基于移相控制统一模型的双有源桥DC-DC变换器基波环流优化控制策略  

Fundamental-wave optimal control strategy of circulation of DAB DC-DC converter based on unified model of phase shift control

作　　者：曾进辉[1] 张长威 曹斌 余雪萍 兰征 邹彬[1] 王婷[3] 曹洋[3] ZENG Jinhui;ZHANG Changwei;CAO Bin;YU Xueping;LAN Zheng;ZOU Bin;WANG Ting;CAO Yang(College of Electrical and Information Engineering,Hunan University of Technology,Zhuzhou 412007,China;State Grid Changsha Power Supply Company,Changsha 410118,China;Zhuzhou National Engineering Research Center of Converters Co.,Ltd.,Zhuzhou 412007,China)

机构地区：[1]湖南工业大学电气与信息工程学院,湖南株洲412007 [2]国网湖南省电力有限公司长沙供电分公司,湖南长沙410118 [3]株洲变流技术国家工程研究中心有限公司,湖南株洲412007

出　　处：《电力自动化设备》2024年第4期74-81,共8页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(52377185);湖南省自然科学基金资助项目(2021JJ50059);湖南省教育厅科学研究项目(22C0322)。

摘　　要：为充分利用双有源桥DC-DC变换器的容量,减小无功功率,提升工作效率,提出一种基于变换器移相控制统一模型的基波环流优化控制策略。通过引入基波移相比对变换器的所有移相控制方式进行统一描述,并采用傅里叶分解法建立全桥交流电压及电感电流的统一模型。该统一模型降低了多控制变量下变换器多模态分析的复杂性,适用于不同移相控制的所有工作模式,具有普适性。基于频域分析法和功率因数角,构建变换器传输功率及无功功率的统一数学模型。在此基础上,提出考虑无功基波分量的环流优化控制策略,并对传导损耗进行建模与分析。该策略简单有效,能够很好地减小变换器无功功率和改善系统效率,更有利于工程实际的应用。搭建了实验平台,对比了所提基波环流优化控制策略与传统移相控制方式下变换器的功率因数及变换效率,仿真和实验结果验证了理论分析的正确性和所提控制策略的可行性。For making full use of the capacity of dual active bridge(DAB)DC-DC converters,reducing reac⁃tive power and improving working efficiency,a fundamental-wave optimal control strategy of circulation based on the unified model of phase shift control for the converter is proposed.All phase shift control modes of the converter are described uniformly by introducing fundamental phase shift ratio,and the unified model of AC voltage of full bridges and inductance current is established by using Fourier decomposition.The unified model reduces the complexity of multi-mode analysis of converters under multivariate control,and is suitable for all operating modes under different phase shift control with the universality.Based on frequency domain analysis and power factor angle,a unified mathematical model of converter transmission power and reactive power is built.On this basis,an optimal control strategy considering the fundamentalwave component of reactive power is proposed,and the conduction loss is modeled and analyzed.This strategy is simple and effective to reduce reactive power of the converter and improve system efficiency commendably,which is more conducive to the practical application of the project.An experimental platform is built to compare the power factor and conversion efficiency of the converter under the proposed fundamental-wave optimal control strategy and the conventional phase shift control modes.The simulative and experimental results verify the correctness of the theoretical analysis and the feasibility of the proposed control strategy.

关 键 词：双有源桥 DC-DC变换器 统一模型 基波优化 功率因数 传输效率 

分 类 号：TM46[电气工程—电器]