共享储能模式下电动汽车充电站双层优化运行策略

Optimized operation strategy of electric vehicle charging stations inshared energy storage mode on two layers

在电动汽车持有量快速增长的背景下,电动汽车充电站的建设需求日益强烈。为了提高充电站运行经济性,文中提出接入共享储能的电动汽车充电站优化调度方法。首先,分析分布式储能和共享储能的运行模式,以充电站年投资成本和年运行成本最低为上层目标函数,以典型日运行成本最小为下层目标函数,构建考虑储能不同运行模式的电动汽车充电站双层优化调度模型。其次,对3个具有差异性的电动汽车充电站进行仿真,并将多个场景下的不同储能运行模式进行对比。然后,在此基础上,针对共享储能服务费以及电动汽车放电损耗进行灵敏度分析。最后,算例表明,共享储能的接入对降低电动汽车充电站规划和运行成本具有积极作用,合理的储能服务费定价和电动汽车放电损耗成本能减少充电站运行成本。

Against the backdrop of rapid growth in electric vehicle holdings,there is a growing demand for the construction of electric vehicle(EV)charging stations.To improve the charging station operation economy,an optimal scheduling method of EV charging stations with access to shared energy storage is proposed.Firstly,the operation modes of distributed energy storage and shared energy storage are analyzed,and the two-layer optimal scheduling model of EV charging station considering different operation modes of energy storage is constructed by taking the lowest annual investment cost and annual operating cost of charging station as the upper level objective function and the lowest typical daily operation cost as the lower level objective function.Secondly,three EV charging stations with differentiation are simulated and different energy storage operation modes in multiple scenarios are compared.Sensitivity analyses are then conducted on this basis for the effects of shared energy storage service fees and EV discharge losses on dispatching results.Finally,the example shows that shared energy storage access has a positive effect on reducing the operating costs of charging stations,and that reasonable pricing of the energy storage services and the cost of EV discharge losses can reduce the operating costs of charging stations.