ABSTRACT:
During
the recent decade, the automobile industry is booming with the evolution of
electric vehicle (EV). Battery charging system plays a major role in the
development of EVs. Charging of EV battery from the grid increases its load
demand. This leads to propose a photovoltaic (PV) array-based off-board EV
battery charging system in this study. Irrespective of solar irradiations, the
EV battery is to be charged constantly which is achieved by employing a backup
battery bank in addition to the PV array. Using the sepic converter and
three-phase bidirectional DC–DC converter, the proposed system is capable of charging
the EV battery during both sunshine hours and non-sunshine hours. During peak
sunshine hours, the backup battery gets charged along with the EV battery and
during non-sunshine hours, the backup battery supports the charging of EV
battery. The proposed charging system is simulated using Simulink in the MATLAB
software and an experimental prototype is fabricated and tested in the
laboratory and the results are furnished in this study.
SOFTWARE: MATLAB/SIMULINK
CONCLUSION:
In this paper, an off-board EV battery
charging system fed from PV array is proposed. This paper discusses the
flexibility of the system to charge the EV battery constantly irrespective of
the irradiation conditions. The system is designed and simulated in Simulink environment
of the MATLAB software. The hardware prototype is fabricated and tested in
laboratory for the three modes of operation of the proposed charging system
separately and the results are furnished. In OPAL-RT Real time simulator
OP4500, experimental investigation is carried out in RCP methodology and the
dynamic response of the system is furnished both in simulation and experimental
investigation. Correlation between the simulation and experimental results
emphasise the effectiveness of the proposed charger.
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