光储式电动汽车充电站微网运行及V2G实现研究

Operation and V2G Realization of EV Charging Station Micro-grid with PV/Storage Power

研究光储式电动汽车充电站微网运行模式,对电网的经济稳定运行和低碳的实现具有重要的意义。提出了一种光储式电动汽车充电站微网结构,详细介绍了其结构及功能实现。其中,双向DC/DC采用限幅电流闭环控制;双向AC/DC借鉴微网控制策略,当处于并网整流及PQ逆变控制模式下采用电压外环、电感电流内环控制,当处于离网V/f及Droop逆变控制模式下采用电压外环、电容电流内环控制。文中还搭建了相应的Simulink仿真平台,仿真结果表明,系统在并网模式下能够快速稳定地实现V2G技术,且孤岛模式下亦能稳定运行和可靠供电。对于新型电动汽车充电站的设计和工程实现具有切实的参考价值。

The study on micro-grid operation mode of EV charging station with PV /storage power is of great significance to the realization of grid stable operation and low carbon economy. In this paper,a micro-grid structure of EV charging station with PV /storage power is proposed,and its structure and function realization are introduced. Within the micro-grid,a limited current closed-loop control strategy is used to control the bi-directional DC /DC converter.Then bi-directional AC /DC converter is controlled referring to micro-grid control strategies: the voltage outside and inductance current inside double closed-loop is used for grid-connected rectifier and PQ inverter control modes; the voltage outside and capacitive current inside double closed-loop for the off-grid V /f and Droop inverter control modes.Accordingly simulation platform was built on Simulink,and the results show that the system can realize the V2 G technology fast and stably in the grid-connected mode,and can also operate stably and supply power reliably in the island mode. It has practical reference value to the designing and engineering implementation of new style electric vehicle charging station.