| In recent years,environmental problems have become increasingly serious.Urban air pollution is urgent to be solved.Electric vehicle(EV)has been widely concerned due to its advantages,such as clean and favorably pollution control.Development of electric vehicle is bound to bring new challenges to the construction of charging facilities.Charging pile is the basic unit of charging facilities,reasonable analysis of which plays a crucial role in the construction of electric vehicle charging facilities.Therefore,the demand of charging piles will be studied in this paper.Firstly,research on EVs’ charging demand is summarized as well as research on vehicle trip chain and the demand analysis of charging facilities.Then,based on the previous research,a new way is put forward to analyze demand of pile,that is,through the stochastic simulation of electric vehicle charging and travel behavior,the number of vehicles on parking and charging can been recorded,so that we can get the ratio of the piles which occupy parking spaces.A calculating method of demand of charging piles based on vehicle behavior stochastic simulation is presented.Six charging areas are built by correlation analysis of parking time in different places,drivers’ acceptance range of battery state of charge are considered,and EV’s traveling and charging model is established,where Monte Carlo Method is used to stimulate EVs’ daily trip chain and charging demand in each destination.Meanwhile,the variation of parking number and the simultaneity of charging number are recorded.The proportion of total charging piles with parking space and the proportion of fast and slow piles are available in each area when entering the scale and proportion of EVs.Finally,based on the actual driving data,inputting of the electric vehicle simulation and the proportion of each type of electric vehicle,ratio of the pile position in each area and the proportion of the fast and slow charging piles is available. |
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