Dynamic Model of Wind Speed Distribution in Wind Farm Considering the Impact of Wind Direction and Interference Effects

Abstract In order to accurately estimate wind farm output and subsequently optimise it, a method of wind speed distribution approximation is suggested. The method is based on period-by-period accumulation of wind speed measurements, transforming them into empirical probabilities, and observing the moving approximation to the expected power produced by the wind turbine or entire wind farm. A year is a minimal term during which wind statistics are to be accumulated. The sufficient validity and reliability of the wind speed distribution approximation is supported by controlling root -mean-square deviations and maximal absolute deviations with respect to the moving average of the expected power. The approximation quality can be regulated by adjusting constants defining the requirements to the moving deviations.

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The Equivalent Method of Wind Farms Considering Wake Effect

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.860-863.237 ◽

2013 ◽

Vol 860-863 ◽

pp. 237-241

Author(s):

Jing Ru Yan ◽

Jin Yao Zhu ◽

Xue Bing Zheng ◽

Ran Li

Keyword(s):

Wind Speed ◽

Energy Loss ◽

Wind Turbine ◽

Wind Farm ◽

Wind Farms ◽

Output Characteristic ◽

Wake Effect ◽

Speed Distribution ◽

Wind Speed Distribution ◽

Equivalent Method

It analyses the model of wake effect of wind farm in detail. Considering the energy loss caused by wake effect on the wind speed of wind turbine in different locations, the output of whole wind farm can be evaluated via the model, including the wind speed distribution. Then, it determines a kind of equivalent method of wind farm based on the output characteristic of the port of wind farm.

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Simulation of a large-scale wind farm consisting of series-connected wind generators when considering wind speed distribution

2017 20th International Conference on Electrical Machines and Systems (ICEMS) ◽

10.1109/icems.2017.8056227 ◽

2017 ◽

Author(s):

Shota Konomi ◽

Fujio Tatsuta ◽

Shoji Nishikata

Keyword(s):

Wind Speed ◽

Large Scale ◽

Wind Farm ◽

Speed Distribution ◽

Wind Generators ◽

Wind Speed Distribution

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Study of Combined Forecast Model of Wind Power Output Based on GM-Weibull Wind Speed Distribution

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.670-671.1566 ◽

2014 ◽

Vol 670-671 ◽

pp. 1566-1569

Author(s):

Yun Teng ◽

Qian Hui ◽

Xin Yu ◽

Zheng Liu ◽

Yong Gang Zhang

Keyword(s):

Wind Speed ◽

Weibull Distribution ◽

Wind Power ◽

Power Output ◽

Wind Farm ◽

Distribution Model ◽

Grey Theory ◽

Grey Prediction ◽

Speed Distribution ◽

Wind Speed Distribution

The grey theory is employed to establish the grey prediction-wind speed Weibull distribution model and calculate the Weibull distribution parameters according to the randomness and intermittence of the wind power output. The wind speed distribution of the wind farm and the effective wind power density are predicted accurately, the wind power and the electric fan efforts in generating capacity and other important data can be obtained according to the actual terrain wind farm wind speed data.

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Wind Direction Characteristics of a Vertical Axis Wind Turbine Using the Mechanism of a Bird’s Wing With a Wind Collector

ASME 2011 Power Conference, Volume 2 ◽

10.1115/power2011-55385 ◽

2011 ◽

Author(s):

Yoshiaki Tanzawa ◽

Takao Sato ◽

Takumi Hashizume

Keyword(s):

Computer Simulation ◽

Wind Speed ◽

Wind Tunnel ◽

Wind Turbine ◽

Wind Direction ◽

Vertical Axis ◽

Vertical Axis Wind Turbine ◽

Speed Distribution ◽

Wind Speed Distribution ◽

Savonius Wind Turbine

This paper describes the wind direction characteristics of the wind collector used for our 8th model of the vertical axis wind turbine using the mechanism of a bird’s wing. The 8th model is divided into two sections top and bottom. Each section looks like a Savonius wind turbine. The blade is divided into seven rows of plates. Each 0.18mm stainless plate has only one side attached to the frame. Wind from the outside enlarges the space between the blades, and passes through. However, wind from the inside closes the space. In the wind collector, four wind collection boards are located every 90 degrees around this wind turbine. In an earlier paper, it was confirmed that these collection boards collected 1.6 times the wind and resulted in twice the output. In this paper, the variations in the wind collector characteristics due to the wind direction are clarified experimentally. A wind tunnel experiment using six different wind directions shows that the output increases for four wind directions and decreases for one wind direction. Additionally, the computer simulation confirms the wind direction and the wind speed distribution around the wind turbine when the wind collection boards are in place.

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THE IMPACT OF LONG CANYON DESIGN AND WATERFRONT BARRIER BUILDINGS ON WIND VELOCITY IN A COASTAL AREA OF SELATPANJANG CITY

Arsitektura ◽

10.20961/arst.v16i2.22778 ◽

2018 ◽

Vol 16 (2) ◽

pp. 231 ◽

Cited By ~ 1

Author(s):

Boby Rahman ◽

Asri Dinapradipta ◽

Ima Defiana

Keyword(s):

Wind Speed ◽

Urban Environments ◽

Average Wind Speed ◽

Speed Reduction ◽

Speed Distribution ◽

Average Wind ◽

Wind Speed Distribution ◽

Urban Waterfront ◽

Wind Distribution ◽

The Impact

The increase of waterfront buildings’ height has an effect on wind distribution in the urban canyon. On the other hand, the distribution of wind is needed in providing thermal balance in urban environments, especially in urban waterfront coastal areas. This study aimed at observing and analyzing the effect of building height (H) on waterfront buildings and aspects of the length to width (L/W) ratio related to the length of the canyon design. The observation was focused on the wind speed distribution. The research was an experimental research using ENVI-met V3.1 software for simulation. The results indicated that short canyon (low L/W value) results in lower wind speed changes compared to that of long one (higher L/W value) at all altitude levels. The short canyons provided more stability in wind speed reduction. The 15 meters wide of canyon design contributed to the highest average wind speed. Overall, the existence of a barrier building would result in a negative area of air flow and create a calm area within the distance of ± 50 meters.

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