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A Shrouded Wind Turbine Generating High Output Power with Wind-lens Technology
Ohya, Yuji; Karasudani, Takashi - In: Energies 3 (2010) 4, pp. 634-649
We have developed a new wind turbine system that consists of a diffuser shroud with a broad-ring brim at the exit … periphery and a wind turbine inside it. The shrouded wind turbine with a brimmed diffuser has demonstrated power augmentation by … inside the diffuser shroud. …
Persistent link: https://www.econbiz.de/10010668075
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Behavior of the Blade Tip Vortices of a Wind Turbine Equipped with a Brimmed-Diffuser Shroud
Takahashi, Shuhei; Hata, Yuya; Ohya, Yuji; Karasudani, … - In: Energies 5 (2012) 12, pp. 5229-5242
To clarify the behavior of the blade tip vortices of a wind turbine equipped with a brimmed-diffuser shroud, called a … unique wind turbine consists of not only rotating blades but also a diffuser shroud with a broad-ring brim at the exit … the blade tip and the inner surface of the diffuser. Since these vortices interacted with each other, the blade tip vortex …
Persistent link: https://www.econbiz.de/10011031181
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Reliability Analysis of Fatigue Failure of Cast Components for Wind Turbines
Rafsanjani, Hesam Mirzaei; Sørensen, John Dalsgaard - In: Energies 8 (2015) 4, pp. 2908-2923
Fatigue failure is one of the main failure modes for wind turbine drivetrain components made of cast iron. The wind turbine drivetrain consists of a variety of heavily loaded components, like the main shaft, the main bearings, the gearbox and the generator. The failure of each component will...
Persistent link: https://www.econbiz.de/10011255355
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Condition Parameter Modeling for Anomaly Detection in Wind Turbines
Yan, Yonglong; Li, Jian; Gao, David Wenzhong - In: Energies 7 (2014) 5, pp. 3104-3120
Data collected from the supervisory control and data acquisition (SCADA) system, used widely in wind farms to obtain operational and condition information about wind turbines (WTs), is of important significance for anomaly detection in wind turbines. The paper presents a novel model for wind...
Persistent link: https://www.econbiz.de/10010765423
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Wind Turbine Blade Design
Schubel, Peter J.; Crossley, Richard J. - In: Energies 5 (2012) 9, pp. 3425-3449
A detailed review of the current state-of-art for wind turbine blade design is presented, including theoretical maximum efficiency, propulsion, practical efficiency, HAWT blade design, and blade loads. The review provides a complete picture of wind turbine blade design and shows the dominance of...
Persistent link: https://www.econbiz.de/10010668058
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Review of DC System Technologies for Large Scale Integration of Wind Energy Systems with Electricity Grids
Shao, Sheng Jie; Agelidis, Vassilios G. - In: Energies 3 (2010) 6, pp. 1303-1319
The ever increasing development and availability of power electronic systems is the underpinning technology that enables large scale integration of wind generation plants with the electricity grid. As the size and power capacity of the wind turbine continues to increase, so is the need to place...
Persistent link: https://www.econbiz.de/10010668190
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A Closed-Form Technique for the Reliability and Risk Assessment of Wind Turbine Systems
Mensah, Akwasi F.; Dueñas-Osorio, Leonardo - In: Energies 5 (2012) 6, pp. 1734-1750
This paper proposes a closed-form method to evaluate wind turbine system reliability and associated failure consequences. Monte Carlo simulation, a widely used approach for system reliability assessment, usually requires large numbers of computational experiments, while existing analytical...
Persistent link: https://www.econbiz.de/10011030768
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Illustration of Modern Wind Turbine Ancillary Services
Margaris, Ioannis D.; Hansen, Anca D.; Sørensen, Poul; … - In: Energies 3 (2010) 6, pp. 1290-1302
Increasing levels of wind power penetration in modern power systems has set intensively high standards with respect to wind turbine technology during the last years. Security issues have become rather critical and operation of wind farms as conventional power plants is becoming a necessity as...
Persistent link: https://www.econbiz.de/10011030824
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Communication Network Architectures for Smart-Wind Power Farms
Ahmed, Mohamed A.; Kim, Young-Chon - In: Energies 7 (2014) 6, pp. 3900-3921
Developments in the wind power industry have enabled a new generation of wind turbines with longer blades, taller towers, higher efficiency, and lower maintenance costs due to the maturity of related technologies. Nevertheless, wind turbines are still blind machines because the control center is...
Persistent link: https://www.econbiz.de/10011030898
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Fatigue Reliability and Calibration of Fatigue Design Factors for Offshore Wind Turbines
Márquez-Domínguez, Sergio; Sørensen, John D. - In: Energies 5 (2012) 6, pp. 1816-1834
Consequences of failure of offshore wind turbines (OWTs) is in general lower than consequences of failure of, e.g., oil & gas platforms. It is reasonable that lower fatigue design factors can be applied for fatigue design of OWTs when compared to other fixed offshore structures. Calibration of...
Persistent link: https://www.econbiz.de/10011030928