◽  
pp. 521-532 ◽  
Author(s):  
Weixing Chen ◽  
Feng Gao ◽  
Xiangdun Meng ◽  
Anye Ren ◽  
Songlin Zhou
Keyword(s):  
Energy Conversion ◽  
Wind Turbine ◽  
Wind Power ◽  
Offshore Wind ◽  
Speed Ratio ◽  
Turbine Generator ◽  
Recovery Method ◽  
Offshore Wind Power ◽  
Wind Turbine Generator ◽  
Variable Diameter

Offshore wind power is more abundant and stronger than the onshore, and more and more research enthusiasms have been raised in recent years. However, there are still many issues in the utilization of the offshore wind power such as the cost of installations and maintenance and the ability to resist extreme weather conditions. In this article, an offshore hydraulic wind turbine generator with variable-diameter rotor is presented. The diameter of the rotor can be regulated according to the wind speeds to achieve the maximum power coefficient. The hydraulic energy working as the transmission medium can improve the output power quality. The high-speed gearbox is removed, and the generator is installed on the platform, which facilitates the installations and maintenance. Here, the power conversion principle of the wind turbine generator was introduced first. Then, the dynamics and performance of the wind turbine generator was obtained. The relationship between the diameter of the rotor and the wind speed was established according to the dynamics and the optimum tip-speed ratio. Relying on the specific parameters, the dynamic response was calculated in Simulink. The results show that the instantaneous output of the wind turbine generator is relatively stable. Based on the power recovery method, the test platform was built, and the efficiency of the energy conversion device was tested. The experimental results demonstrate that the efficiency of the energy conversion device can be 88%. Finally, the total efficiency of the offshore hydraulic wind turbine generator was predicted to be 33.7%.

scholarly journals Floating offshore wind turbines - technology and potential

2020 ◽  
Vol 43 ◽  
pp. 89-94
Author(s):  
Aurel Dan Maimon
Keyword(s):  
Wind Power ◽  
Wind Turbines ◽  
Production Efficiency ◽  
Short Review ◽  
Offshore Wind ◽  
Offshore Wind Power ◽  
Offshore Wind Turbines ◽  
Floating Offshore Wind Turbines ◽  
Visual Impact ◽  
The One

"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 ashore for heavy maintenance or final dismantling. Floating wind power is the future of offshore wind power."

Study on the Coexistence of Offshore Wind Farms and Cage Culture

Water ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 1960
Author(s):  
Hsing-Yu Wang ◽  
Hui-Ming Fang ◽  
Yun-Chih Chiang
Keyword(s):  
Wind Turbine ◽  
Wind Power ◽  
Wind Farm ◽  
Wind Farms ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Offshore Wind Farms ◽  
Offshore Wind Power ◽  
Waves And Currents ◽  
The Waves

In this study, a hydrodynamic model was used that includes the effects of wave–current interactions to simulate the wave and current patterns before and after offshore wind turbine installation in western Taiwan. By simulating the waves and currents after the offshore wind turbine was established, the waves and currents caused by the wind turbine were seen to have a limited range of influence, which is probably within an area about four to five times the size of the diameter (12–15 m) of the foundation structure. Overall, the analysis of the simulation results of the wave and current patterns after the offshore wind turbines were established shows that the underwater foundation only affected the local area near the pile structure. The wind farm (code E) of the research case can be equipped with about 720 cage cultures; if this is extended to other wind farms in the western sea area, it should be possible to produce economic-scale farming operations such as offshore wind power and fisheries. However, this study did not consider the future operation of the entire offshore wind farm. If the operation and maintenance of offshore wind farms are not affected, and if the consent of the developer is obtained, it should be possible to use this method to provide economically large-scale farming areas as a mutually beneficial method for offshore wind power generation and fisheries.

scholarly journals Wind Turbine Oriented Solutions to Improve Power Quality and Harmonic Compliance of AC Offshore Wind Power Plants

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Carlos Ruiz ◽  
Gonzalo Abad ◽  
Markel Zubiaga ◽  
Danel Madariaga ◽  
Joseba Arza
Keyword(s):  
Wind Turbine ◽  
Wind Power ◽  
Power Quality ◽  
Power Plants ◽  
Offshore Wind ◽  
Offshore Wind Power ◽  
Wind Power Plants

scholarly journals Health Monitoring and Safety Evaluation of the Offshore Wind Turbine Structure: A Review and Discussion of Future Development

2019 ◽  
Vol 11 (2) ◽  
pp. 494 ◽  
Author(s):  
Jijian Lian ◽  
Ou Cai ◽  
Xiaofeng Dong ◽  
Qi Jiang ◽  
Yue Zhao
Keyword(s):  
Wind Turbine ◽  
Wind Power ◽  
Health Monitoring ◽  
Safety Evaluation ◽  
Development Trend ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Offshore Wind Power ◽  
Health Monitoring Systems ◽  
Evaluation Techniques

With the depletion of fossil energy, offshore wind power has become an irreplaceable energy source for most countries in the world. In recent years, offshore wind power generation has presented the gradual development trend of larger capacity, taller towers, and longer blades. The more flexible towers and blades have led to the structural operational safety of the offshore wind turbine (OWT) receiving increasing worldwide attention. From this perspective, health monitoring systems and operational safety evaluation techniques of the offshore wind turbine structure, including the monitoring system category, data acquisition and transmission, feature information extraction and identification, safety evaluation and reliability analysis, and the intelligent operation and maintenance, were systematically investigated and summarized in this paper. Furthermore, a review of the current status, advantages, disadvantages, and the future development trend of existing systems and techniques was also carried out. Particularly, the offshore wind power industry will continue to develop into deep ocean areas in the next 30 years in China. Practical and reliable health monitoring systems and safety evaluation techniques are increasingly critical for offshore wind farms. Simultaneously, they have great significance for strengthening operation management, making efficient decisions, and reducing failure risks, and are also the key link in ensuring safe energy compositions and achieving energy development targets in China. The aims of this article are to inform more scholars and experts about the status of the health monitoring and safety evaluation of the offshore wind turbine structure, and to contribute toward improving the efficiency of the corresponding systems and techniques.

Resonance damping in array cable systems by wind turbine active filtering in large offshore wind power plants

2017 ◽  
Vol 11 (7) ◽  
pp. 1069-1077 ◽  
Author(s):  
Łukasz Hubert Kocewiak ◽  
Birte Laudal Øhlenschlæger Kramer ◽  
Ole Holmstrøm ◽  
Kim Høj Jensen ◽  
Lei Shuai
Keyword(s):  
Wind Turbine ◽  
Wind Power ◽  
Power Plants ◽  
Offshore Wind ◽  
Offshore Wind Power ◽  
Wind Power Plants ◽  
Cable Systems ◽  
Resonance Damping ◽  
Active Filtering
Sign in / Sign up

Export Citation Format

Share Document