摘要
该文提出一种两相交错并联三电平双向DC-DC变换器功率均衡解耦控制策略,并有效地减少了电流传感器的使用。通过对变换器拓扑工作原理的分析,得出两相交错三电平拓扑的等效两电平分析方法。在此基础上,提出基于总电流分时倍频采样功率均衡解耦控制策略,使变换器的电压调节与相间电流均衡控制实现了完全解耦。此外,将常规均衡控制所需的四路电流采样,减少为两路,达到了简化控制结构的目的。建立基于等效拓扑下的小信号模型,利用该模型对所提方案进行理论验证,并给出控制器参数的具体设计方案。最后通过小功率物理仿真实验对所提控制策略进行了有效验证。
A decoupled power-balancing control strategy for the two-phase interleaved parallel three-level bidirectional DC-DC converter is proposed in this paper,and the use of current sensors is effectively reduced.By analyzing the working principle of topology,an equivalent two-level analysis method under the two-phase interleaved parallel topology is obtained.On this basis,a decoupled power-balancing control strategy based on total current time-sharing and frequency-doubling sampling is proposed to fully decouple the voltage regulation of the converter from the current-balancing control between phases.In addition,the four channels of current sampling required by the conventional balance control are reduced to two channels,which simplifies the control structure.A small signal model based on the equivalent topology is established,and the specific design scheme of the controller parameters is given.Finally,the proposed control strategy is verified by a physical experiment.
作者
樊启高
卢禹卓
毕恺韬
安群涛
朱一昕
Fan Qigao;Lu Yuzhuo;Bi Kaitao;An Quntao;Zhu Yixin(School of Internet of things Engineering Jiangnan University,Wuxi 214122 China;School of Electrical Engineering and Automation Harbin Institute of Technology,Harbin 150001 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2022年第14期3654-3664,共11页
Transactions of China Electrotechnical Society
基金
中国博士后科学基金(2020M681692)
江苏省自然科学基金(BK20200623)资助项目。
关键词
交错并联
三电平双向直流变换器
功率均衡解耦控制
倍频采样策略
Interleaved parallel
three-level bidirectional DC converter
decoupled powerbalancing control
frequency-doubling sampling strategy
