双重移相控制下双有源桥变换器最小回流功率全局优化控制  

Global Optimization Control of Minimum Backflow Power for Dual-active-bridge Converters Under Dual-phase-shift Control

作　　者：王祺[1] 张泽轲 刘彬 韩栋梁 赵慕欣 郭杰帅 李世翔 郭一甫 WANG Qi;ZHANG Zeke;LIU Bin;HAN Dongliang;ZHAO Muxin;GUO Jieshuai;LI Shixiang;GUO Yifu(School of Electric Power,Civil Engineering and Architecture,Shanxi University,Taiyuan 030006,Shanxi Province,China;Engineering Training Center,Taiyuan University,Taiyuan 030032,Shanxi Province,China)

机构地区：[1]山西大学电力与建筑学院,山西省太原市030006 [2]太原学院工程训练中心,山西省太原市030032

出　　处：《电网技术》2024年第9期3921-3930,I0097,I0098,共12页Power System Technology

基　　金：2023年可再生能源并网全国重点实验室开放基金项目(NYB51202301637);教育部重点实验室开放课题(MPSS2023-02);山西省应用基础研究计划青年项目(20210302124553)。

摘　　要：双有源桥(dual-active-bridge,DAB)DC-DC变换器通常用于能量转换。然而,传统的单移相控制使得变换器在输入电压和输出电压不匹配时产生较大的回流功率,特别是轻载情况下该现象更为严重。现有基于双重移相控制(dualphase-shift,DPS)的回流功率优化策略,尚未考虑全功率范围内的回流功率,也缺乏对所有工作模式下最小回流功率的研究。为此,该文提出一种考虑全功率范围、全工作模式的DPS最优控制策略。首先,详细阐述回流功率产生的机理,建立了不同工作模式的传输功率和回流功率数学模型。然后,计及不同工作模式的功率限值,将DPS控制的传输功率分成不同的功率区。在此基础上,提出了一种基于最小回流功率的DPS最优控制策略,通过分析不同工作模式下的优化路径获得各个功率区的最优移相角,进而提升DAB变换器的传输效率。最后,搭建实验平台验证所提最小回流功率控制策略的可行性。Dual-active-bridge(DAB)DC-DC converters are commonly used for energy conversion.However,traditional single-phase-shift control causes the converter to generate significant backflow power when the input and output voltage do not match,especially under light load conditions.The existing optimization strategy for backflow power based on dual-phase-shift(DPS)control has yet to consider the backflow power in the full power range,and there is a lack of research on the minimum backflow power in all operating modes.Therefore,this article proposes an optimal control strategy for DPS that considers full power range and full operating mode.Firstly,the mechanism of backflow power generation was elaborated in detail,and mathematical models for transmission and backflow power under different operating modes were established.Then,considering the power limits of different operating modes,the transmission power controlled by DPS is divided into different power zones.On this basis,a DPS optimal control strategy based on minimum backflow power is proposed,which obtains the optimal phase shift angle for each power region by analyzing the optimization trajectories under different operating modes,thereby improving the efficiency of the converter.Finally,an experimental platform was established to verify the feasibility of the proposed minimum backflow power control strategy.

关 键 词：双有源桥变换器 双重移相控制 最小回流功率 全功率范围 全工作模式 

分 类 号：TM721[电气工程—电力系统及自动化]