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Effects of atmospheric stability on wind resource characteristic parameters
- Source :
- The Journal of Engineering. 2017:676-681
- Publication Year :
- 2017
- Publisher :
- Institution of Engineering and Technology (IET), 2017.
-
Abstract
- The mean wind speed, wind speed distribution, wind shear exponent and wind power density would be affected by terrain, atmospheric stability and equipments, are important parameters in the process of wind resource assessment. However, Conventional methods have always ignored the effects of atmospheric stability, which might make results deviate from the actual situation. The main purpose of this work is to present effects of atmospheric stability on wind resource parameters. Taking 4 years’ measured data as case study, six parameters in wind resource assessing are calculated under different atmospheric stabilities; influential rules of above assessing parameters under varying atmospheric stability are analyzed respectively in order to obtain a systemic relationship between atmospheric stability and wind resource characteristic parameters which is tested by 5th year’s data. Based on these studies, a hub height wind speed extrapolation model is proposed. This model could use different wind shear exponent under various atmospheric stabilities during wind speed extrapolating, rather than an average wind shear for the whole wind farm. In such way, much accurate extrapolating hub wind speed in wind resource assessing is employed, and errors in wind resource assessment might decline. Results validate the simplicity, accuracy and practicality of the proposed method.
- Subjects :
- Wind power
Meteorology
business.industry
Astrophysics::High Energy Astrophysical Phenomena
020209 energy
General Engineering
Extrapolation
Energy Engineering and Power Technology
Terrain
02 engineering and technology
Wind speed
Wind profile power law
Wind shear
Physics::Space Physics
0202 electrical engineering, electronic engineering, information engineering
Atmospheric instability
Wind resource assessment
Astrophysics::Solar and Stellar Astrophysics
Environmental science
business
Physics::Atmospheric and Oceanic Physics
Software
Subjects
Details
- ISSN :
- 20513305
- Volume :
- 2017
- Database :
- OpenAIRE
- Journal :
- The Journal of Engineering
- Accession number :
- edsair.doi...........805c71bdbaa6a67cdc58bb47206257a9