Impact of the Charging Station on the Quality of Voltage and Frequency in the Microgrid

Abstract

This paper presents the impacts of Electric Vehicle Charging Stations (EVCSs) on voltage and frequency quality in the Microgrid. It addresses security analysis, voltage and frequency quality, as well as issues related to EVCSs. In this paper, modeling and simulation method is utilized to evaluate the impact of Charging Stations (CSs) in Microgrid power systems using PowerWorld software. Potential attacks may occur when malicious actors intrude and control the operating states of CSs in the power grid, as well as potential vulnerabilities in the process of using EVs in Microgrid, are simulated and analyzed. Based on this, the paper proposes power grid attack scenarios based on charging/discharging operations with a large number of EVs on generator buses. Simulation results show the negative impacts of charging/discharging operations on the grid through frequency and voltage fluctuations. Specifically, from the simulation results, it can be observed that Bus 8 is not suitable for installing a charging station due to its weak stability at all power levels. Furthermore, the remaining generator buses can only accommodate charging stations with power levels starting from 30% of the proposed initial capacity to maintain system stability.