摘要
为了提高拓展移相控制的双有源桥DAB(dual active bridge)DC-DC变换器的电压动态响应性能,降低系统的电流应力,利用使电流应力最小的优化相移比与输出电压之间的关系,提出了一种将电压动态矩阵控制DMC(dynamic matrix control)算法与变换器电流应力优化方法相结合的控制算法,并从预测模型、滚动优化和反馈校正3个环节详细介绍了DAB的DMC电压预测控制的具体实现过程。最后,将所提控制方法与电压闭环PI控制的拓展移相电流应力优化算法进行了仿真比较。仿真结果表明:该方法不仅减小了电流应力,而且在变换器启动阶段、输入电压突变和负载突变时大大改善了变换器的电压动态响应性能。
To improve the voltage dynamic response performance of a dual active bridge(DAB)DC-DC converter under extended-phase shift control and reduce the current stress in the system,a novel control algorithm which combines the dynamic matrix control(DMC)algorithm for voltage and the optimal current stress control method for the converter is propo-sed according to the relationship between the optimal shift phase ratios that minimizes the current stress and the output voltage.In addition,the realization process of voltage predictive control of DAB based on DMC is introduced in detail from three aspects,i.e.,prediction model,rolling optimization,and error feedback compensation.Finally,the proposed control method and the traditional optimal current stress control method based on the PI closed-loop voltage control with extended-phase shift control are compared through simulations.Simulation results show that the proposed method can not only reduce the current stress but also greatly improve the voltage dynamic response performance of the DAB converter at its start-up stage and in the case of step change in input voltage and load.
作者
杨向真
陈曦
杜燕
孔令浩
YANG Xiangzhen;CHEN Xi;DU Yan;KONG Linghao(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China;Research Center for Photovoltaic Systems Engineering of Ministry of Education,Hefei University of Technology,Hefei 230009,China)
出处
《电源学报》
CSCD
北大核心
2020年第6期105-114,共10页
Journal of Power Supply
关键词
双有源桥DC-DC变换器
拓展移相
动态矩阵控制
电流应力
动态性能
dual active bridge(DAB)DC-DC converter
extended-phase shift
dynamic matrix control
current stre-ss
dy-namic performance
