A procedure to calculate the five-parameter model of crystalline silicon photovoltaic modules on the basis of the tabular performance data

Abstract

Only few manufactures provide the wide set of graphical data that are necessary to use high performance predictive tools for PV systems. On the other hand, reliable graphical data require accurate laboratory measurements that increase manufacturing costs. For this reason PV system designers have to choose between the use of cheap PV modules, lacking in technical data, and the reliable energy predictions that are possible only if the current–voltage characteristics are provided by the PV module manufacturers.\ud This paper describes the procedure to evaluate the parameters of a one-diode equivalent circuit able to accurately epresent the electrical behaviour of a PV panel by means of the minimum set of technical data that are usually provided by all manufacturers. To reach the purpose some correlations based on the survey of more than one hundred PV module characteristics were defined to make up for the lack of technical\ud information. The computer routines used to evaluate the values of the model parameters are listed; the routines are written in BASIC and can be easily implemented, even like VBA macros in Microsoft Excel.\ud The capability of the new model to calculate the current–voltage characteristics was tested by comparing the results with data measured by four different manufacturers. The results of the application of the new model confirm the reliability of the proposed procedure. The differences between the calculated and the measured data are always less than the data tolerance usually declared by the manufacturers

On the analytical approach for modeling photovoltaic systems behavior

“…With regard to the practical use of these parameters, empirical methods to estimate them have been recently developed for photovoltaic arrays [47].…”

“…instead of the ideality factor, a. Following the empirical procedure described by Orioli and Di Gangi (2013), the slopes of the I-V curve at the open circuit and short circuit points are [47]: …”

Temperature changes of I-V characteristics of photovoltaic cells as a consequence of the Fermi energy level shift

“…Increasing temperature decreases the open-circuit voltage. This effect simultaneously increases the short-circuit current (Orioli, Di Gangi 2013; Barukcic et al 2014; Baig et al 2015). The efficiency of the photovoltaic energy conversion thus decreases with the increasing temperature (Karatepe et al 2007).…”

Very accurate parameter estimation of single- and double-diode solar cell models using a modified artificial bee colony algorithm

“…At this time, a variety of methods are available for parameter estimation of these two electrical models. Some attempts in this field are focused on using classical analytical and numerical methods for parameter estimation based on minimization of a suitably chosen cost function [1,[5][6][7][8][9][10]. The main drawback of such classical methods is the high probability of falling in local optimums, besides the complexity of calculations.…”