Abstract:
A rapid increase in global Electric Vehicle sales has been noticed in recent years due
to rising concerns of environmental pollution and depleting fossil fuel reserves. These
vehicles are ultimately charged from the distribution network. This paper presents a
case study investigating the impact of uncontrolled EV charging on a typical urban
radial residential-commercial distribution feeder for two different EV penetration
levels. Research work further evaluates the effectiveness of consumer-level rooftop
Photovoltaic penetration and employs Valley Filling of EV charging loads to mitigate
the drastic impacts of EV charging. An analysis is being performed in view of the
current condition of the grid that lacks charging station infrastructure and real-time
communication between utility and consumers. DIgSILENT Power Factory software
is used to model distribution networks, loads, and Photovoltaic systems. 24-hour load
flow simulations are executed for multiple scenarios. Results reveal that combined PV
integration and an off-peak EV load transfer strategy can strengthen distribution
network performance by reducing peak demand, improving feeder voltage, decreasing
energy losses, and alleviating the overloading of distribution transformers.
