高电压技术2025，Vol.51Issue(10)：4933-4944,12.DOI:10.13336/j.1003-6520.hve.20250179
基于投入窗口识别与分层算法的MMC子模块电容状态监测方法
Capacitance Condition Monitoring of MMC Sub-module with Inserted Window Recognition Method and Time-slicing Algorithm
摘要
Abstract
Accurately monitoring the capacitance of all sub-modules is crucial to maintain the reliability of modular multilevel converters(MMCs).This paper proposes a novel capacitance monitoring method based on the inserted window recognition scheme without installing additional sensors and interrupting system operations.The principle of using the inserted window and internal voltage/current information to obtain the SM capacitance is introduced.Then,a selected time-slicing algorithm based on the inserted duration is proposed to enhance the monitoring precision and efficiency.A straightforward implementation method for the full MMC system is developed.Validated by extensive simulated and ex-perimental results,the method demonstrates exceptional accuracy with errors below 0.5％.The method also shows strong robustness in dynamics and is not complicated for implementation for all SMs in an MMC.关键词
模块化多电平变换器/子模块/电容/状态监测/脉宽调制Key words
modular multilevel converter/sub-module/capacitor/condition monitoring/pulse width modulation引用本文复制引用
潘建宇,林文琦,肖凯,邹延生..基于投入窗口识别与分层算法的MMC子模块电容状态监测方法[J].高电压技术,2025,51(10):4933-4944,12.基金项目
重庆市技术创新与应用发展专项重大项目(CSTB2024TIAD-STX0024) （CSTB2024TIAD-STX0024）
中国南方电网公司科技资助项目(0120002024030301SJ00100).Project supported by Chongqing Technological Innovation and Application Development Major Project(CSTB2024TIAD-STX0024),China Southern Power Grid Corporation Science and Technology Funding Project(0120002024030301SJ00100). （0120002024030301SJ00100）
