适用于中压领域的V形钳位多电平变换器  

V-Clamp Multilevel Converters Suitable for Medium-Voltage Fields

作　　者：原露恬 王琛琛[1] 薛尧[1] 杨晓峰[1] 郑琼林[1] Yuan Lutian;Wang Chenchen;Xue Yao;Yang Xiaofeng;Zheng Trillion Q(College of Electrical Engineering Beijing Jiaotong University,Beijing 100044 China)

机构地区：[1]北京交通大学电气工程学院,北京100044

出　　处：《电工技术学报》2021年第20期4318-4328,4338,共12页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金重点资助项目(51737001)。

摘　　要：多电平变换器在中高压大功率电能变换领域已得到广泛的应用。该文针对中压电能变换领域,提出V形钳位多电平变换器(VMC)拓扑族。在现有IGBT电压等级的条件下,该拓扑族采用较少数量的器件就可以实现中压大功率电能变换,结构简单;同时该拓扑族无需飞跨电容,降低了系统控制复杂度。首先提出VMC拓扑族的构成,包括拓展方式、一般形式以及演化类型;在此基础上研究VMC工作原理及控制方法,分析直接钳位机制和阻断电压分配问题。考虑目前商业主流功率器件电压等级,针对拓扑结构特点,揭示适宜VMC的电压等级;最后通过仿真和实验结果验证了所提拓扑族及控制方法的可行性,也进一步证明了该文理论分析的正确性。Multilevel converter has been widely used in the medium/high-voltage high-power conversion fields.This paper proposes a new family of topologies named V-clamp multilevel converters(VMCs),which can achieve medium-voltage high-power conversion by a small number of devices.Besides,without flying capacitors employed in the phase legs,the control of the VMC is much easier and simpler.This paper reveals the composition of the VMC topology family,including the expansion method,general form,and evolution type.On this basis,this paper investigates the working principle and control method of VMCs,and analyzes the direct clamping mechanism and blocking voltage distribution.Compared with the existing multilevel converters,the VMC is more suitable for medium-voltage applications.The simulation and experimental results verify the feasibility of the VMC topology family and control method,and further prove the correctness of the theoretical analysis in this paper.

关 键 词：多电平变换器 电能变换 共直流侧电容 直接钳位 V形钳位 

分 类 号：TM46[电气工程—电器]