Abstract

RAMOS-PAJA, CARLOS ANDRÉS; BASTIDAS, JUAN DAVID  and  SAAVEDRA-MONTES, ANDRÉS JULIÁN. EXPERIMENTAL VALIDATION OF A MODEL FOR PHOTOVOLTAIC ARRAYS IN TOTAL CROSS-TIED CONFIGURATION. Dyna rev.fac.nac.minas [online]. 2013, vol.80, n.182, pp.191-199. ISSN 0012-7353.

An extended analysis and the experimental validation of a mathematical model for Total Cross-Tied photovoltaic arrays, based on the inflection points concept, is presented. The model is able to reproduce the electrical characteristics of real photovoltaic plants in both uniform and mismatched conditions (e.g. partial shading). The model calculates the array voltages in which the bypass diodes are turned on, which allows one to detect when a photovoltaic module is active or bypassed in order to consider or neglect its contribution to the array current and power. Such a procedure generates a significant reduction in the computational burden required in comparison with classical approaches. The experiments presented in this paper confirm the advantages of the model: low computational burden, high accuracy reproducing the experimental data, and its usefulness to perform energetic evaluations for viability analysis.

Keywords : photovoltaic array; mathematical model; inflection points; low computational burden; experimental validation; total cross-tied configuration.

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