摘要
针对电动汽车双向无线充电(BWPT)场景,建立了非对称参数下的系统功率及效率模型,并提出了一种适用于BWPT的系统拓扑,在双向全桥和双边LCC的基础上,加入额外的一级四开关管双向DC/DC电路。并在此基础上提出了电能双向无线传输时的恒流与最大效率追踪协同控制方法。通过控制逆变器移相角满足充电和馈电时的恒流输出要求,并通过改变DC/DC变换器的占空比实现对系统最大效率的主动跟踪。然后进行了BWPT的仿真实验,仿真结果证明系统在负载变化时能够在恒流的同时保持在最大效率点运行。最后设计了BWPT系统实验,实验结果证明了所提拓扑的可行性和协同控制策略的有效性。
Aiming at the bidirectional wireless power transfer(BWPT) scenario of electric vehicles,a system power and efficiency models under asymmetric parameters is established,and a system topology suitable for BWPT is proposed.Based on bilateral full bridge and bilateral LCC,an additional four-switch bidirectional DC/DC circuit is added.On the basis,a cooperative control method of constant current and maximum efficiency tracking for BWPT is proposed.By controlling the inverter phase shift angle to meet the constant current output requirements during charging and discharging,and by changing the duty cycle of the DC/DC converter to achieve active tracking of the maximum efficiency point of the system.Then the simulation experiment of BWPT is carried out.The simulation results prove that the system can operate at the maximum efficiency point while maintaining a constant current output when the load changes.Finally,a BWPT system experiment is designed,and the experimental results prove the feasibility of the proposed topology and the effectiveness of the cooperative control strategy.
作者
魏辰阳
魏斌
蒋成
吴晓康
WEI Chen-yang;WEI Bin;JIANG Cheng;WU Xiao-kang(China Electric Power Research Institute,Beijing 100192,China)
出处
《电力电子技术》
北大核心
2023年第1期101-104,113,共5页
Power Electronics
基金
国家电网公司总部科技项目(5400-202211163A-1-1-ZN)。
关键词
双向无线充电
协同控制
最大效率跟踪
bidirectional wireless power transfer
cooperative control
maximum efficiency tracking
