摘要
介绍了光储式电动汽车充电站的结构和运行模式,提出一种电动汽车充电站控制策略,其核心在于根据光伏系统最大功率输出和储能电池的荷电状态来确定充电站的运行模式,实现光伏发电、储能系统充放电、充电站需求及并网的协调运行。其中储能端的双向DC/DC变换器采用电压电流双闭环控制,为了避免蓄电池频繁充放电,采用母线电压分层控制方法;并网侧的DC/AC变换器采用电压外环、电感电流内环的双环控制。实验结果表明,所采用的控制策略能使电动汽车充电站在各种运行模式之间有效地切换,同时维持系统的直流母线电压平衡,验证了系统控制策略的有效性。
The structure and operation mode of electric vehicle charging station of optical storage are introduced.Following this,the control strategy of electric vehicle charging station is proposed,which determines the operation mode of charging station depending on maximum power output of PV system and state of charge of battery,so that the coordinated control of PV power generation,charging and discharging of energy storage system,charging and discharging station requirements and grid connection is realized.For the bi-directional DC-DC converter of energy storage end,the voltage and current double closed-loop control method is adopted,and the bus voltage is layered to avoid the battery charging and discharging frequently.For the DC-AC grid side converter,voltage outer loop and inductance current inner double loop control are utilized.The experimental results show that the control strategy should enable electric vehicle charging station to switch between various operation modes effectively and maintain the DC bus voltage balance of system,and verify the effectiveness of the control strategy.
作者
张莉
张松
Zhang Li;Zhang Song(School of Electrical Engineering,Dalian University of Technology,Dalian 116024,China)
出处
《电子技术应用》
2018年第11期150-153,157,共5页
Application of Electronic Technique
基金
国家自然科学基金(51577022)
关键词
电动汽车
充电站
储能
分层控制
electric vehicle
charging station
energy storage
hierarchical control
