  This paper investigates the impact of the charging level of high penetration
level of Electric Vehicles (EVs) on the power quality of the electricity
distribution network. The EV owners tend to charge their EVs as fast as
possible. The charging levels of EVs within the distribution network affect the
voltage profile of buses of the network. In this paper, an exact Second-Order
Cone Programming (SOCP) formulation of the full AC optimal power flow (ACOPF)
problem of the distribution network is presented. The network includes solar
generation units and EVs as Distributed Energy Resources (DERs). Different
charging levels are considered to analyze the impact of EVs on the distribution
network. The performance of the proposed model is illustrated for the modified
IEEE-33 bus system for different charging levels for EVs. Besides, the impact
of available solar power and battery degradation cost of EVs on the
distribution network is investigated. It is illustrated that how EV charging
will cause voltage deviation challenges for the distribution network.
