双向无线电能传输系统效率优化控制策略研究  

Research on the Overall Efficiency Optimization of the Bidirectional Wireless Power Transfer System

作　　者：刘方 陈凯楠[1] 蒋烨[1] 赵争鸣[1] 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)

机构地区：[1]电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系),北京100084

出　　处：《电工技术学报》2019年第5期891-901,共11页Transactions of China Electrotechnical Society

基　　金：国家国际科技合作专项(2016YFE0102200);台达电力电子科教发展计划项目资助

摘　　要：电动汽车双向无线电能传输系统以其便利性和互动性,可适用于未来车联网。相比单向系统,双向系统控制自由度多,不同自由度的选取和组合会影响系统中变换器和传输线圈损耗的分布及其大小,进而影响系统的整体效率。因此,如何通过多个控制自由度间的协调组合提升系统整体效率,是双向系统控制的关键性问题。该文首先分析了多个控制自由度间组合关系对变换器运行状态和线圈间传输效率的影响,推导了实现变换器优化运行和线圈间传输效率提升的约束条件。在此基础上,针对上述优化运行条件,对系统各部分损耗及整体效率进行了估算,并提出一种实现双向无线电能传输系统效率优化的多自由度组合控制策略。搭建了相应的仿真和实验平台,实验结果验证了理论分析的正确性和所提方法的有效性。与传统控制策略的对比结果表明,所提方法能进一步优化系统运行状态,提升整体效率。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.

关 键 词：双向无线电能传输 电动汽车无线充电 整体效率优化 多自由度控制 

分 类 号：TM72[电气工程—电力系统及自动化]