基于优化移相的双有源串联谐振变换器前馈控制策略  

Feedforward Control Strategy of Dual Active Bridge Series Resonant Converter Based on Optimized Phase Shift

作　　者：范恩泽 李耀华[1,2] 葛琼璇 赵鲁[1] Fan Enze;Li Yaohua;Ge Qiongxuan;Zhao Lu(Key Laboratory of Power Electronics and Electric Drive Institute of Electrical Engineering Chinese Academy of Sciences,Beijing 100190 China;University of Chinese Academy of Sciences,Beijing 100049 China)

机构地区：[1]中国科学院电力电子与电气驱动重点实验室(中国科学院电工研究所),北京100190 [2]中国科学院大学,北京100049

出　　处：《电工技术学报》2022年第20期5324-5333,共10页Transactions of China Electrotechnical Society

基　　金：北京市自然科学基金资助项目(L201005)。

摘　　要：传统的基于单移相调制的双有源串联谐振变换器(DBSRC)在非单位电压增益下循环功率大,导致谐振电流幅值大。针对此问题,采用基波模型分析DBSRC在多重移相调制下的传输功率和谐振电流特性,利用拉格朗日函数对谐振电流幅值进行优化解析,得到基于谐振电流幅值优化的多重移相调制策略。理论结果表明,优化调制可以显著降低DBSRC在中轻载下的谐振电流大小。基于优化移相的调制方法,为了提高变换器对负载变化的动态响应,提出一种输出功率前馈的电压闭环控制策略。最后,通过仿真和实验验证了优化移相调制和输出功率前馈控制策略的可行性和有效性。The dual-active-bridge series resonant converter(DBSRC)in traditional single-phaseshift modulation under no-unit voltage gain has high backflow power,resulting in high RMS of the resonant current.For this problem,the DBSRC’s characteristics of the transmission power and the resonant current in multi-phase-shift modulation are analyzed.The multi-phase-shift modulation strategy is derived based on the optimization of the resonant current using the Lagrangian function.It is indicated that the optimized-phase-shift modulation can reduce the magnitude of the resonant current in light and medium loads.Based on optimized-phase-shift modulation method,a voltage closed-loop control strategy with output power feedforward is delivered.Finally,simulation and experimental results verify the feasibility and effectiveness of the optimized modulation and the feedforward control strategy.

关 键 词：双有源串联谐振变换器(DBSRC) 非单位电压增益 多重移相调制 幅值优化 功率前馈控制 

分 类 号：TM46[电气工程—电器]