ABSTRACT
One of the main drawbacks in adopting EV vehicles is the last mile
connectivity issue. There is always a chance that the user/rider may get
stranded without EV charge and no EV charging stations nearby. With the aim of
solving such an exigency, this paper proposes a novel V2V charging technique
which allows charge transfer between two EVs off the grid, and discusses its
modes of operation. Non-isolated bidirectional DC-DC converters with average
current control technique are simulated in a MATLAB/Simulink environment to
verify and validate the efficiency and charging time for the proposed charging
technique.
KEYWORDS
1.
V2V charging
2.
Bi-directional
converter
3.
Pricing strategy
SOFTWARE: MATLAB/SIMULINK
CONCLUSION
A V2V
charging scheme is proposed to synchronize the charging between two electric
vehicles. This is particularly needed when an EV user is left stranded without battery
charge and with no access to EV charging station. In this scenario, the
proposed model allows another EV user to assist the stranded EV by charging
from his EV thus solving last mile connectivity issues. The proposed model consists
of a dual converter in the electric vehicle which enables fast DC charging or
discharging. Extensive MATLAB simulation results on the model proves that the proposed
work is capable of charging an EV from another under average current control
method. The efficiency, SOC status and charging time for the proposed method is
also analyzed. From the analysis it is evident that as the SOC difference
increases the efficiency obtained also increases. To reduce the charging time
and to enhance the efficiency average current control method is simulated and
analyzed. The results obtained are presented and the results confirm the
effectiveness of the proposed work. V2V energy transfers which were reported in
the earlier literature uses the concept of connected ad-hoc networks present in
parking lots etc., where the vehicles parked in the parking lot are used for
energy transfer through a connected bus in the parking lot itself. The term
‘novel’ has been used here as the issue of EV being left stranded without
battery charge and with no access to charging station is not addressed anywhere
in the literature and also the technique of using cascaded bi-directional
converters for charging one vehicle from the other vehicle adds novelty to the
V2V energy transfer. Cascaded Bidirectional converters can even facilitate the
charge transfer when the electric vehicles battery voltage levels are
different, that’s why cascaded converters has been employed.
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