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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

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

An Electro-Thermal Analysis of a Variable-Speed Doubly-Fed Induction Generator in a Wind Turbine

Qiu, Yingning; Zhang, Wenxiu; Cao, Mengnan; Feng, Yanhui; … - In: Energies 8 (2015) 5, pp. 3386-3402

This paper focuses on the electro-thermal analysis of a doubly-fed induction generator (DFIG) in a wind turbine (WT) with gear transmission configuration. The study of the thermal mechanism plays an important role in the development of cost-effective fault diagnostic techniques, design for...

Persistent link: https://www.econbiz.de/10011265956

System Integration of the Horizontal-Axis Wind Turbine: The Design of Turbine Blades with an Axial-Flux Permanent Magnet Generator

Bai, Chi-Jeng; Wang, Wei-Cheng; Chen, Po-Wei; Chong, … - In: Energies 7 (2014) 11, pp. 7773-7793

In designing a horizontal-axis wind turbine (HAWT) blade, system integration between the blade design and the performance test of the generator is important. This study shows the aerodynamic design of a HAWT blade operating with an axial-flux permanent magnet (AFPM) generator. An experimental...

Persistent link: https://www.econbiz.de/10011078509

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

Implications of Stably Stratified Atmospheric Boundary Layer Turbulence on the Near-Wake Structure of Wind Turbines

Bhaganagar, Kiran; Debnath, Mithu - In: Energies 7 (2014) 9, pp. 5740-5763

Turbulence structure in the wake behind a full-scale horizontal-axis wind turbine under the influence of real-time atmospheric inflow conditions has been investigated using actuator-line-model based large-eddy-simulations. Precursor atmospheric boundary layer (ABL) simulations have been...

Persistent link: https://www.econbiz.de/10010945722

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

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

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

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