Page 152 - Advances in Renewable Energies and Power Technologies

2. PV System Under Nonshading Conditions 125

fcn

FIGURE 4.6
Simulink simulation model of the PV system with fuzzy logic controller (FLC) as MPPT.

A wide variety of research work have been done to implement a mathematical
model for PV cell. The two-diode model has been used in many studies [57e59].
This model of PV cell is shown in Fig. 4.7 and Eq. (4.7). This model is very accurate
but it needs intensive mathematical manipulation.
2 3 2 3

q q
KT ðVþR s IÞ 2KT ðVþR s IÞ V þ R s I
I ¼ I PH I sat1 e 1 I sat2 e 1
5
5
4
4
R sh
(4.7)
One-diode model is a widely used model than the two-diode model for PV cell
simulation because of its simplicity with acceptable accuracy and its parameter can
I R D I 1 D I R S I
2
SH
V
R Load
I LG SH
FIGURE 4.7
Equivalent circuit of photovoltaic cell (two diodes model).