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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
>FDF</em>) for steel substructures for OWTs is the scope of this paper. A reliability-based approach is used and a probabilistic … acceptable reliability level for fatigue failure of OWTs is discussed and results are presented for calibrated optimal fatigue …
Persistent link: https://www.econbiz.de/10011030928
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Probabilistic Design of Wind Turbines
Sørensen, John D.; Toft, Henrik S. - In: Energies 3 (2010) 2, pp. 241-257
uncertain parameters; recommendations for target reliability levels and recommendation for consideration of system aspects. The …). Methods for uncertainty modeling consistent with methods for estimating the reliability are described. It is described how …. Assessment of the optimal reliability level by cost-benefit optimization is illustrated by an offshore wind turbine example …
Persistent link: https://www.econbiz.de/10011031288
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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
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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
role in modeling and assessment of the reliability of the components. In this paper, a generic stochastic model for fatigue … reliability analyses depending on various stochastic models and partial safety factors. …
Persistent link: https://www.econbiz.de/10011255355
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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
-effective fault diagnostic techniques, design for reliability and premature failure prevention. Starting from an analysis of the DFIG …
Persistent link: https://www.econbiz.de/10011265956
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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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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 a factor of about 2–5 compared with a bare wind...
Persistent link: https://www.econbiz.de/10010668075
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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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Harmonic Current Predictors for Wind Turbines
Teng, Jen-Hao; Leou, Rong-Ceng; Chang, Chuo-Yean; Chan, … - In: Energies 6 (2013) 3, pp. 1314-1328
The harmonic impact caused by wind turbines should be carefully investigated before wind turbines are interconnected. However, the harmonic currents of wind turbines are not easily predicted due to the variations of wind speed. If the harmonic current outputs can be predicted accurately, the...
Persistent link: https://www.econbiz.de/10010675996
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Electromagnetic Interference on Large Wind Turbines
Krug, Florian; Lewke, Bastian - In: Energies 2 (2009) 4, pp. 1118-1129
Electromagnetic interference (EMI) can both affect and be transmitted by mega-watt wind turbines. This paper provides a general overview on EMI with respect to mega-watt wind turbines. Possibilities of measuring all types of electromagnetic interference are shown. Electromagnetic fields...
Persistent link: https://www.econbiz.de/10010676010