Fig 1.
Schematic of the grid-connected PV system.
Fig 2.
Equivalent circuit of the PV model.
Fig 3.
Characteristic curves of PV.
Table 1.
Main parameters of the PV module.
Fig 4.
Grid-connected PV system with three-phase inverter control scheme.
Table 2.
Main parameters of the inverter connected grid.
Fig 5.
Block diagram of the PLL.
Fig 6.
Current controller in the grid-connected mode.
Fig 7.
Schematic diagram of the proposed PSO optimization technique for the inverter control scheme.
Table 3.
Advantages and disadvantages of the control algorithm.
Fig 8.
Flowchart of the PSO algorithm for the three-phase grid-connected inverter control system.
Fig 9.
The pseudocode of the proposed PSO algorithm.
Table 4.
Comparison of the final parameters values with different technique.
Fig 10.
DC link voltage for both the conventional and optimization methods.
Fig 11.
Three-phase output voltage comparison of the output grid system.
Fig 12.
Three-phase output current for the grid system.
Fig 13.
(a) PI controller and (b) PI with PSO technique.
Fig 14.
THD and harmonic spectrum of the inverter output voltage.
(a) Conventional PI controller; (b) PI controller with PSO.
Fig 15.
THD and harmonic spectrum of the inverter output current.
(a) Conventional PI controller; (b) PI controller with PSO.
Fig 16.
Relationship curve between fitness function and iteration.
Fig 17.
Frequency response of the grid-connected PV system.
Fig 18.
Active current references of the inverter control system under load variation.
Fig 19.
Active current references of the inverter control system under grid disturbance.
Table 5.
Comparison of reported works.