三电平Buck变换器的新型解耦控制方案  

Novel Decoupling Control Scheme for Three-level Buck Converter

作　　者：吴家荣 王擎宇 韦峻峰 吴伟林 WU Jiarong;WANG Qingyu;WEI Junfeng;WU Weilin(College of Electronic Information,Guangxi Minzu University,Nanning 530006,China)

机构地区：[1]广西民族大学电子信息学院,广西南宁530006

出　　处：《信息与控制》2023年第3期352-359,共8页Information and Control

基　　金：广西高校中青年教师科研基础能力提升项目(2021KY0164);广西民族大学人才引进启动基金(2020KJQD25)。

摘　　要：为解决三电平Buck变换器中飞跨电容电压的平衡控制问题及飞跨电容电压与输出电压的解耦难题,提出一种新型解耦控制方案。建立三电平Buck变换器的仿射非线性数学模型,研究基于微分几何理论的模型线性化解耦条件,推导解耦子系统的反馈控制律,设计状态反馈控制器,并对满足稳定要求的控制参数进行探讨。与现有解耦控制方法相比较,仿真结果表明所提控制方案具有更强的抗干扰性能、更快的响应速度和更好的动态调节特性。实验结果进一步验证了所提新型解耦控制方案的正确性和优越性。In this study,a novel decoupling control scheme is proposed to solve the balance control problem of flying capacitor(FC)voltage and settle the decoupling issue between FC voltage and output voltage in three-level buck converters.We also establish an affine nonlinear mathematical model of the three-level buck converter and study the decoupling conditions of model linearization based on differential geometry theory.In addition,we derive a feedback control law of the decoupling subsystem,design a state feedback controller,and discuss whether the control parameters meet the stability requirements.Our simulation results show that the proposed control scheme has stronger anti-interference performance,faster response speed,and better dynamic regulation characteristics compared with the existing decoupling control method.The experimental results further verify the correctness and superiority of the proposed novel decoupling control scheme.

关 键 词：BUCK变换器 三电平 解耦控制 状态反馈控制 

分 类 号：TM46[电气工程—电器]