感应电能传输系统能量双向传输切换控制策略研究  

Switching control strategy of energy transmission of bidirectional inductive power transfer system

作　　者：姜龙斌 史黎明[1,2] 殷正刚 JIANG Long-bin;SHI Li-ming;YIN Zheng-gang(Key Laboratory of Power Electronics and Electric Drive,Chinese Academy of Sciences,Beijing 100190,China;Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院电力电子与电气驱动重点实验室,北京100190 [2]中国科学院电工研究所,北京100190 [3]中国科学院大学,北京100049

出　　处：《电工电能新技术》2020年第11期1-8,共8页Advanced Technology of Electrical Engineering and Energy

基　　金：国家重点研发计划(2017YFB1201003-09);北京市自然科学基金资助项目(3184060)。

摘　　要：交通车辆的双向感应电能传输系统(Bidirectional Inductive Power Transfer,BIPT)能够将车辆制动能量回馈至原边侧,大幅降低车辆能耗。在原副边无通讯且无检测线圈的情况下,现有的正反向能量传输切换方法是副边变流器输出电压的移相角不变,其相对于电流的相位逐渐反相,该方法存在副边变流器功率因数过低和副边线圈电流振荡的问题。本文提出一种采用副边线圈电流跟踪控制的策略,通过副边线圈电流过零信号来控制输出电压的频率和相位,切换过程中,副边变流器输出电压的移相角先减小到零、然后输出电压立即反相、移相角逐渐增加,从而实现切换控制。同时,由副边变流器输出电压移相角的正负来控制系统传输能量的方向、移相角的大小控制系统传输能量的大小。结果表明,与现有切换方法相比,所提切换策略能至少降低副边线圈电流波动率9%,副边变流器的功率因数得到大幅度提高。BIPT(bidirectional inductive power transfer)system for traffic vehicles can feedback the braking energy of vehicles to the primary side and reduce the energy consumption of vehicles.In the case that there are no communication and no detection coil between the primary and secondary side,the existing energy transmission switching method is that the phase shift angle of the output voltage of the secondary side converter is unchanged,and its phase with respect to its current is gradually reversed.There are problems that the power factor of the secondary side converter is too low and the secondary coil current oscillates.In this paper,a switching control strategy of energy transmission state is proposed,in which the coil current tracking control is used and the phase-shift angle of the output voltage of the secondary converter is first reduced to zero and then the output voltage is immediately reversed and the phase-shift angle is gradually increased.The secondary side controller controls the frequency and phase of the output AC voltage of the secondary side converter according to the zero crossing signal of the secondary side coil current.The positive and negative phase-shifting angle of the output AC voltage of the secondary converter controls the direction of energy transmission of the system,and the phase-shifting angle controls the amount of energy transmission of the system.The experimental results show that,compared with the existing switching methods,the proposed switching strategy can reduce the current fluctuation rate of the secondary coil by at least 9%and improve the power factor of the AC output end of the secondary converter by 0.85.

关 键 词：感应电能传输 双向能量传输 切换策略 电流振荡 

分 类 号：TM724[电气工程—电力系统及自动化]