车辆与电网互动模式下电动汽车充放电控制策略研究

Research on Charging and Discharging Control Strategy of Electric Vehicle in Vehicle to Grid Interactive Mode

为实现车辆与电网互动(V2G)模式下电动汽车与电网间能量的双向流动,以无隔离两级式双向AC/DC变换器为研究对象,分析其工作原理并建立数学模型,制定了前馈解耦双闭环和恒流充放电控制策略,运用空间矢量脉冲宽度调制(SVPWM)技术生成功率开关管的驱动信号,设计了无源阻尼型LCL滤波器。最后,在MATLAB/Simulink中搭建系统仿真模型进行系统仿真及分析,结果表明,所提出的控制策略可实现电动汽车与电网间的双向功率流动。

In order to realize the bidirectional flow of energy between electric vehicles and the power grid in Vehicle to Grid(V2G)mode,this paper analyzed the working principle using the non-isolated two-stage bidirectional AC/DC converter as the research object,a mathematical model was established.The feed forward decoupling double closed-loop,constant current charge and discharge control strategies were formulated.The Space Vector Pulse Width Modulation(SVPWM)technology was utilized to generate the driving signal of the power switch tube,the passive damping LCL filter was designed.Finally,the system simulation model was built in MATLAB/Simulink for system simulation and analysis.The results show that the proposed control strategy can realize the bidirectional power flow between the electric vehicle and the power grid.