Authors:
Essaid Ait El Maati
1
;
Abdallah Boulal
2
;
Ahmed Mouhsen
3
and
Azeddine Mouhsen
2
Affiliations:
1
Laboratory of radiation - matter & Instrumentation, University Hassan the first, Faculty of Science and Technology, B.P.: 577, 26000 Settat, Morocco, Laboratory of Engineering, Industrial Management and Innovation, University Hassan the first, Faculty of Science and Technology, B.P.: 577, 26000 Settat, Morocco, Morocco
;
2
Laboratory of radiation - matter & Instrumentation, University Hassan the first, Faculty of Science and Technology, B.P.: 577, 26000 Settat, Morocco, Morocco
;
3
Laboratory of Engineering, Industrial Management and Innovation, University Hassan the first, Faculty of
Science and Technology, B.P.: 577, 26000 Settat, Morocco
Keyword(s):
Autonomous photovoltaic system, battery charger, SEPIC converter, BOOST converter, PI controller,
MPPT intelligent control.
Abstract:
An Autonomous photovoltaic (PV) system requires a battery charger to store energy for consumption during the night and during days with low irradiation. This paper presents the design of the PV charger system modulator and controller implemented with the asymmetric primary inductance converter (SEPIC). The designed SEPIC is controlled by the MPPT (Pando) command to extract the maximum power of the PV generator. To the used MPPT control, a PI control regulator has been added to manage the charge loop of the battery. Subsequently, a BOOST converter has been associated with the system to adapt the output voltage of the battery to the load. The modeling of the state space is done to determine the transfer function of the converters (SEPIC and BOOST). The values of the PI correctors (Kp and Ki) are obtained using the method of Ziegler Nichols. Finally, we simulated and analyzed the performance of a 250W stand-alone
photovoltaic power system on MATLAB- Simulink.