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Classification of daily solar radiation distributions using a mixture of Dirichlet distributions.

Ted Soubdhan (  Corresponding author ) 1, Richard Emilion 2, Rudy Calif 1

(2008-06-23)

In order to qualify the fluctuating nature of solar radiation under tropical climate, we classify daily distributions of the clearness index kt by estimating a finite mixture of Dirichlet distributions without assuming any parametric hypothesis on these daily distributions. The method is applied to solar radiation measurements performed in Guadeloupe (16°2 N, 61 W) where important fluctuations can be observed even within a short period of a few minutes. The results put in evidence four distinct classes of distributions corresponding to different types of days. The sequence of such classes can be of interest for prediction.

1:	Groupe de Recherche sur les Energies Renouvelables (GRER)
	Université des Antilles et de la Guyane
2:	Mathématiques - Analyse, Probabilités, Modélisation - Orléans (MAPMO)
	Université d'Orléans – CNRS : UMR7349

Subject

:

Sciences of the Universe/Other Physics/Mathematical Physics Mathematics/Mathematical Physics

Keyword(s): clearness index kt – daily distributions – Dirichlet mixture – classification – solar radiation – solar systems

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From: Ted Soubdhan <>

Submitted on: Monday, 23 June 2008 16:51:57

Updated on: Monday, 23 June 2008 17:00:12