Estimation of Effective Wind Speed for Fixed-Speed Wind Turbines Based on Frequency Domain Data Fusion

The rotator of the wind turbine is subject to a spatially and temporally distributed wind field; the wind speed varies significantly at different points over the blades plane. This makes a direct measurement of effective wind speed impossible. We analyze the spectrums of the measurement of the anemo...

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Bibliographic Details
Published inIEEE transactions on sustainable energy Vol. 3; no. 1; pp. 57 - 64
Main Authors Xu, Zhiqiang, Hu, Qinghua, Ehsani, Mehrdad
Format Journal Article
LanguageEnglish
Published IEEE 01.01.2012
Subjects
Data fusion
effective wind speed
Fluid flow measurement
Generators
linear matrix inequalities
Mathematical model
Observers
Power measurement
spectral analysis
Wind speed
Wind turbines
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Summary:The rotator of the wind turbine is subject to a spatially and temporally distributed wind field; the wind speed varies significantly at different points over the blades plane. This makes a direct measurement of effective wind speed impossible. We analyze the spectrums of the measurement of the anemometer and generator power of a wind turbine, and point out that the characteristics of these two signals are complementary in the frequency domain. Then an observer for effective wind speed is proposed based on frequency-domain data fusion. The observer design is formulated as a mixed-sensitivity problem with linear matrix inequalities (LMIs). Simulations were carried out to assess the performance under a realistic wind speed profile. The simulation results show that the observer can not only guarantee the static accuracy, but also improve the dynamic accuracy of the measurements of the effective wind.
ISSN:1949-3029
1949-3037
DOI:10.1109/TSTE.2011.2162638