Page 177 - Advances in Renewable Energies and Power Technologies

150 CHAPTER 4 Performance of MPPT Techniques of Photovoltaic Systems

FIGURE 4.35
The total generated power along with terminal voltage for different radiations of shaded PV
cell in case of 20 series PV cells with bypass diodes.

If the system operates at the MPP #2
90
MML ¼ 100 ¼ 42:06%
60 þ 90 þ 64
If the system operates at the MPP #3
64
MML ¼ 100 ¼ 29:91%
60 þ 90 þ 64
So, it is clear that the power generated from the PV system can be increased by
((90 60)/60*100) ¼ 50% and ((90 64)/64*100) ¼$41% if the system works on
point #2 instead of points #1 and #3, respectively. Conventional MPPT techniques
stick in LP and can not follow the GP. But, MPSO technique has been introduced
to actively track the GP power which can increase the generated power considerably
and reduce the effect of hot-spot phenomena. In the following section, a comparison
between the use of FLC and PSO in MPPT of PV systems under shaded conditions
has been introduced in detail.

3.3 SIMULATION OF PROPOSED SYSTEMS

A model of PV module and dcedc boost converter with FLC and PSO techniques of
MPPTs were simulated using PSIM and Simulink software. Co-simulation between