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Open AccessArticle

Variable Parameters for a Single Exponential Model of Photovoltaic Modules in Crystalline-Silicon

1
Faculty of Engineering, University of Central Punjab, Lahore 54590, Pakistan
2
Department of Electronics and Telecommunication, Politecnico di Torino, 10129 Torino, Italy
3
Department of Energy, Politecnico di Torino, 10129 Torino, Italy
*
Author to whom correspondence should be addressed.
Energies 2018, 11(8), 2138; https://doi.org/10.3390/en11082138
Received: 18 July 2018 / Revised: 8 August 2018 / Accepted: 13 August 2018 / Published: 16 August 2018
(This article belongs to the Special Issue Sustainable Energy Systems)
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Abstract

The correct approximation of parallel resistance (Rp) and series resistance (Rs) poses a major challenge for the single diode model of the photovoltaic module (PV). The bottleneck behind the limited accuracy of the model is the static estimation of resistive parameters. This means that Rp and Rs, once estimated, usually remain constant for the entire operating range of the same weather condition, as well as for other conditions. Another contributing factor is the availability of only standard test condition (STC) data in the manufacturer’s datasheet. This paper proposes a single-diode model with dynamic relations of Rp and Rs. The relations not only vary the resistive parameters for constant/distinct weather conditions but also provide a non-iterative solution. Initially, appropriate software is used to extract the data of current-voltage (I-V) curves from the manufacturer’s datasheet. By using these raw data and simple statistical concepts, the relations for Rp and Rs are designed. Finally, it is proved through root mean square error (RMSE) analysis that the proposed model holds a one-tenth advantage over numerous recently proposed models. Simultaneously, it is low complex, iteration-free (0 to voltage in maximum power point Vmpp range), and requires less computation time to trace the I-V curve. View Full-Text
Keywords: modeling of photovoltaic (PV) module; I-V curve tracer; PV simulator; maximum power point (MPP); Rp and Rs estimations modeling of photovoltaic (PV) module; I-V curve tracer; PV simulator; maximum power point (MPP); Rp and Rs estimations
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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 (CC BY 4.0).
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MDPI and ACS Style

Murtaza, A.F.; Munir, U.; Chiaberge, M.; Di Leo, P.; Spertino, F. Variable Parameters for a Single Exponential Model of Photovoltaic Modules in Crystalline-Silicon. Energies 2018, 11, 2138.

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