An Accurate Physical Model for PV Modules with Improved Approximations of Series-Shunt Resistances

José Maurilio Raya-Armenta, Pabro R. Ortega, Najmeh Bazmohammadi, Sergiu V. Spataru, Juan C. Vasquez, Josep M. Guerrero

Research output: Contribution to journalJournal articleResearchpeer-review

3 Citations (Scopus)
119 Downloads (Pure)

Abstract

An accurate model to represent the photovoltaic modules is essential to facilitate the efficient deployment of these systems in terms of design, analysis, and monitoring considerations. In this respect, this study proposes a new approach to improve the accuracy of the widely-used five-parameter single-diode model. Two new physical equations are introduced to represent the series and shunt resistances while the other parameters are represented by well established physical expressions. In the proposed model, most of the parameters are in terms of the cell temperature, irradiance, and datasheet values, while a few parameters need to be tuned. The model is compared with four well-known methodologies to extract the parameters of the single-diode and double-diode models. The simulation studies make use of the different I-V characteristics provided in the PVs' datasheets, characteristics extracted from an outdoor module, as well as the ones simulated with the software PC1D. The results show an improved precision of the proposed model to estimate the power characteristics for a wide range of temperatures and irradiances, not only in the MPP, but also in the whole range of voltages. Furthermore, the proposed physical model can be easily applied to other kind of studies where a physical meaning of the PV parameters is of great importance.
Original languageEnglish
Article number9363280
JournalI E E E Journal of Photovoltaics
Volume11
Issue number3
Pages (from-to)699-707
Number of pages9
ISSN2156-3381
DOIs
Publication statusPublished - 2021

Keywords

  • Bandgap energy
  • Photovoltaic (PV)
  • Physical modeling
  • Series resistance
  • Shunt resistance
  • Single-diode model
  • Translating equations

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