Characteristics and effect laws of the large-scale electric Vehicle’s charging load

Abstract

The impact of large-scale electric vehicle (EV) charging load on grids has become a hot issue all over the world, which is a strong random process with a variety of factors intertwined, and raises a major problem in research. Therefore, the article presents a decoupling analysis method which studies charging load and normal load independently and then carries out an integrated analysis with the power grid. Firstly, we calculate the average, maximum, minimum, fluctuating power of charging load and their parameters by Monte Carlo method, and get the function laws of vehicle scale and charging power on them. After that, in a scene of large penetration rate, it analyzes the influence of EV on the grid at all levels, and determines the possibility of main problems. By using this method, some conclusions are obtained. The method and the basic laws gained in this paper are universal, and can provide support for the future research of EV’s charging load.