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基于DPS的双有源桥DC-DC变换器回流功率优化控制

来源：电工电气发布时间：2024-02-01 13:01 浏览次数：514

基于DPS的双有源桥DC-DC变换器回流功率优化控制

许宇安，张晓虎

(湖南工业大学电气与信息工程学院, 湖南株洲 412007)

摘要：针对双有源桥(DAB)DC-DC变换器进行回流功率优化研究，在运用传统双重移相控制(DPS)进行调制，变压器两侧的输入电压跟输出电压不匹配时，回流功率会显著增大。提出一种双重移相的多目标优化控制方法，对双重移相控制的工作原理进行分析，推导出对应的输出功率和回流功率的关系式，以此搭建数学模型，并基于该模型对回流功率进行优化；以 KKT 作为条件，针对回流功率的最小化问题，解出内外移相角的最优组合；为了迅速改变当前的传输功率，通过虚拟电压补偿方法来实现，从而达到优化系统回流功率的目标；通过 MATLAB/Simulink 仿真对该方案与传统 SPS(单移相控制) 方案、传统 DPS 方案进行对比分析，验证了该方案的有效性及优越性。

关键词： 双有源桥变换器；双重移相；回流功率；优化控制

中图分类号：TP212 文献标识码：A 文章编号：1007-3175(2024)01-0010-06

Optimal Control of Backflow Power of Dual-Active Bridge

DC-DC Converter Based on DPS

XU Yu-an, ZHANG Xiao-hu

（College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007,China）

Abstract: For the research of backflow power optimization of Dual-Active Bridge (DAB) DC-DC converter, when the traditional Dual-Phase Shift (DPS) control method is used for modulation, the backflow power will significantly increase when the input voltage on both sides of the transformer does not match the output voltage. Based on the above problems, a multi-objective optimization control method with dual-phase shifting is proposed in this paper. Firstly, the working principle of the dual phase-shift control is analyzed, and the relationship between the corresponding output power and the reflow power is derived, so as to build a mathematical model, and the reflow power is optimized based on the model. Next, with KKT(Karush-Kuhn-Tucker) as the condition, aiming at the minimization of backflow power, the optimal combination of internal and external phase shift angles is solved. Then, in order to quickly change the current transmission power, the virtual voltage compensation method is used to achieve the goal of optimizing the system backflow power. Finally, the effectiveness and superiority of the scheme are verified by comparing and analyzing the scheme with the traditional SPS(Single-Phase Shift)scheme and the traditional DPS scheme by MATLAB/Simulink simulation.

Key words: dual-active bridge converter; dual-phase shift; backflow power; optimal control

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基于DPS的双有源桥DC-DC变换器回流功率优化控制