Load modeling method for EV charging stations based on trip chain

The wide application of electric vehicles (EVs) will lead to new load peaks of power grid, so it is necessary to study the load characteristics of EV charging stations. In this paper, a novel method is proposed to determine the charging loads of different charging stations based on trip chain. First, the types of EV charging stations are classified according to the trip destinations. Then, the probability distribution of characteristic variables in a trip is obtained with the analysis of national household trip survey (NHTS) data. Finally, the load model of different charging stations is established and solved by Monte Carlo simulation (MCS) method. The simulation results verify verify the effectiveness of the proposed method. And with high penetration of EVs, the maximum load of power grid increases obviously.