中国电机工程学报2025，Vol.45Issue(20)：8153-8173,中插25,22.DOI:10.13334/j.0258-8013.pcsee.242037
模块化多电平变流器容错运行方法综述
Review of Fault-tolerant Operation Methods for Modular Multilevel Converters
摘要
Abstract
The modular multilevel converter(MMC)is extensively utilized in medium and high-voltage engineering applications due to its modular structure and flexible scalability.However,the power devices and capacitors within the submodules(SMs)are susceptible to failure under high current and voltage conditions,which can compromise the stable operation of the MMC.When an SM is removed due to faults,the asymmetric operation of the MMC can progressively deteriorate its operational status,potentially resulting in system downtime.Fault-tolerant control methods have been extensively studied as effective means to ensure the continuous and reliable operation of MMCs.This paper begins by introducing the MMC topology and analyzing the characteristics of asymmetric operation.It clarifies the primary effects of asymmetric operation on circulating current,DC voltage,and other operational states.Secondly,based on the control objectives and specific execution methods of MMC fault-tolerant operation techniques,a review of both domestic and international literature on fault-tolerant operation methods is conducted.The strengths and weaknesses of various types of fault-tolerant operation methods are summarized.Finally,the primary future research direction for fault-tolerant operation methods in MMCs is discussed.This focuses on key challenges and concepts that need to be addressed,including neutral point offset,fundamental frequency injection,and sub-module voltage control,aiming to enhance voltage utilization and minimize losses.关键词
模块化多电平变流器/子模块故障/容错运行方法Key words
modular multilevel converter(MMC)/submodule failures/fault-tolerant operation methods分类
信息技术与安全科学引用本文复制引用
刘泽浩,赵艳雷,路茂增,陈佳佳,徐丙垠..模块化多电平变流器容错运行方法综述[J].中国电机工程学报,2025,45(20):8153-8173,中插25,22.基金项目
国家自然科学基金项目(52377110) （52377110）
山东理工大学博士科研启动项目(424008).Project Supported by National Natural Science Foundation of China(52377110) （424008）
Doctoral Research Start-up Project of Shandong University of Technology(424008). （424008）
