Accurate models of the electrical behaviour of photovoltaic modules are effective tools for system design. One or two diode equivalent circuits have been widely used even though some mathematical difficulties were found dealing with implicit equations. In this paper, a new model based on a simple rational function, which does not contain any implicit exponential form, is presented. The model was conceived in order to be used with thin-film photovoltaic modules, whose current–voltage curves are characterised by very smooth shapes. The parameters of the model are evaluated by means of the derivatives of the issued characteristics in the short circuit and open circuit points at standard rating conditions, and assuming that the calculated current–voltage curve contains the rated maximum power point of the simulated panel. The capability of the model to calculate the current–voltage characteristic for values of the solar irradiance and cell temperature far from the standard rating conditions was verified for various thin-film technologies, such as CIS, CIGS, amorphous silicon, tandem and triple-junctions photovoltaic modules. A comparison with the results obtained by another rational model and other two-diode models, which were used to simulate the electrical behaviour of thin-film photovoltaic modules, is also presented.

Miceli, R., Orioli, A., Di Gangi, A. (2015). A procedure to calculate the I–V characteristics of thin-film photovoltaic modules using an explicit rational form. APPLIED ENERGY, 155, 613-628 [10.1016/j.apenergy.2015.06.037].

### A procedure to calculate the I–V characteristics of thin-film photovoltaic modules using an explicit rational form

#### Abstract

Accurate models of the electrical behaviour of photovoltaic modules are effective tools for system design. One or two diode equivalent circuits have been widely used even though some mathematical difficulties were found dealing with implicit equations. In this paper, a new model based on a simple rational function, which does not contain any implicit exponential form, is presented. The model was conceived in order to be used with thin-film photovoltaic modules, whose current–voltage curves are characterised by very smooth shapes. The parameters of the model are evaluated by means of the derivatives of the issued characteristics in the short circuit and open circuit points at standard rating conditions, and assuming that the calculated current–voltage curve contains the rated maximum power point of the simulated panel. The capability of the model to calculate the current–voltage characteristic for values of the solar irradiance and cell temperature far from the standard rating conditions was verified for various thin-film technologies, such as CIS, CIGS, amorphous silicon, tandem and triple-junctions photovoltaic modules. A comparison with the results obtained by another rational model and other two-diode models, which were used to simulate the electrical behaviour of thin-film photovoltaic modules, is also presented.
##### Scheda breve Scheda completa Scheda completa (DC)
2015
Settore ING-IND/11 - Fisica Tecnica Ambientale
Miceli, R., Orioli, A., Di Gangi, A. (2015). A procedure to calculate the I–V characteristics of thin-film photovoltaic modules using an explicit rational form. APPLIED ENERGY, 155, 613-628 [10.1016/j.apenergy.2015.06.037].
File in questo prodotto:
File
Articolo.pdf

Solo gestori archvio

Descrizione: Articolo principale
Tipologia: Versione Editoriale
Dimensione 1.29 MB
Utilizza questo identificativo per citare o creare un link a questo documento: `https://hdl.handle.net/10447/140892`