A Novel High Accuracy PV Cell Model Including Self Heating and Parameter Variation

Abstract

This paper proposes a novel model for a PV cell with parameters variance dependency on temperature and irradiance included. The model relies on commercial available data, calculates the cell parameters for standard conditions and then extrapolates them for the whole operating range. An up-to-date review of the PV modeling is also included with series and parallel parasitic resistance values and dependencies discussed. The parameters variance is analyzed and included in the proposed PV model, where the self-heating phenomenon is also considered. Each parameter variance is compared to the results from different authors. The model includes only standard components and can be run on any SPICE-based simulator. Unlike other approaches that consider the internal temperature as a parameter, our proposal relies on air temperature as an input and computes the actual internal temperature accordingly. Finally, the model is validated via experiments and comparisons to similar approaches are provided.

Photovoltaic Cell and Module I-V Characteristic Approximation Using Bézier Curves

“…The graphical representation of the date fitting is given in Figure 12, where just the endpoints are represented. Figure 13 depicts the relative error of the modeled I-V characteristic compared with the actual data taken from our previous work [12]. In the 0 … 0.96 range, the relative error is below 2%.…”

“…In order to further validate the proposed method, in this section we analyze the temperature and irradiance influence for the MSMD290AS-36_EU Monocrystalline PV module. An extensive study of the parameters influence over the PV cell can be found in [12]. It is important to notice that the Bézier approximation is not related to any of these parameters variation, just to the specified points , , and the parasitic resistances ℎ0 and 0 as already stated.…”

“…The control points 00 , 01 , 02 , 03 = 10 and 11 are collinear and with , are all being placed on the I-V characteristic. The relative error of the Bézier modeled I-V characteristic against the actual data taken from [12] is shown in Figure 11. It must be emphasized that in the 0 … 0.94 range, the relative error is below 1%.…”

“…Ishaque and Salam [9] propose for the A possible way for defining ℎ behavior is suggested in [12], as in (25) with ℎ estimated as 8 for the best fit.…”

“…Franzitta et al provide extensive studies of the most widely used models both in single diode case [10] and for the double-diode version [11], introducing a criterion for rating the accuracy and usability of the analyzed models. In our previous paper [12], we proposed a complete SPICE model including all the parameters variation and selfheating. In a recent work, Cuce et al [13] claim a good accuracy for their electrical model for a PV module and they also discuss energy and exergy efficiency as a reliable substitute for the fill factor.…”