基于直流微电网的电动汽车可逆充电机的研究

摘要

In order to fully use the bidirectional energy flow characteristics of the electric vehicle charging-storage-discharging station and the connected distribution network,combined with super capacitor power density high response speed and battery of high energy density,hybrid energy storage charger topology,used on micro grid electric vehicles reversible charger is proposed.Modeling and control strategies of electric vehicle charger reversible is presented.The simulation results show that,the reversible charger can realize bidirectional energy transmission,and stability of the micro grid DC bus voltage,improve the micro grid power efficiency,while avoiding the battery charge and discharge frequently,prolonging the service life of the battery.%为充分发挥电动汽车与微电网的能量双向流动特性,结合超级电容器功率密度高响应速度快和蓄电池的能量密度高的特点,提出混合储能的充电机拓扑结构,用于基于微电网的电动汽车可逆充电机.对电动汽车可逆充电机进行建模,并提出相应的控制策略研究.经过仿真实验证明,所提出的可逆充电机能实现能量双向传输,稳定了微电网直流母线电压,提高了微电网的用电效率,同时避免了蓄电池频繁充放电,延长了电池使用寿命.