DocumentCode :
164981
Title :
Fractal order evidences in wind speed time series
Author :
Fortuna, Luigi ; Nunnari, Silvia ; Guariso, Giorgio
Author_Institution :
Dipt. di Ing. Elettr., Elettron. ed Inf., Univ. degli Studi di Catania, Catania, Italy
fYear :
2014
fDate :
23-25 June 2014
Firstpage :
1
Lastpage :
6
Abstract :
This paper describes some evidence of fractal order features in wind speed time series recorded at different observation stations both in USA and in Italy. Analysis were performed by using mono-fractal, multi-fractal and power spectra approaches. Results show that the average value of the box dimension for daily and hourly mean wind speed is D = 1.19 and D = 1.41 respectively, thus indicating that this kind of time series are fractal. The estimated average value of the Hurst exponent is H = 0.81 and H = 0.75 for daily and hourly time series respectively. From these Hurst exponents it is possible to infer the persistent behavior of wind speed. Furthermore, multi-fractal analysis shows that wind speed exhibits a bell-like shape spectrum with average width Δα = 0.47. Power spectra analysis has pointed out that wind speed time series behave as 1/f13 noise with average value of the β exponent of 0.46 and 1.37 for daily mean and hourly mean time series respectively. These latter results can be interpreted by saying that wind speed time series are Brown noise like.
Keywords :
fractals; spectral analysis; time series; wind power plants; Hurst exponent; box dimension; daily mean time series; fractal order evidences; hourly mean time series; monofractal approaches; multifractal spectra approaches; observation stations; power spectra analysis; power spectra approaches; wind speed time series; Correlation; Estimation; Fractals; Shape; Spectral analysis; Time series analysis; Wind speed;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Fractional Differentiation and Its Applications (ICFDA), 2014 International Conference on
Conference_Location :
Catania
Type :
conf
DOI :
10.1109/ICFDA.2014.6967450
Filename :
6967450
Link To Document :
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