Research on the Overall Efficiency Optimization of the Bidirectional Wireless Power Transfer System
Liu Fang, Chen Kainan, Jiang Ye, Zhao Zhengming
State Key Laboratory of Control and Simulation of Power System and Generation Equipments Department of Electrical Engineering Tsinghua University Beijing 100084 China
Abstract：Due to the advantages of convenience and interactivity, bidirectional wireless power transfer (BWPT) systems are available for the vehicle-to-grid (V2G) application in the future. Compared to the traditional unidirectional wireless power transfer system, there are more controllable variables for the BWPT system, and different combinations of those variables will influence the distribution of the losses in the system. Therefore, the optimal combination of those controllable variables is necessary for optimal operation of the system and the improvement of the overall efficiency. This paper investigates the influence of the controllable variables on the operating states of the BWPT system. Firstly, the influence of the variables on the operating states of the converters and the transfer efficiency between the coils was studied in details, and the constraints of the variables for the optimal operation of the system were obtained. Then, the losses and the overall efficiency were estimated and a control scheme to improve the efficiency was proposed. Finally, simulation and experiments were made to verify the validity of the proposed scheme. Compared with the traditional control scheme, the proposed scheme is helpful for the optimal operation of the BWPT system, and it can obviously improve the system’s overall efficiency.
刘方,陈凯楠,蒋烨,赵争鸣. 双向无线电能传输系统效率优化控制策略研究[J]. 电工技术学报, 2019, 34(5): 891-901.
Liu Fang, Chen Kainan, Jiang Ye, Zhao Zhengming. Research on the Overall Efficiency Optimization of the Bidirectional Wireless Power Transfer System. Transactions of China Electrotechnical Society, 2019, 34(5): 891-901.
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2019, Vol. 34 
