Modelling the distribution of solar spectral irradiance using data mining techniques

Authors:
Rafael Moreno-Sáez;Llanos Mora-López
Affiliations:
Departamento de Física Aplicada II, E.U. Politécnica, Universidad de Málaga, Campus de Teatinos, 29071 Malaga, Spain;Departamento de Lenguajes y Ciencias de la Computación, E.T.S.I. Informática, Universidad de Málaga, Campus de Teatinos, 29071 Malaga, Spain
Venue:
Environmental Modelling & Software
Year:
2014

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Abstract

A procedure for modelling the distribution of solar spectral irradiance is proposed. It uses both statistical and data mining techniques. As a result, it is possible to simulate solar spectral irradiance distribution using some astronomical parameters and the meteorological parameters solar irradiance, temperature and humidity. With these parameters, the average photon energy and the normalization factor, which characterise the solar spectra, are estimated. First, the Kolmogorov-Smirnov two-sample test is used to analyse and compare all measured spectra. The k-means data mining technique is subsequently used to cluster all measurements. We found that three clusters are enough to characterise all observed spectra. Finally, an artificial neural network and a multivariate linear regression are estimated to simulate the solar spectral distribution matching certain meteorological parameters. The results obtained show that over 99.98% of cumulative probability distribution functions of measured spectra are the same as simulated ones.