电机与控制应用2025，Vol.52Issue(4)：367-375,9.DOI:10.12177/emca.2025.017
面向共模干扰电流抑制的SiC MMC调控策略研究
Research on SiC MMC Control Strategy for Common-Mode Interference Current Suppression
摘要
Abstract
[Objective]Silicon carbide(SiC)devices,characterized by low switching losses and high voltage endurance,demonstrate significant advantages in modular multilevel converter(MMC)for medium-voltage applications.However,submodules based on SiC devices generate high du/dt and di/dt during switching transients,leading to severe electromagnetic interference that compromises system safety.[Methods]To address this issue,this study analyzed the stray capacitance distribution characteristics of submodules based on the MMC topology.By performing an equivalent transformation of stray capacitance,an equivalent circuit model for common-mode interference was established.On this basis,a novel common-mode current suppression strategy was proposed,employing carrier phase-shifted pulse width modulation with complementary submodules triggering pulses in the upper and lower bridge arms.By adjusting the carrier phase of the complementary submodules,common-mode current suppression was achieved.[Results]Simulation results showed that the proposed method effectively maintained submodules capacitor voltage balance and ensured high-quality AC-side output waveforms,both of which were critical performance factors for MMC.Compared to conventional methods,the proposed strategy reduced the peak common-mode current by 43％,demonstrating better suppression capability and validating its effectiveness.[Conclusion]The proposed method effectively suppresses common-mode interference current,enhancing the overall integrity and reliability of SiC MMC.These findings provide valuable insights into the advancement of power electronics technology in medium-voltage applications.关键词
模块化多电平换流器/载波移相脉冲宽度调制/共模电流/碳化硅Key words
modular multilevel converter/carrier phase-shifted pulse width modulation/common-mode current/silicon carbide分类
动力与电气工程引用本文复制引用
王丹,贺悝,谭庄熙..面向共模干扰电流抑制的SiC MMC调控策略研究[J].电机与控制应用,2025,52(4):367-375,9.基金项目
湖南省自然科学基金(2022JJ40150) （2022JJ40150）
国网总部科技项目(52272810005)Natural Science Foundation of Hu'nan Province,China(2022JJ40150) （52272810005）
State Grid Corporation Technology Project(52272810005) （52272810005）
