双有源桥DC-DC变换器的最小回流功率控制研究  

Research on Minimum Return Power Control of DualActive Bridge DC-DC Converter

作　　者：孙雨晴 陈卓[1] 刘柏霖 郝正航[1] SUN Yu-qing;CHEN Zhuo;LIU Bo-lin;HAO Zheng-hang(College of Electrical Engineering,Guizhou University,Guiyang Guizhou 550025,China)

机构地区：[1]贵州大学电气工程学院,贵州贵阳550025

出　　处：《计算机仿真》2023年第6期96-101,共6页Computer Simulation

基　　金：国家自然科学基金项目(51867007)。

摘　　要：针对DAB中存在的功率回流现象并以降低系统回流功率为目标,提出了一种基于EPS控制的回流功率优化控制策略。上述策略通过分析DAB的工作原理并运用KKT条件将约束条件转换为约束函数,然后建立拉格朗日多项式函数求极值,从而求得回流功率的最优解。同时,通过引入虚拟电压分量对变换器的传输功率进行实时估算与补偿,设计了一种直接功率补偿的控制方法,实现系统在突变情况下的快速响应能力。最后,仿真结果表明了所提优化控制策略优化回流功率的同时,也降低DAB的电流应力并改善其动态响应特性。Aiming at the power recirculation phenomenon in DAB and aiming to reduce the system recirculation power,this paper proposes a return power optimization control strategy based on EPS control.Based on this strategy,we analyzed the working principle of DAB and used the KKT condition to convert the constraint condition into a con-straint function,and then established a Lagrangian polynomial function to find the extremum,so as to obtain the opti-mal solution of the reflux power.At the same time,by introducing virtual voltage components to estimate and compen-sate the transmission power of the converter in real time,a direct power compensation control method was designed to realize the rapid response capability of the system under sudden changes.Finally,the simulation results show that the proposed optimized control strategy optimizes the return power while also reducing the DAB's current stress and im-proving its dynamic response characteristics.

关 键 词：拉格朗日乘数法 移相控制 回流功率优化 动态响应 

分 类 号：TM46[电气工程—电器]