Abstract: In order to effectively promote the vigorous development of electric vehicles in China, improve the use efficiency of electric vehicles and reduce the environmental pollution in the transportation and logistics industry, this paper intends to carry out a study on the optimal layout of electric vehicle charging/switching facilities by constructing the planning method of electric vehicle charging/switching facilities that takes into account the traffic flow. Firstly, the layout principles of charging/switching facilities of electric vehicles are analyzed from four aspects: convenience principle, economy principle, safety principle and feasibility principle. On this basis, the limitations of the typical site selection model are comprehensively analyzed. With the goal of maximizing the service capacity of the charging/switching facilities, the site selection model of the intercepting flow of the charging/switching facilities of the advanced electric vehicle is constructed, taking into account the traffic flow. Then, considering the NP-hard characteristics of the model, the binary particle swarm optimization (PSO) algorithm is introduced into the distribution model solution of charging/switching facilities to improve the calculation efficiency. Finally, taking a region of Shenzhen city as an example, the planning and layout study of electric vehicle charging/switching facilities is conducted based on MATLAB software to provide an effective plan for the charging/switching facilities layout in this region.

Key words: electric vehicle, charging/switching facility, traffic flow, optimized layout, binary particle swarm algorithm