Estimation of annual energy output of a wind turbine using wind speed probability distribution

2016 ◽  
Author(s):  
K. M. S. Y. Konara ◽  
H. G. Beyer ◽  
M. L. Kolhe
Keyword(s):  
Wind Speed ◽  
Probability Distribution ◽  
Wind Turbine ◽  
Energy Output

scholarly journals Evaluation of Energy in Wind Turbine System Using Probability Distribution

2018 ◽  
Vol 9 (2) ◽  
pp. 294
Author(s):  
Kalyan Sagar Kadali ◽  
L Rajaji
Keyword(s):  
Distribution Function ◽  
Wind Speed ◽  
Probability Distribution ◽  
Wind Turbine ◽  
Torque Control ◽  
Energy Output ◽  
Power Coefficient ◽  
Speed Ratio ◽  
Wind Turbine System ◽  
Mean Wind Speed

In this work, annual energy output of a variable speed wind turbine is analyzed using annual Weibull wind speed probability distribution function. The power coefficient variety with tip speed proportion in torque control district and pitch point variety for most extreme power yield from wind turbine are examined for distinguishing control framework parameters. The wind turbine power output and variation of power coefficient with tip speed ratio as well as pitch angle are examined / reported using annual Wei bull distribution function. Finally the variation of the estimated annual energy output of the given wind turbine with the mean wind speed is presented.

Interannual Wind Speed Variations and Estimated Wind Turbine Generator Energy Output at Selected Sites in the Pacific Northwest

1985 ◽  
Vol 107 (3) ◽  
pp. 237-239
Author(s):  
R. W. Baker
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
Pacific Northwest ◽  
Power Measurement ◽  
Energy Output ◽  
Turbine Generator ◽  
Wind Turbine Generator ◽  
Speed Variation ◽  
Percent Increase ◽  
The Mean

The hourly wind speed data collected over a six-year period at four wind power measurement locations are used to estimate the annual energy output of a large wind turbine generator. The interannual energy and wind speed variations are discussed. The estimated interannual energy output at each location is related to the mean annual wind speed variation. The data indicate that at three of the four locations the estimated interannual energy variation varied as the square of the mean annual wind speed variation. That is, a 10 percent increase in the mean annual wind speed resulted in a 20 percent increase in the annual energy output. At the fourth location there was an approximate linear relationship.

scholarly journals Reliability Estimation of Parameters of Helical Wind Turbine with Vertical Axis

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Adela-Eliza Dumitrascu ◽  
Badea Lepadatescu ◽  
Dorin-Ion Dumitrascu ◽  
Anisor Nedelcu ◽  
Doina Valentina Ciobanu
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
High Reliability ◽  
Operating Time ◽  
Vertical Axis ◽  
Reliability Estimation ◽  
Cumulative Distribution ◽  
Energy Output ◽  
Vertical Axis Wind Turbine ◽  
Estimation Of Parameters

Due to the prolonged use of wind turbines they must be characterized by high reliability. This can be achieved through a rigorous design, appropriate simulation and testing, and proper construction. The reliability prediction and analysis of these systems will lead to identifying the critical components, increasing the operating time, minimizing failure rate, and minimizing maintenance costs. To estimate the produced energy by the wind turbine, an evaluation approach based on the Monte Carlo simulation model is developed which enables us to estimate the probability of minimum and maximum parameters. In our simulation process we used triangular distributions. The analysis of simulation results has been focused on the interpretation of the relative frequency histograms and cumulative distribution curve (ogive diagram), which indicates the probability of obtaining the daily or annual energy output depending on wind speed. The experimental researches consist in estimation of the reliability and unreliability functions and hazard rate of the helical vertical axis wind turbine designed and patented to climatic conditions for Romanian regions. Also, the variation of power produced for different wind speeds, the Weibull distribution of wind probability, and the power generated were determined. The analysis of experimental results indicates that this type of wind turbine is efficient at low wind speed.

Evaluation of the Power Output of a Wind Turbine With a Brimmed Diffuser Shroud in Fluctuating Flows

2007 ◽  
Author(s):  
S. Roberto Gonzalez A. ◽  
Yuji Ohya ◽  
Takashi Karasudani ◽  
Shusaku Iba ◽  
Kimihiko Watanabe
Keyword(s):  
Wind Speed ◽  
Power Plant ◽  
Wind Energy ◽  
Wind Turbine ◽  
Power Output ◽  
Alternative Energy ◽  
Fossil Fuels ◽  
Research Work ◽  
Energy Output ◽  
The World

