Classification of daily solar irradiation by fractional analysis of 10-min-means of solar irradiance |
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| Authors: | S Harrouni A Guessoum A Maafi |
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| Institution: | (1) Solar Instrumentation & Modeling Group/LINS – Faculty of Electronics and Computer, University of Science and Technology H. Boumediene (USTHB), El-Alia, Algiers, Algeria;(2) Signal Processing and Imagery Laboratory, University of Blida, Blida, Algeria;(3) International Center for Theoretical Physics Abdus-Salam, AS-ICTP, Trieste, Italy |
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| Abstract: | Summary This paper deals with fractal analysis of daily solar irradiances measured with a time step of 10 minutes at Golden and Boulder located in Colorado. The aim is to estimate the fractal dimensions in order to perform classification of daily solar irradiances. The estimated fractal dimension
and the clearness index KT are used as classification criteria. The results show that these criteria lead to three classes: clear sky, partially covered sky and overcast sky. The results also show that the evaluation of the fractal dimension of the irradiance signal based on a data set with 10 minutes time step is possible. |
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