具有极低输入电流纹波的电流源型双有源桥DC-DC变换器  

A current-fed dual active bridge converter with rather low input current ripples

作　　者：倪永亮[1] 沙德尚[2] 王孙博 李晓聪[1] NI Yong-liang;SHA De-shang;WANG Sun-bo;LI Xiao-cong(Department of Information and Control,China North Vehicle Research Institute, Beijing 100072, China;School of Automation, Beijing Institute of Technology, Beijing 100081, China)

机构地区：[1]中国北方车辆研究所信息与控制技术部,北京100072 [2]北京理工大学自动化学院,北京100081

出　　处：《电工电能新技术》2019年第7期35-46,共12页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金项目(51577012)

摘　　要：针对新能源发电如光伏或者燃料电池的功率调节器电流输入纹波问题,本文提出了一种新颖的电流源型混合DAB拓扑。在稳态运行过程中输入侧开关管占空比始终为50%,在交错的作用下输入电流纹波极小。采用所提出的占空比补偿策略,可以进一步增加开关管的软开关范围。同时电压反馈采用陷波滤波器,减少了单相逆变器负载时的低频输入电流纹波。文中给出了拓扑模态分析、工作原理、ZVS条件和参数设计的原则。采用所提出的控制策略,所有功率器件都可以实现零电压(ZVS)开通,可以增加软开关的范围,同时实现高效率的功率变换。仿真结果和样机实验验证了所提出的变换器和控制策略的有效性。In this paper, a novel current fed hybrid dual active bridge DC-DC converter is proposed, which is suit- able to be used as power condition systems for fuel cell or PV with very low input current ripples. The high frequen- cy input current ripple can be reduced to minimum because the input side switches are always switched at 50% duty cycles in spite of the fuel cell voltage and the load variation. The ZVS range can be extended with the proposed du- ty cycle extension. To minimize the double-line frequency as the load is single-phase inverter, a notch filter is add- ed in the voltage feedback loop. The mode analysis, the operation principle, ZVS conditions and parameter design are given in this paper. In most working conditions, ZVS can be achieved while the input current ripple including both the high frequency and low frequency ones is low. The conversion efficiency is high. The effectiveness of the proposed converter employing the proposed control strategy is verified by simulation and experimental results of a prototype.

关 键 词：DC-DC变换器 功率调节器 零电压开关 电流纹波 

分 类 号：TM46[电气工程—电器]