基于优化移相的双有源串联谐振变换器前馈控制策略

doi:10.19595/j.cnki.1000-6753.tces.211774

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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。

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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

Abstract：The dual-active-bridge series resonant converter (DBSRC) in traditional single-phase- shift 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.

Key words： Dual-active-bridge series resonant converter (DBSRC) no-unit voltage gain multi- phase-shift modulation magnitude optimization power feedforward control

收稿日期: 2021-11-05

PACS:

TM46

基金资助:北京市自然科学基金资助项目（L201005）

通讯作者: 赵鲁男,1984年生,副研究员,硕士生导师,研究方向为大功率变流器及高性能电机牵引控制技术。E-mail: zhaolu@mail.iee.ac.cn

作者简介: 范恩泽男,1994年生,博士研究生,研究方向为大功率电力电子变换器及其控制。E-mail: fanenze@mail.iee.ac.cn

引用本文:

范恩泽, 李耀华, 葛琼璇, 赵鲁. 基于优化移相的双有源串联谐振变换器前馈控制策略[J]. 电工技术学报, 2022, 37(20): 5324-5333. Fan Enze, Li Yaohua, Ge Qiongxuan, Zhao Lu. Feedforward Control Strategy of Dual Active Bridge Series Resonant Converter Based on Optimized Phase Shift. Transactions of China Electrotechnical Society, 2022, 37(20): 5324-5333.

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