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针对能源互联网双有源桥变换器（dual active bridge,DAB）存在的电流应力大与动态性能欠佳问题,提出一种基于拓展移相的DAB变换器稳态与动态性能优化策略。采用拉格朗日乘数法构建模型，以降低输入输出电压不匹配时的电流应力,对比不同运行模式优化后的电流应力,确保在可行域内峰值电流最小；针对DAB变换器高频特性与EPS调制的功率耦合关系，引入改进动态矩阵控制（dynamic matrix contro,DMC）算法改善电压波动与动态响应；通过搭建300 W的DAB变换器样机,验证了基于拓展移相的DAB变换器动态与稳态性能优化策略的优化效果。结果表明：拓展移相调制下的DAB变换器电流应力整体降低12.1%；改进DMC算法有效改善了变换器的动态响应性能，与传统PI控制相比，负载突变时动态响应时间从23 ms缩短至9 ms，电压波动从3.5 V减小至1.0 V,验证了该优化策略的有效性。
Abstract：To address the issues of high current stress and unsatisfactory dynamic performance in dual active bridge(DAB) converters for the energy internet, a steady-state and dynamic performance optimization strategy for DAB converters based on extended phase shift(EPS) is proposed. A model is established using the Lagrange multiplier method to reduce current stress under input-output voltage mismatch. Optimized current stresses in different operating modes are compared to ensure minimum peak current within the feasible region. Considering the high-frequency characteristics of DAB converters and the power coupling effect of EPS modulation, an improved dynamic matrix control(DMC) algorithm is introduced to reduce voltage fluctuations and enhance dynamic response. A 300 W DAB prototype is built to verify the effectiveness of the proposed optimization strategy. Results show that the overall current stress of the DAB converter is reduced by 12.1% under EPS modulation. The improved DMC algorithm effectively improves dynamic response: compared with conventional PI control, the dynamic response time under load step change is shortened from 23 ms to 9 ms, and the voltage fluctuation is reduced from 3.5 V to 1.0 V, which validates the effectiveness of the proposed strategy.
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基本信息:
中图分类号:TM46
引用信息:
[1]岳改丽,李萍,杜光辉,等.基于拓展移相的DAB变换器动态与稳态性能优化策略[J].天津工业大学学报().
基金信息:
国家自然科学基金项目(52177056)
2026-05-11
2026-05-11
2026-05-11