Fossil fuels have been used extensively all over the world to satisfy energy demands. However, their availability is limited and their negative impact on the environment undeniable. Due to this, the need to develop alternative energy resources was recognized a few decades ago. Among different alternatives that have been developed, wind energy appears as a promising option to be implemented in many parts of the world. Nonetheless, its development and the cost per kW are still higher than that from fossil fuels. The intermittence of its capability to produce energy and the size of the wind power plant (as compared to a coal or nuclear power plant of the same energy output) have not made its implementation easier. In order to make wind energy more competitive and attractive to investors, new energy systems are desired. Specifically, it is desired to have a higher energy output. In this study a brimmed-diffuser shroud was incorporated into a 1 kW wind turbine. The turbine was then evaluated under fluctuating wind conditions. The experiments were conducted at the large boundary wind tunnel of Kyushu University. It is shown that power output increases for a fluctuating flow as opposed to a steady flow. The turbine power output is capable of following the changes in the wind speed accurately in the range of wind speed fluctuations tested. This is shown by correlation analysis and supported by the frequency spectrum. This study is part of a larger research work aimed at evaluating a novel wind turbine design. The current results are very encouraging. Possible wind sites of wind speed average lower than the current minimum accepted values can be exploited by using a turbine like the one evaluated in this work.

scholarly journals Economic Analysis of Wind Turbine Installation in Taiwan

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Jeeng-Min Ling ◽  
Kunkerati Lublertlop
Keyword(s):  
Wind Speed ◽  
Wind Energy ◽  
Wind Turbine ◽  
Capacity Factor ◽  
Energy Output ◽  
Energy Potential ◽  
Successful Operation ◽  
Average Wind Speed ◽  
Hourly Data ◽  
Turbine Installation

The wind speed characteristics are analyzed statistically based on a long-term hourly data record to evaluate the proper wind energy potential. The annual average wind speed and wind power density are investigated and compared by some significant indices, wind energy output and capacity factor, to show the variations of proper wind turbine specifications of installation in different locations of Taiwan. The minimum cost of wind energy is used to assess the economical feasibility for turbine installation in Taiwan. Great variations occur in the simulation results in both of the cost of energy and capacity factor. The detailed statistical analysis should be conducted to ensure the successful operation after wind turbine installations.

scholarly journals Influence of wind energy utilization potential in urban suburbs: a case study of Hohhot

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Wang Wenxin ◽  
Chen Kexin ◽  
Bai Yang ◽  
Xu Yun ◽  
Wang Jianwen
Keyword(s):  
Wind Speed ◽  
Wind Energy ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Vertical Axis ◽  
Statistical Properties ◽  
Energy Utilization ◽  
Energy Output ◽  
Distribution Model ◽  
Horizontal Axis Wind Turbine

AbstractGiven the increasing trend of using wind energy in cities, the utilization of distributed wind energy in cities has been widely concerned by researchers. The related research on the micro-site selection of wind turbines, a sub-project of the Task27 project of the International energy agency, was continued in this paper. The wind speed data of an observation station near Hohhot, Inner Mongolia, with a range of 10–19 m were collected. The evaluation included wind direction, Weibull parameter characteristics, and turbulence intensity. The potential energy output in 10 different heights was estimated using commercial horizontal and vertical axis wind turbines of the same power. Results showed that the following: the three-parameter Weibull distribution model can well describe the statistical properties of the wind speed in this site. The wind speed distribution model constructed from extrapolation parameters reflects the wind speed statistical properties out of detection positions to a certain extent. The wind energy density of the vertical axis wind turbine is slightly lower than that of the horizontal axis wind turbine. Furthermore, more power can be generated from March to May.

Site Characterization and the Aerodynamics of an Offshore Wind Power Plant: Statistical, Numerical and Analytical Approaches

2016 ◽  
Author(s):  
J. Agbormbai ◽  
M. Yu ◽  
W. D. Zhu
Keyword(s):  
Wind Speed ◽  
Probability Distribution ◽  
Wind Energy ◽  
Wind Turbine ◽  
Wind Power ◽  
Historical Data ◽  
Average Wind ◽  
Error Bars ◽  
Wind Resources ◽  
Blade Element

Prior to choosing a site for a wind farm, its wind resources must be known. On-site measurement of wind speed, using an anemometer or any other appropriate measuring device or the use of historical meteorological data for the site (if they exist) enhance the knowledge of the site’s wind resources. Typically, the use of 50-year historical data is recommended by Wind Energy Engineering Standards. For the offshore site in study, only the 24-year historical data from the National Oceanic and Atmospheric Administration (NOAA) data base is available. Wind speed determined from NOAA’s error bars is used to plot Rayleigh probability distribution curves for each month of the year, based on the operational limit of the 5MW NREL reference wind turbine. The site’s average wind speed and gust are determined based on average wind energy capture. A Gumbel probability distribution curve is plotted based on the operational range of the wind turbine in study, using NOAA’s error bars for the 24year historical hourly wind gust for the site. This study uses the estimated mean wind speed and mean gust, to implement BEMT simulations to investigate the aerodynamic forces caused by the wind or gust on the blades of the HAWT rotor. The wind power captured and the power coefficient are estimated for each scenario. Empirical formulae are developed for the estimation of the rotor blade airfoil’s chord length in terms of blade element radius and the axial induction factor for each scenario, in terms of blade element radius.

