Analysis of non-sinusoidal wave generation during electric vehicle charging and their impacts on the power system

Abstract

Interconnection of EVs could impact adversely the power system operation including power quality and safety of the power grid since the present electric power distribution network may not be designed to support the expected proliferation of EV along with other nonlinear loads and resources that are expected to occur in the future. Numerous studies on the effects of charging EVs using the existing local distribution grid has been reported in the literature, but most works on EVs impact on the distribution network are focused on the fundamental current and voltage waveforms (i.e., 60 Hz) to derive the associated impacts to the electric grid delivery system. In this paper we present our initial work that broadens the above analysis to include current harmonic distortion (iTHD) and the associated voltage harmonic distortion (vTHD) injected into the grid from EV battery charger.