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1. Theoretical mathematic wake model and its application in reducing energy assessment | |||
GE Litao,UCHIDA Takanori,OHYA Yuji | |||
Energy Science and Technology 21 October 2014 | |||
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Abstract:Currently, most commercial wind power software are using mathematic wake model for the energy assessment and optimizing the layout of the wind farm. I proposed a new mathematics wake model theoretically based on Theorem of Momentum combined with Actuator Disk Model. This model can calculate the velocity profile of the cross section of the wake not only average results. Two special cases are considered. one is the velocity reduction more than 30% which makes the theorem of momentum invalid. The other is the case of the lateral wind turbine impact. The intermittency of wind power production is analyzed in the research and the new make model applications are highlight. | |||
TO cite this article:GE Litao,UCHIDA Takanori,OHYA Yuji. Theoretical mathematic wake model and its application in reducing energy assessment[OL].[21 October 2014] http://en.paper.edu.cn/en_releasepaper/content/4614133 |
2. Numerical Simulation of Wake and Array of Double Wind Turbine | |||
YANG Rui,XIA Weiwei,ZHANG Shenglong,WANG Jiuxin,XU Shihai | |||
Energy Science and Technology 01 March 2014 | |||
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Abstract:In order to use the wind resources reasonable and reduce the wake effects on wind turbine performance.The aerodynamic interaction between two turbines in both co-axial and stagger arrangement was simulated using the Fluent.Putting forward suggestions to the optimization of wind farm layout.The results show that downstream turbine makes the upstream diverging wake to be convergence when co-axial wind conditions, and the output of downstream turbine is affected by upstream wake when the spacing is less than 5D.The wake field become more diffused after pass the downstream turbine ,and the area of diverging wake become larger than the wake of upstream turbine mainly due to the increase of turbulence intensity. The greater fatigue load impact on the downstream turbine .Due to flow field were extruding by the wake effect of the reference turbine when stagger arrangement wind conditions,the interface of wake has a complex velocity field. | |||
TO cite this article:YANG Rui,XIA Weiwei,ZHANG Shenglong, et al. Numerical Simulation of Wake and Array of Double Wind Turbine[OL].[ 1 March 2014] http://en.paper.edu.cn/en_releasepaper/content/4587922 |
3. A study for low-cost small power wind turbine systems | |||
DAI Ping,SHI Weifeng,CHEN Jieshi | |||
Energy Science and Technology 26 February 2013 | |||
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Abstract:This paper presents a new control algorithm for low-cost small power wind turbine systems with topology which consists of wind turbine, directly coupled permanent synchronous generator, rectifier, boost circuit and resistive load. The system structure and characteristics are studied and analyzed in the paper. The control strategy for generator side converter is based on extracting the maximum mechanical power from the wind turbine and sliding mode control for boost circuits. Simulation results validate and confirm the effectiveness of the proposed control algorithm. | |||
TO cite this article:DAI Ping,SHI Weifeng,CHEN Jieshi. A study for low-cost small power wind turbine systems[OL].[26 February 2013] http://en.paper.edu.cn/en_releasepaper/content/4521564 |
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