scholarly journals Influence of Wind Energy Utilization Potential in Urban Suburbs: A Case Study of Hohhot

2020 ◽  
Author(s):  
wang Wenxin ◽  
Bai Yang ◽  
Chen Kexin ◽  
Wang Jianwen ◽  
Qin Chaofan
Keyword(s):  
Wind Speed ◽  
Wind Energy ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Vertical Axis ◽  
Statistical Properties ◽  
Energy Utilization ◽  
Energy Output ◽  
Distribution Model ◽  
Horizontal Axis Wind Turbine

Abstract Background：Given the increasing trend of using wind energy in cities, the utilization of distributed wind energy in cities has been widely concerned by researchers. The related research on the micro-site selection of wind turbines, a sub-project of the Task27 project of the International energy agency, was continued in this paper.Methods：The wind speed data of an observation station near Hohhot, Inner Mongolia, with a range of 10-19 m were collected. The evaluation included wind direction, Weibull parameter characteristics, and turbulence intensity. The potential energy output in 10 different heights was estimated using commercial horizontal and vertical axis wind turbines of the same power.Results：The three-parameter Weibull distribution model can well describe the statistical properties of the wind speed in this site. The wind speed distribution model constructed from extrapolation parameters reflects the wind speed statistical properties out of detection positions to a certain extent.Conclusions：The wind energy density of the vertical axis wind turbine is slightly lower than that of the horizontal axis wind turbine. Furthermore, more power can be generated from March to May.

Continuous Variable Speed Wind Turbine: Transmission Concept and Robust Control

2000 ◽  
Vol 24 (3) ◽  
pp. 151-167 ◽  
Author(s):  
Moshe Idan ◽  
David Lior
Keyword(s):  
Control System ◽  
Robust Control ◽  
Wind Speed ◽  
Wind Turbine ◽  
Power Output ◽  
Energy Output ◽  
Variable Speed ◽  
Efficient Operation ◽  
Variable Speed Wind Turbine ◽  
Wide Range

This paper presents the theory and design of a novel hybrid mechanical-electrical variable speed wind turbine transmission, and discusses a robust control solution for optimal power output of the wind turbine equipped with such a transmission. The novel, planetary differential transmission would be driven by the variable speed rotor and controlled by a control system to ensure a constant speed of the main generator at a wide range of wind speed variations. Analysis shows that this would lead to an increase in the wind turbine energy output, estimated to be in the range of 15% to 20%, compared to a wind turbine with the same rotor and a fixed transmission. Using robust control design techniques, a single controller is synthesized for efficient operation over the entire anticipated wind speed range. The control system automatically varies the rotor speed to optimize its power output for slow wind speed variation and attenuates high frequency wind gust effects to reduce the resulting fatigue damage. Overall, the new concept provides a cost effective solution for variable speed wind turbine operation. The improved system performance is demonstrated using the results of a numerically simulated dynamic model of the proposed system.

Maximizing Energy Output of a Wind Farm Using Teaching–Learning-Based Optimization

2015 ◽  
Author(s):  
Jaydeep Patel ◽  
Vimal Savsani ◽  
Rajesh Patel
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
Wind Farm ◽  
Optimization Method ◽  
Energy Output ◽  
Wake Effect ◽  
Effective Form ◽  
Teaching Learning Based Optimization ◽  
Teaching Learning ◽  
Variable Wind

World is facing a big problems for fossil fuel as it deals with the issues like availability, environmental effect like global warming etc, which forces us to explore new renewable sources of energy like solar, tidal, geothermal, wind etc. Among all the energies wind energy is the effective form of energy. As evaluated from the research, main cause for reduction of energy output in wind farm is the positioning of the wind turbine, as it is a function of wake loss. Present paper investigates an effective meta-heuristics optimization method known as Teaching–Learning-Based Optimization (TLBO), to optimize the positioning of the wind turbine in a wind farm. Two different scenarios of wind speed and its direction distribution across the wind site is considered like, (a) uniform wind speed of 12 m/s with uniform direction and (b) uniform wind speed of 12 m/s with variable wind direction. The results show that the implementation of TLBO is effective then other existing strategy, in terms of maximized expected power output and minimum wake effect of turbines by each other.

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