Research on charging and discharging control strategy of electric vehicle charging station

• Main Authors: Zhang Li, Zhang Song
• Format: Article
• Language: zho
• Published: National Computer System Engineering Research Institute of China 2018-11-01
• Series: Dianzi Jishu Yingyong
• Subjects: electric vehicle; charging station; energy storage; hierarchical control
• Online Access: http://www.chinaaet.com/article/3000094539

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.