Scholarlink

Conventional three-level space vector pulse-width modulation (3L-SVPWM) algorithms applied to three-phase four-wire(3P4W) active power filters (APFs) often neglect zero-sequence voltage regulation, leading to suboptimal harmonic suppression. To address this limitation, this study introduces a modified 3L-SVPWM strategy incorporating zero-sequence voltage analysis. The proposed method dynamically redistributes the dwell times of positive and negative small vectors within the traditional SVPWM framework while integrating DC-link voltage balancing control. This dual approach enhances the harmonic compensation capability of neutral-point-clamped (NPC) three-level APFs in four-wire systems.Validation via Matlab/Simulink simulations demonstrates significant improvements in total harmonic distortion (THD) reduction, confirming the algorithm's efficacy in real-world power quality management scenarios.

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Research on Improved Three Level SVPWM Algorithm of Three Phase Four Wire APF

  • 会议论文

  • 发表日期：

    2026年

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  • Shuang Liu,
  • Yilin Liu,
  • Zhankai Fang,
  • Jiaxi Gou,
  • Junkui Zhao,
  • Hongrui Zhang,
  • Qiang Lai

摘要

Conventional three-level space vector pulse-width modulation (3L-SVPWM) algorithms applied to three-phase four-wire(3P4W) active power filters (APFs) often neglect zero-sequence voltage regulation, leading to suboptimal harmonic suppression. To address this limitation, this study introduces a modified 3L-SVPWM strategy incorporating zero-sequence voltage analysis. The proposed method dynamically redistributes the dwell times of positive and negative small vectors within the traditional SVPWM framework while integrating DC-link voltage balancing control. This dual approach enhances the harmonic compensation capability of neutral-point-clamped (NPC) three-level APFs in four-wire systems.Validation via Matlab/Simulink simulations demonstrates significant improvements in total harmonic distortion (THD) reduction, confirming the algorithm's efficacy in real-world power quality management scenarios.