| 引用本文: | 孙标广,李静争,邓旭哲.双重移相控制下的双向全桥DC-DC变换器最小电流应力分段优化控制[J].电力系统保护与控制,2023,51(20):107-118. |
| SUN Biaoguang,LI Jingzheng,DENG Xuzhe.Optimal control of minimum current stress in a dual-active-bridge DC-DC converter under dual phase shift control[J].Power System Protection and Control,2023,51(20):107-118 |
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| 摘要: |
| 为了减小双向全桥(dual-active-bridge, DAB)DC-DC变换器的电流应力，提升变换器的效率，提出了一种DAB变换器在双重移相控制下的电流应力分段优化控制策略。该策略首先分析了DAB变换器的结构及其功率特性，推导得到了电流应力与传输功率、移相角之间的关系。然后针对输入输出电压不匹配的情况，对DAB变换器的电流应力进行了分段优化，通过将传输功率分段得到了DAB变换器在不同传输功率范围下的最优移相角。将所提控制策略与传统双重移相控制策略对比分析，发现所提控制策略具有更小的电流应力和回流功率，减少了变换器的导通损耗，提升了变换器的效率。当负载发生突变时，DAB变换器的动态性能得到了大幅提升。最后基于所提控制策略搭建了实验样机，实验结果验证了所提控制策略的正确性和有效性。 |
| 关键词: 双向全桥DC-DC变换器 双重移相控制 电流应力 回流功率 |
| DOI：10.19783/j.cnki.pspc.230247 |
| 分类号: |
| 基金项目:国家自然科学基金项目资助(U1804143) |
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| Optimal control of minimum current stress in a dual-active-bridge DC-DC converter under dual phase shift control |
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SUN Biaoguang1, 2, LI Jingzheng1, 2, DENG Xuzhe1, 2
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1. School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454003, China;
2. Henan Key Laboratory of Intelligent Detection and Control of Coal Mine Equipment, Jiaozuo 454003, China
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| Abstract: |
| To reduce the current stress of a dual-active-bridge (DAB) DC-DC converter and improve its efficiency, an optimal control strategy for current stress segmentation of the DAB converter under double phase shift control is proposed. The strategy first analyses the structure of the DAB converter and its power characteristics, and derives the relationship between current stress and transmission power and phase shift angle. Then, the current stress of the DAB converter is optimized in segments for the case of mismatched input and output voltages, and the optimal phase shift angle of the DAB converter is obtained for different transmission power ranges by segmenting the transmission power. The proposed control strategy is analyzed and compared with conventional double phase shift control strategy, and it is found that the proposed control strategy has smaller current stress and return power. This reduces the conduction loss of the converter and improves the efficiency of the converter. The dynamic performance of the DAB converter is greatly improved when the load changes abruptly. Finally, an experimental prototype is built based on the proposed control strategy, and the experimental results verify the correctness and effectiveness of the proposed control strategy. |
| Key words: dual active bridge DC-DC converter dual phase shift control current stress backflow power |
