摘要
电动汽车换电站同时作为储能电站,既可实现经济获利,又兼顾电网支撑,但目前缺乏这种储换一体站的容量配置研究.为此,本文首先分析储换一体站工作模式及电价时段,构建一体站的运行模型;然后,基于用户出行模拟,建立电动汽车换电需求预测模型;接着,建立考虑全寿命周期收益和电网支撑能力的储换一体站容量双层规划模型,外层规划以全寿命周期总收益为目标,实现储换一体站的容量规划,内层规划以对电网支撑能力为目标,实现电池组充放电行为优化,内层获得最优充放电功率并返回外层,实现储换一体站容量最优配置;最后,在IEEE33节点系统上验证规划模型的有效性,为储换一体站建设提供理论支撑.研究结果表明:与其他储换一体站模式相比,储换一体站投资收益率提高1.51%~2.26%;基于双层规划的容量优化配置方法,在保证一体站经济性的同时,能够对支撑电网电压,使电压日方差降低20%;随着参与换电的电动汽车数量增加,一体站的经济性进一步提高.
Electric vehicle(EV) swapping stations can achieve economic benefits while also supporting the power grid by serving as energy storage stations.However,there is currently a lack of research on the capacity configuration of such EV storage and swapping integrated stations(EVSS-IS).To this end,the working mode and tariff period of EVSS-IS were firstly analyzed to build an operational model.Then,a predictive model for EV swapping demand was developed based on user travel simulations.Next,a bi-level capacity programming model of the EVSS-IS was established,which considered life cycle benefits and grid support capacity.Specifically,the outer planning aimed at the total revenue during the whole life cycle to optimize the capacity of the EVSS-IS;the inner planning aimed at supporting the power grid and optimizing the charging and discharging behaviors;the optimal charging and discharging power from the inner layer was returned to the outer layer to realize the optimal capacity programming of the EVSS-IS.Finally,the effectiveness of the planning model was verified on the IEEE33 node system,which provided theoretical support for the construction of the EVSS-IS.The results show that the return on investment of the EVSS-IS is 1.51%–2.26% higher compared with other models;the capacity optimization allocation method based on bi-level planning can support the grid voltage while ensuring the economy of the station,resulting in a 20% reduction in the daily variance of the voltage;as the number of EVs swapping batteries increases,the economics of the EVSS-IS is further improved.
作者
郭爱
叶涵昌
戴朝华
王永强
叶圣永
陈维荣
GUO Ai;YE Hanchang;DAI Chaohua;WANG Yongqiang;YE Shengyong;CHEN Weirong(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,China;State Grid Sichuan Economic Research Institute,Chengdu 610041,China)
出处
《西南交通大学学报》
EI
CSCD
北大核心
2023年第6期1257-1266,共10页
Journal of Southwest Jiaotong University
基金
四川省自然科学基金(2022NSFSC0269)
国家电网公司科技项目(SGSCJY00GHJS2200024)。
关键词
电动汽车换电站
储换一体站
全寿命周期收益
电网支撑能力
双层规划
electric vehicle swapping station
electric vehicle storage-swapping integrated station
life cycle benefits
support ability to grid
bi-level programming
