Optimal Placement of Electric Vehicle Charging Stations in a Distribution Network

摘要

The rising popularity and improved environmental awareness are making the present transportation network move towards electric vehicles (EVs). With the increased number of grid-connected EVs, inappropriate placement of charging stations (CSs) will be injurious to city traffic layout and the power distribution network. It will also deprive the convenience of EV owners and increase distribution loss. Therefore, this paper proposes a new method for optimal allocation of CSs by minimizing distribution losses of the system and increasing the utilization factor of CSs. Since these two objectives are contradictory, non-dominated sorting genetic algorithm (NSGAII) is used to solve them. A probabilistic load modelling method is employed to develop the charging demand of EVs. The proposed method is tested on a test system which is obtained by modifying the standard IEEE 33 bus system. Simulation results show that the proposed method is not only able to reduce the system loss but also achieve economical benefits while placing CSs in a network.