基于器件复用的有源功率解耦型模块化多电平变换器拓扑研究  

Active Power Decoupling for Full-bridge Submodules of a Modular Multilevel Converter

作　　者：贾冠龙 史斌昊 李明硕 牛峰[1] 汤雨 JIA Guanlong;SHI Binhao;LI Mingshuo;NIU Feng;TANG Yu(Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province(Hebei University of Technology),Beichen District,Tianjin 300401,China)

机构地区：[1]河北省电磁场与电器可靠性重点实验室(河北工业大学),天津市北辰区300401

出　　处：《中国电机工程学报》2025年第7期2755-2767,I0026,共14页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

基　　金：国家自然科学项目(青年基金)(52307199);河北省自然科学基金项目(E2022202065);河北省教育厅在读研究生创新能力培养资助项目(CXZZSS2024013)。

摘　　要：模块化多电平变换器(modular multilevel converter,MMC)拓扑已广泛应用于中高压大功率输配电和电机驱动领域。其中,具有直流故障穿越能力的全桥子模块(full-bridge submodule,FB-SM)型MMC拓扑目前正受到越来越多的关注和应用,但为了抑制子模块电容电压纹波,需使用较大电容值的子模块电容,其显著增加系统的硬件成本和体积。该文提出一种基于器件复用的有源功率解耦型FB-SM(FB-SM with active power decoupling,APD-SM),通过子模块中的器件复用,使其兼具电容电压纹波抑制和直流故障穿越能力,同时不改变MMC拓扑的外输出特性。相较于传统FB-SM拓扑,该拓扑可在全功率因数范围内显著抑制子模块电容电压纹波;详细介绍该拓扑的推演规律、运行原理、调制方法和控制策略,并对拓扑结构中的关键参数进行分析和设计,从多方面与传统FB-SM拓扑进行对比分析;最后,基于PLECS仿真平台搭建APD-SM和FB-SM型MMC仿真模型(分别缩写为APD-MMC和FB-MMC),并基于样机模型进行实验验证。仿真和实验结果验证该拓扑和控制策略的有效性。The modular multilevel converter(MMC)topology has been widely used in medium/high voltage high-power transmission and distribution and motor drive fields.The full-bridge submodule(FB-SM)MMC topology with fault handling capability is currently receiving increasing attention and application.However,in order to suppress the SM capacitor voltage ripple,the usage of SM capacitors with larger capacitance significantly increases the hardware cost and volume of the system.In this paper,a modified FB-SM with active power decoupling circuit(APD-SM)is introduced,it combines the ability of capacitor voltage ripple suppression and DC fault traversal through device reuse without changing the external output characteristics of the topology.Compared to traditional MMC,the SM capacitor voltage ripple of this topology can be suppressed significantly in the full power factor range.The deduction rules,operating principles,modulation methods,and control strategies of this topology are introduced in this artical.In addition,key parameters in the topology structure are designed and the topology is compared with traditional FB-SM topology from multiple aspects.Finally,the simulation and experimental platform of MMC with APD-SM and FB-SM(Abbreviated as APD-MMC and FB-MMC,respectively)are built,and experimental verification was conducted based on the prototype model.Simulations and experimental results verify the validity of the APD-MMC topology and control strategy.

关 键 词：模块化多电平变换器 全桥子模块 有源滤波解耦电路 电容电压纹波 

分 类 号：TM464[电气工程—电器]