基于新扩展移相双有源全桥变换器降压-升压模式下电流应力优化  

Current Stress Optimization in Buck-Boost Mode Based onNew Extended Phase-Shift Dual Active Full-Bridge Converter

作　　者：陶海军[1,2] 王宏祎 杨乃通 TAO Haijun;WANG Hongyi;YANG Naitong(School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454003,Henan,China;Henan International Joint Laboratory of Direct Drive and Control of Intelligent Equipment,Jiaozuo 454003,Henan,China)

机构地区：[1]河南理工大学电气工程与自动化学院,河南焦作454003 [2]河南省智能装备直驱技术与控制国际联合实验室,河南焦作454003

出　　处：《上海交通大学学报》2024年第10期1585-1595,共11页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金(U1804143);河南省科技攻关项目(222102220014);河南省高校基本科研业务费专项资金资助(NSFRF210409)。

摘　　要：为降低双有源全桥变换器在降压-升压模式下的电流应力,提出一种基于新扩展移相调制的电流应力优化控制策略.首先,将变压器两端输出高电平电压之间移相量定义为外移相角,再对比分析降压-升压模式下内移相角在变压器不同侧时变换器的工作特性,根据移相角之间的关系划分为3种工作模态,得到电流应力表达式和功率模型.然后,对比分析得到优化工作模式,利用拉格朗日乘数法算法获取电流应力最优的相移组合.最后,搭建实验平台在降压-升压模式下对变换器进行验证,实验结果表明电流应力优化控制策略显著降低变换器在降压-升压模式下的电流应力.To reduce the current stress of dual active full-bridge converters in the buck-boost mode,a current stress optimization control strategy based on new extended-phase-shift modulation is proposed.First,the phase shift between the output high-level voltages at both ends of the transformer is defined as the external phase shift angle.Then,the working characteristics of the converter are compared and analyzed when the internal phase shift angle is on different sides of the transformer in the voltage buck-boost mode.According to the relationship between the phase shift angles,working modes are divided into three types,and the current stress expression and power model are obtained.Moreover,the improved working mode is obtained by comparative analysis,and the optimal phase shift combination of current stress is obtained by using Lagrange multipler method algorithm.Finally,an experimental platform is established to verify the converter in the buck-boost mode.The experimental results show that the current stress optimization control strategy significantly reduces the current stress of the converter in the buck-boost mode.

关 键 词：双有源全桥 新扩展移相 降压-升压模式 电流应力优化 

分 类 号：TM464[电气工程—电器]