TITLE

Quantifying the Impact of Wind Turbine Wakes on Power Output at Offshore Wind Farms

AUTHOR(S)
Barthelmie, R. J.; Pryor, S. C.; Frandsen, S. T.; Hansen, K. S.; Schepers, J. G.; Rados, K.; Schlez, W.; Neubert, A.; Jensen, L. E.; Neckelmann, S.
PUB. DATE
August 2010
SOURCE
Journal of Atmospheric & Oceanic Technology;Aug2010, Vol. 27 Issue 8, p1302
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
There is an urgent need to develop and optimize tools for designing large wind farm arrays for deployment offshore. This research is focused on improving the understanding of, and modeling of, wind turbine wakes in order to make more accurate power output predictions for large offshore wind farms. Detailed data ensembles of power losses due to wakes at the large wind farms at Nysted and Horns Rev are presented and analyzed. Differences in turbine spacing (10.5 versus 7 rotor diameters) are not differentiable in wake-related power losses from the two wind farms. This is partly due to the high variability in the data despite careful data screening. A number of ensemble averages are simulated with a range of wind farm and computational fluid dynamics models and compared to observed wake losses. All models were able to capture wake width to some degree, and some models also captured the decrease of power output moving through the wind farm. Root-mean-square errors indicate a generally better model performance for higher wind speeds (10 rather than 6 m s−1) and for direct down the row flow than for oblique angles. Despite this progress, wake modeling of large wind farms is still subject to an unacceptably high degree of uncertainty.
ACCESSION #
52934711

 

Related Articles

  • Numerical study on the effect of blade surface deterioration by erosion on the performance of a large wind turbine. Im, Heejeon; Kim, Bumsuk // Journal of Renewable & Sustainable Energy;Nov2019, Vol. 11 Issue 6, p1 

    As the demand for the development of onshore wind farms in areas with low wind speeds and large offshore wind farms increases, the size of the wind turbine and its rotor has also increased rapidly. An increase in the rotor diameter implies an increase in the relative wind velocity (with respect...

  • Comparison between Wind Farm Aggregation Techniques to Analyze Power System Dynamics. Atallah, Ahmed M.; Bayoumi, Mona A. // International Journal of Computer Applications;Feb2014, Vol. 88, p1 

    With increasing amount of wind power penetration, wind farms begin to influence the power systems. When a power system with many wind turbines is to be simulated, Wind farm aggregation techniques are required to reduce the model order while maintaining its accuracy. Different wind farm...

  • EXPERIMENTAL RESEARCH OF WIND TURBINE GENERATOR POWER CONTROL IN A HYBRID LABORATORY TEST BENCH. Puleva, Teofana; Rouzhekov, Georgi; Tyanov, Ivan; Peev, Dimiter // Advances in Bulgarian Science;2012, Vol. 1, p29 

    The paper describes the developed power control system for wind turbine generator based on a hybrid laboratory test bench. The structure and hardware configuration of the control system is represented. The mathematical model which describes the drive train and experimental determination of the...

  • A Suitable Load Control Method for Constant Tip Speed Ratio Operation of Stand-Alone Wind Turbine-Generator Systems. Wakui, Tetsuya; Yokoyama, Ryohei // Wind Engineering;Mar2008, Vol. 32 Issue 2, p143 

    A suitable load control method for constant tip speed ratio operation of a stand-alone system using a vertical axis wind turbine with self-starting capability is discussed. The system with a straight-wing-type turbine is mainly operated at a constant tip speed ratio. Two types of load control...

  • Impact of Wind Farm Output Fluctuation on Static Stability of Grid. Guang Yang; Bin Chen; Huilan Jiang; Shuangqi Zheng // Applied Mechanics & Materials;2014, Issue 672-674, p351 

    With the expanding of the scale of wind farm, wind farm's impact on power grid becomes more serious, which would cause a lot of problems. This paper mainly focuses on the static stability for the power grid containing wind farms. The static stability margins at different wind farm outputs are...

  • Assessment of Wind Atlas Analysis and Application Program and computational fluid dynamics estimates for power production on a Jeju Island wind farm. Beomcheol Ju; Jihyun Jeong; Kyungnam Ko // Wind Engineering;Feb2016, Vol. 40 Issue 1, p59 

    The accuracy of power production predictions made using a linear model, Wind Atlas Analysis and Application Program, and the computational fluid dynamics model, Meteodyn WT, was assessed for a Seongsan wind farm on Jeju Island, South Korea. The actual data on power production from 10 Vestas V80...

  • A Shrouded Wind Turbine Generating High Output Power with Wind-lens Technology. Ohya, Yuji; Karasudani, Takashi // Energies (19961073);Apr2010, Vol. 3 Issue 4, p634 

    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...

  • Weather hots up under the turbines. Ravilious, Kate // New Scientist;11/6/2004, Vol. 184 Issue 2472, p19 

    This article reports that wind farms can change the weather. According to a model of how these forests of giant turbines interact with the local atmosphere. Somnath Baidya Roy from Princeton University, and his colleagues modeled a hypothetical wind farm consisting of a 100 by 100 array of wind...

  • Evaluation of different inertial control methods for variable-speed wind turbines simulated by fatigue, aerodynamic, structures and turbulence (FAST). Xiao Wang; Wenzhong Gao; Scholbrock, Andrew; Muljadi, Eduard; Gevorgian, Vahan; Jianhui Wang; Weihang Yan; Huaguang Zhang // IET Renewable Power Generation;2017, Vol. 11 Issue 12, p1534 

    To mitigate the degraded power system inertia and undesirable primary frequency response caused by large-scale wind power integration, the frequency support capabilities of variable-speed wind turbines is studied in this work. This is made possible by controlled inertial response, which is...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics