Integration and Co-ordinated Operation of Stationary Batteries with Fast Charging Stations

Abstract

Plug-in electric vehicles (PEVs) will be a worthwhile share of the transportation system in a near future. Nevertheless, a large network of Fast Charging Stations (FCSs) is essential to enable the PEVs to be competitive with traditional vehicles for long distances. FCS creates heavy loading on the distribution system owing to the high power requirement for simultaneously charging various PEVs. This significant loading results in heavy stress on the system, which could negatively impact the grid performance. An electric energy storage system integration inside the FCS could mitigate these impacts. In this paper, an investigation of the impacts of FCSs on the distribution system has been performed. Furthermore, an analytical approach for coordination of charging/ discharging of stationary batteries (SB: a unit containing some batteries is used as an energy storage system) with FCS is developed. Which addresses technical issues such as peak demand, voltage profile deviation, and power loss in the system. The stationary batteries are used in two modes grid to the battery (G2B) and battery to the vehicle (B2V) for optimal coordination of SB with FCS. The simulations are carried out on the IEEE-33 bus distribution system.