Abstract: Using electric vehicle can effectively alleviate the energy crisis and environmental pollution and the researches on electricity related problem are very necessary and urgent. First, this paper analyzes the new power industry chain structure of EV charging system and establishes the related system dynamics model taking into account the economy of the industry chain. Then, it collects the basic data from a specific scale of EV charging system, uses the Vensim software to operate the system simulation through changing values of profit rate, profit adjustment rate, electricity price sensitivity, and so on. It quantifies the electricity consumption and charging price, and gets equilibrium values and curves related to both investment recovery period and electric charging models to search for the optimal decision reference, which has a realistic significance. Finally, the paper summarizes the advantages and disadvantages of the model and gives some suggestions for model improvement.

Key words: systems engineering, balance of interests, system dynamics, electric vehicle charging system

摘要： 使用电动汽车可以有效缓解能源危机和环境污染等问题，对于电动汽车用电问题的研究是非常必要和迫切的.本文首先通过对电动汽车充换电产业链结构进行分析，在充分兼顾产业链上各经济主体利益的基础上建立了电动汽车用电相关因素的系统动力学模型.然后收集一类特定规模充换电站的基础数据，采用Vensim软件对系统进行模拟，在调整收益率调节度的基础上通过改变收益率、用户电价敏感程度等因素，量化用电量、供充电电价等指标，得到与投资回收期和充换电模式有关的均衡值以及对比曲线，为寻找最优决策提供参考依据，具有现实意义.最后总结了该模型的优缺点，并为模型改进提出建议.

关键词: 系统工程, 利益均衡, 系统动力学, 电动汽车充换电系统