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International Journal of Photoenergy
Volume 2014, Article ID 946360, 10 pages
http://dx.doi.org/10.1155/2014/946360
Research Article

Very Fast and Accurate Procedure for the Characterization of Photovoltaic Panels from Datasheet Information

1Department of Engineering, Università di Roma Tre, Via Vito Volterra 62, 00146 Roma, Italy
2DIEEI, Università di Catania, Viale A. Doria 6, 95125 Catania, Italy

Received 1 November 2013; Accepted 12 February 2014; Published 24 March 2014

Academic Editor: Ismail H. Altas

Copyright © 2014 Antonino Laudani et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In recent years several numerical methods have been proposed to identify the five-parameter model of photovoltaic panels from manufacturer datasheets also by introducing simplification or approximation techniques. In this paper we present a fast and accurate procedure for obtaining the parameters of the five-parameter model by starting from its reduced form. The procedure allows characterizing, in few seconds, thousands of photovoltaic panels present on the standard databases. It introduces and takes advantage of further important mathematical considerations without any model simplifications or data approximations. In particular the five parameters are divided in two groups, independent and dependent parameters, in order to reduce the dimensions of the search space. The partitioning of the parameters provides a strong advantage in terms of convergence, computational costs, and execution time of the present approach. Validations on thousands of photovoltaic panels are presented that show how it is possible to make easy and efficient the extraction process of the five parameters, without taking care of choosing a specific solver algorithm but simply by using any deterministic optimization/minimization technique.