Lecture 3B - Power from Wind - Part 2

Lecture 3B - Power from Wind - Part 2 - ECE 4364/5374G...

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1/28/11 1 ECE 4364/5374G-3B (c) Saifur Rahman 1 Professor Saifur Rahman Electrical & Computer Engineering Dept. Virginia Tech ECE 4364/5374G: Alternate Energy Systems Lecture 3B: Power from Wind ECE 4364/5374G-3B (c) Saifur Rahman 2 Summary of Lecture 3A
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1/28/11 2 ECE 4364/5374G-3B (c) Saifur Rahman 3 B. Blade Pitch Angle By turning the face of the blade away from or into the wind, the lift on the blade can be decreased or increased. This is called blade pitch control. Example 4.4 Compute the rated output power from a WTG with the following: V R = 12.50 m/s V C = 6.26 m/s Blade Diameter = 91.44 m ECE 4364/5374G-3B (c) Saifur Rahman 4 Recall eqn. 4.23, (Note: The factor 8/9 accounts for the blade tip loss) Assuming e=0.70 which accounts for the electrical and frictional losses, as well as non-ideal C p , the rated power output of the machine will be P R = 2,470 kW. The nameplate rating of MOD-2 design is 2,500 kW. What follows is a 60-sec output profile of a MOD-2 WTG
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1/28/11 3 ECE 4364/5374G-3B (c) Saifur Rahman 5 ECE 4364/5374G-3B (c) Saifur Rahman 6 4.4 [email protected] in Wind Power According to eqn. 4.23, the available power from a WTG has to be calculated in two stages. This is because of the distinctly different performance of the WTG
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Lecture 3B - Power from Wind - Part 2 - ECE 4364/5374G...

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