According to introducing prospect theory to establish the theory model of the decision-making behavior of electric vehicle whether to charge at valley time blocks, and defining the critical point of electric vehicle charging choice behavior, influence factors of decision-making behavior are analyzed. Based on the critical point at valley time blocks, the electric vehicle charging patterns containing controlled charging pattern and uncontrolled charging pattern are expounded. Example solves the critical decision point of electric car based on the prospect theory and shows the feasibility of this method. An analysis of factors influencing decision-making behavior is carried out. In two kinds of charging models, the electric vehicle charging power curve is solved based on the critical decision point. Analysis and comparison indicate that the curve is much smoother and existing power network can withstand much more electric vehicle load in controlled charging mode. An analysis of the characteristics of power curve is carried out.%引入前景理论对电动汽车低谷时段是否选择充电这个决策行为进行了理论建模,基于此定义了电动汽车充电行为临界决策点；并基于临界决策点分析了电动汽车低谷充电模式:受控制充电模式和不受控制充电模式.算例基于前景理论的方法求解了电动汽车临界决策点,说明了此方法的可行性,并在此基础上分析了影响决策行为的几个因素.基于临界决策点分别在两种充电模式下求解出电动汽车的充电功率曲线,并对功率曲线的特点进行了分析.
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