Practical Planning Of Highway Charging Stations Considering The Uncertainty Of Traffic Flow

Due to the energy crisis and environmental pollution,the electric vehicle(EV)industry develops rapidly.The inventory of EV increase greatly because of the governments’ policy support.Charging station is the infrastructure which could provide power supplement for EVs,and the reasonable planning of charging station will alleviate the range anxiety problems of EV drivers,which will promote the popularity of EVs.Highway is the important infrastructure between cities,and the charging stations on the highway aim to satisfy the power demand of EVs,which plays an important role in the cities’ development.The highway is selected as the research scene,and the research of rest area planning is summarized for reference.The traffic accident is also involved in this paper,which will affect the traffic flow of highway.A practical planning method is proposed in this paper,and the main contribution of this paper could be summarized as:(1)Summarizing the basic function and facility of highway rest area,and planning rules and method are analyzed considering the location,distance,siting and sizing.The traditional charging statin planning method is compared with the rest area planning theory,and a novel planning model is proposed,which aims at satisfying the multiple-demand of EV and the passengers as well as considering the safe operation of distribution network.(2)An improved dynamic traffic flow simulation method considering the traffic accidents is proposed in this paper.The Monte Carlo method is used to simulate the time and location of accidents,and impact analyzing model is proposed to describe the accidents’ impact on the traffic flow.The EV state of charge(SOC)model is proposed to describe the SOC-time and SOC-distance variation.Then,the improved genetic algorithm is used to solve the planning model.(3)The charging station planning method is tested in a highway road network to verify the effectiveness of the proposed method.The result is analyzed from several aspects including the traffic accidents,rest area and solving time.The testing results shows that proposed method could fully satisfy the multiple demand of EV,including charging,parking and rest,and the planning cost is saved.Meanwhile,the traffic accidents will have an obvious impact on the traffic flow of highway,so the traffic accidents should be considered in the charging station planning research.