| 引用本文: | 赵郅毅,荆 龙,续文政,吴学智,张东升.基于双重移相控制的双有源桥全局最小电流应力控制策略[J].电力系统保护与控制,2025,53(24):78-88.[点击复制] |
| ZHAO Zhiyi,JING Long,XU Wenzheng,WU Xuezhi,ZHANG Dongsheng.Global minimum current stress control strategy for dual-active-bridge converters based on dual phase-shift control[J].Power System Protection and Control,2025,53(24):78-88[点击复制] |
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| 摘要: |
| 双有源桥(dual-active-bridge, DAB)变换器在两侧电压不匹配工况下，电流应力急剧增加，过大的电流应力不仅增加了DAB开关器件的选型难度，也降低了DAB的效率与运行安全性。针对此问题，提出了基于双重移相(dual phase shift, DPS)控制的全局最小电流应力控制策略。首先分析了DPS控制下DAB的移相比可行域分区，并基于各区域内传输功率与电流应力的解析表达式，建立了全功率范围DAB电流应力优化模型。针对多区域且非凸的电流应力优化问题，先基于遗传算法求解结果分析全局最优解的区域判据，再通过卡罗需-库恩-塔克(Karush-Kuhn-Tucker, KKT)条件法求得全局最优解的解析表达式，进而提出了基于DPS的DAB最小电流应力控制策略。随后，对优化控制下DAB变换器的软开关特性进行了分析。最后，通过实验验证了理论分析与所提控制策略的正确性和有效性。 |
| 关键词: 双有源桥变换器 双重移相 电流应力 遗传算法 KKT条件法 |
| DOI：10.19783/j.cnki.pspc.250083 |
| 投稿时间：2025-01-20修订日期：2025-04-21 |
| 基金项目:国家重点研发计划项目资助(2023YFC3807000) |
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| Global minimum current stress control strategy for dual-active-bridge converters based on dual phase-shift control |
| ZHAO Zhiyi,JING Long,XU Wenzheng,WU Xuezhi,ZHANG Dongsheng |
| (National Active Distribution Network Technology Research Center, Beijing Jiaotong University, Beijing 100044, China) |
| Abstract: |
| Current stresses in dual-active-bridge (DAB) converters increase rapidly in the event of voltage mismatch between the two sides. Excessive current stress not only complicates the selection of switching devices, but also reduces the efficiency and operational safety of the DAB. To address this issue, a global minimum current stress control strategy based on dual phase-shift (DPS) control is proposed. First, the feasible region of the phase-shift pairs under DPS control is analyzed. Based on the analytical expressions of transmission power and current stress in each region, an optimization model for minimizing DAB current stress over the full power range is established. For the multi-region and non-convex current stress optimization problem, the global optimal solution region is first identified by analyzing the results obtained from a genetic algorithm. Then, using the KKT conditions, an analytical expression for the global optimal solution is derived, leading to the proposed DPS-based minimum current stress control strategy for DAB converters. Subsequently, the soft-switching characteristics of the DAB under the optimized control are analyzed. Finally, the correctness and effectiveness of the theoretical analysis and the proposed control strategy are verified through experiments. |
| Key words: dual-active-bridge converter dual phase shift current stress genetic algorithm KKT conditions |
