| 引用本文: | 王党树,杨黎康,孙 龙,等.LCL-T谐振型DAB变换器的ITPS调制策略与ZVS性能优化[J].电力系统保护与控制,2026,54(03):12-21.[点击复制] |
| WANG Dangshu,YANG Likang,SUN Long,et al.ITPS modulation strategy and ZVS performance optimization for LCL-T resonant DAB converters[J].Power System Protection and Control,2026,54(03):12-21[点击复制] |
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| 摘要: |
| 为解决传统双有源桥(dual active bridge, DAB)变换器在宽输入电压工况下无法同时实现零回流功率和全局软开关的问题，提出了一种基于LCL-T谐振型DAB变换器的改进三重移相(improved triple-phase-shift, ITPS)调制策略。首先，对LCL-T谐振型DAB变换器的功率传输特性和软开关特性进行分析，推导出不同电压转换比下无回流功率的控制量表达式。然后，利用LCL谐振网络的对称特性和考虑开关管寄生电容影响下的零电压开关(zero voltage switching, ZVS)约束条件，推导出全工况连续、形式统一、计算量小的ITPS调制控制量表达式，并对调制轨迹进行优化。最后，设计了一台1 kW的实验样机进行调制策略有效性的验证。实验结果表明，与传统调制策略相比，ITPS调制策略具有较宽输入电压范围、无回流功率及全局软开关的优势。 |
| 关键词: LCL谐振 双有源桥 宽电压范围 零回流功率 零电压开关 三重移相调制 |
| DOI：10.19783/j.cnki.pspc.250599 |
| 投稿时间：2025-06-04修订日期：2025-08-21 |
| 基金项目:国家重点研发计划重大自然灾害防控与公共安全专项资助(2023YFC3009800) |
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| ITPS modulation strategy and ZVS performance optimization for LCL-T resonant DAB converters |
| WANG Dangshu,YANG Likang,SUN Long,WU Jiaju,JIA Rulin |
| (School of Electrical and Control Engineering, Xi’an University of Science and Technology, Xi’an 710054, China) |
| Abstract: |
| To address the inability of conventional dual active bridge (DAB) converters to simultaneously achieve zero backflow power and global soft switching under wide input voltage variations, an improved triple-phase-shift (ITPS) modulation strategy for LCL-T resonant DAB converters is proposed. First, the power transfer characteristics and soft-switching behaviors of the LCL-T resonant DAB converter are analyzed, deriving the control variable expressions for achieving zero backflow power under different voltage conversion ratios. Subsequently, by leveraging the symmetry of the LCL resonant network and incorporating ZVS constraints considering switching device parasitic capacitances, unified ITPS modulation control expressions are derived that are continuous over the entire operating range, have a uniform form, and require low computational effort, with the modulation trajectories further optimized. Finally, a 1 kW experimental prototype validates the effectiveness of the proposed modulation strategy. Experimental results demonstrate that the ITPS modulation strategy achieves a wider input voltage range, zero backflow power, and global soft-switching capability, compared to conventional modulation strategies. |
| Key words: LCL resonant dual active bridge (DAB) wide voltage range zero backflow power zero-voltage switching (ZVS) triple-phase-shift modulation |
