| 引用本文: | 王 祺,张泽轲,王春花.考虑不同优化指标的双有源桥变换器全局优化控制[J].电力系统保护与控制,2025,53(05):113-122.[点击复制] |
| WANG Qi,ZHANG Zeke,WANG Chunhua.Global optimal control of a dual active bridge converter considering different optimization indices[J].Power System Protection and Control,2025,53(05):113-122[点击复制] |
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| 摘要: |
| 双有源桥(dual-active-bridge, DAB)变换器在能量双向传输的场合扮演着关键的角色，其中单移相控制是其最典型的控制方式。然而，当DAB变换器的输入电压和输出电压不匹配时会产生较大的回流功率，同时会增大电流应力，轻载时无法实现全部开关管的零电压开通(zero-voltage-switching, ZVS)。针对传统单移相控制在电压不匹配运行时效率降低的问题，提出一种基于双重移相(dual-phase-shift, DPS)控制的全功率范围内保证全部开关管实现ZVS的最小回流功率优化策略，以提高变换器在宽电压调节比下的效率。首先，综合考虑功率的传输特性、电压调节比以及最小回流功率、最小电流应力、全ZVS三者之间的耦合关系，研究全部开关管实现ZVS的功率范围。然后，根据给定的约束条件，通过分段优化的方法，得到全局最优解。最后，搭建实验平台验证所提优化策略在电压不匹配运行条件下可以使DAB变换器的全部开关管在全功率范围内均能实现ZVS，同时减小了回流功率。 |
| 关键词: 双有源桥变换器 回流功率 电流应力 软开关 双重移相控制 |
| DOI：10.19783/j.cnki.pspc.240735 |
| 投稿时间：2024-06-14修订日期：2024-11-26 |
| 基金项目:湖北省重点实验室项目资助(MPL2024ORG003) |
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| Global optimal control of a dual active bridge converter considering different optimization indices |
| WANG Qi1,2,ZHANG Zeke1,WANG Chunhua2 |
| (1. School of Electric Power, Civil Engineering and Architecture, Shanxi University, Taiyuan 030031, China;
2. School of Mathematics and Statistics, Central China Normal University, Wuhan 430079, China) |
| Abstract: |
| The dual active-bridge (DAB) converter plays a key role in bidirectional energy transfer applications, with single-phase-shift (SPS) control being the most common control mode. However, when the input and output voltages of the DAB converter are mismatched, significant circulating power is generated leading to higher current stress, while zero-voltage-switching (ZVS) cannot be achieved for all switches in light load conditions. To address the efficiency degradation of traditional SPS control when there are voltage mismatches, an optimized dual-phase-shift (DPS) control strategy is proposed. This ensures minimum backflow power of all switching tubes and ZVS in the full power range, thus improving the efficiency of the converter with a wide voltage regulation ratio. First, considering the power transfer characteristics, voltage regulation ratio, coupling relationship between minimum backflow power, minimum current stress and full ZVS, the power range of all switches to achieve ZVS is studied. Then, from the given constraints, a global optimal solution is obtained by segmented optimization. Finally, an experimental platform is set up to verify that, the proposed optimization strategy can achieve ZVS of all switches in the full power range when there are voltage mismatches, and at the same time, effectively reduce the backflow power. |
| Key words: dual-active-bridge converter backflow power current stress zero-voltage-switching dual-phase-shift control |
