A method for simulating large PV arrays that include reverse biased cells

•The approach allows to simulate cell-by-cell the mismatched PV arrays.•The PV array non-linear model is solved by a low computational burden algorithm.•The technique is useful to analyze the hot-spot heating and the effect of parametric tolerances.•The proposed method is simple to be implemented in...

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Bibliographic Details
Published in:Applied energy 2014-06, Vol.123, p.157-167
Main Authors: Orozco-Gutierrez, M.L., Ramirez-Scarpetta, J.M., Spagnuolo, G., Ramos-Paja, C.A.
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Equipments, installations and applications
Exact sciences and technology
Hot spot phenomenon
Mismatched condition
Natural energy
Photovoltaic cells
Photovoltaic conversion
Reverse mode
Simulation
Solar energy
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Summary:•The approach allows to simulate cell-by-cell the mismatched PV arrays.•The PV array non-linear model is solved by a low computational burden algorithm.•The technique is useful to analyze the hot-spot heating and the effect of parametric tolerances.•The proposed method is simple to be implemented in any programming language. This paper proposes an effective algorithm for simulating a large mismatched photovoltaic array. The technique allows to reproduce the array behavior at a cell level, including both the direct and the reverse operating mode, thus making the analysis of the hot-spot phenomenon possible. The algorithm is also able to manage the electrical variables related to the bypass diodes, which are usually connected in anti-parallel with a number of series connected cells. The non-linear system of equations describing the array is solved by using a suitable algorithm, introduced herein, for the inversion of the Jacobian matrix. The proposed procedure guarantees a high accuracy at a low computational burden. Some simulation examples allow to show the features of the technique on practical cases and to confirm its outstanding performances.
ISSN:0306-2619
1872-9118
DOI:10.1016/j.apenergy.2014.02.052