摘要
输入串联输出并联-双有源电桥(ISOP-DAB)变换器多应用于大功率高电压场合,为降低ISOP-DAB变换器的电流应力并提高系统的动态性能,本文提出一种基于扩展移相调制混合优化控制方法。首先分析在扩展移相下变换器的工作模式和功率模型,通过拉格朗日优化算法获取电流应力最优的相移组合,并结合虚拟电压均衡控制方案,以应对负载突变或输入电压扰动状态,同时结合变换器的结构特征使用输入电压均值完成模块间功率的动态平衡。最后,将混合优化控制方法、基于单移相的虚拟功率控制和传统的扩展移相优化控制进行对比实验。实验结果证明了混合优化控制在功率均分的同时可以实现电流应力优化,提高能量传输效率,同时也显著地改善了变换器在扰动情况下的动态特性。
ISOP-DAB converters are mostly used in high-power and high-voltage applications.To reduce the current stress of ISOP-DAB converters and improve the dynamic performance of the system,this paper proposes a hybrid optimal control method based on extended phase shift modulation.Firstly,the operating mode and power model of the converter under the extended phase shift are analyzed.The optimal phase shift combination of current stress is obtained through the Lagrangian optimization algorithm,and the virtual voltage balance control scheme is combined to deal with the sudden load change or input voltage disturbance state.At the same time,the average value of input voltage is used to complete the dynamic power balance between modules in combination with the structural characteristics of the converter.Finally,the hybrid optimal control method,the virtual power control based on single phase shifting and the traditional extended phase shifting optimal control are compared.The experimental results show that the hybrid optimal control can achieve current stress optimization at power sharing,improve the energy transmission efficiency,and significantly improve the dynamic characteristics of the converter under disturbance.
作者
陶海军
王宏祎
杨乃通
TAO Haijun;WANG Hongyi;YANG Naitong(School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454003,China;Henan International Joint Laboratory of Direct Drive and Control of Intelligent Equipment,Jiaozuo 454003,China)
出处
《电工电能新技术》
CSCD
北大核心
2024年第1期14-23,共10页
Advanced Technology of Electrical Engineering and Energy
基金
国家自然科学基金项目(U1804143)
河南省科技攻关项目(222102220014)
河南省高校基本科研业务费专项资金资助项目(NSFRF210409)。
