Power Quality Impact of Electric Buses’ Charging

Abstract

Given the uncertainty regarding the adoption rates of electric vehicles (EV), as well as the evolution of the transport market as a result of the lack of legislation and supporting programs, as well as the types of mobility and charging infrastructure solutions, forecasting the impact of electric vehicles on the distribution grid can be challenging. It would be beneficial for grid operators to have a solid understanding of these issues once e-mobility becomes more prevalent. This paper addresses issues related to the estimated impact of large-scale implementation of electric vehicles on the power quality in Romanian power distribution system. Here are analyzed power quality parameters measured in the power distribution grid during the charging process of the electrical buses belonging to the local public transportation fleet. The results of this study are supporting the further actions designated to improve the power quality in the distribution systems, and to allow a higher integration of the EV by avoiding grid’s reliability problems and costly reinforcements.