I am trying to obtain the electric energy that can be obtained from a specific wind turbine. I have two questions about wind energy:
1. I am using the following method to calculate the electric energy (in kWh/yr) from a wind turbine: I have a hourly data series of wind speeds in a study case. With this 8760 wind speeds, the first step was calculate the Weibull probability density function f(v), with two parameters (shape and scale). The second step was search the power curve of the wind turbine, obtaining a power value for each speed value. The third step was multiply f(v) with each power value, according a defined interval for speed (delta V). The last step was applied a sum for all the power values and multiply them by 8760. This is the correct way to obtain the electric energy generated from a wind turbine?
2. If a have a data series of wind speeds in a year (hourly), how can I calculate and, later, to plot the hourly electric energy obtained from the wind turbine? I think in this case I do not have to calculate the Weibull probability density function f(v), because I am going to plot the hourly electric energy value, so I am thinking to multiply the hourly speed value with the power value corresponding to that speed (obtained from the wind turbine power curve). Would it be the correct way to do it?
I appreciate so much your help!
Hi William Lopez
1. Depend on the resolution you want. If you want yearly average then just similarly find the average wind speed of the whole year then convert wind speed to wind power using the power curve. For hourly resolution, you can just find the power output of each hour and find the sum of all 8760 samples (same as the second method you mentioned, it is correct if you want hourly resolution).
There are many methods.
You can find Example calculation in the following link
http://zebu.uoregon.edu/1996/ph162/l14.html
A Methodology on How to calculate power output of wind is shown in the following link
How to calculate power output of wind
https://www.windpowerengineering.com/calculate-wind-power-output/
An important example is presented in this link
https://planetcalc.com/4773/
You can find a Wind Turbine Power Calculator in this link
Wind Turbine Power Calculator
You can find an online Wind Turbine Power Calculator in this link
http://drømstørre.dk/wp-content/wind/miller/windpower%20web/en/tour/wres/pow/index.htm
An interactive Calculation of Wind power and energy is presented here
https://power-calculation.com/wind-power-energy-calculator.php
Thank you so much Qin Chen and Gamal B. Abdelaziz for yours answers. I had a some problems with my algorithm which calculate the produced energy from renewable energies, specially wind energy with hourly data series. I could solve the problem so I can go on forward.
Dear William
You can do that by excel. Weibull parameters can be obtained through using Weibull distribution function in excel. Wind turbine output and capacity factor can be calculated too.
See the following link for more details.
Regards
https://youtu.be/VehitPvKKhk
You can see the following link for more details in the attached file
Article An Energy Storage System Sizing Method for Wind Power Integration
Article Review of wind generation within adequacy calculations and c...
Article Calculating wind turbine component loads for improved life prediction
Let's say you know the power function of the wind turbine (it is proportional to the cube of the wind speed), and the hourly graph of the wind speed. Then the calculation is very simple. Energy for one hour (kWh) is equal to the power in that hour. And then, summing up the energy by the hours cumulative total, you receive energy during the summation time.
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