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<p>The five-level active neutral point clamped (5L-ANPC) converter has great potential for medium-voltage high-power applications. However, the effect of the system computational time-delay is not considered in existing flying-capacitor (FC) voltage balance methods. This computational time-delay can lead to flying-capacitor over-charge and over-discharge problems. To solve these problems, the processes of flying-capacitor over-charge and over-discharge are theoretically analyzed and a delay compensation strategy is proposed. With this strategy, the problem of FC over-charge and over-discharge can be effectively overcome. Finally, simulation and experimental results are presented to validate the effectiveness of the proposed strategy.</p>

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Delay compensation strategy of flying-capacitors for five-level ANPC converters

  • 期刊论文

  • 发表日期：

    2025年2月11日

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  • Zhan Liu,
  • Junru Chen,
  • Zhenglong Xia,
  • Daopeng Ren

摘要

The five-level active neutral point clamped (5L-ANPC) converter has great potential for medium-voltage high-power applications. However, the effect of the system computational time-delay is not considered in existing flying-capacitor (FC) voltage balance methods. This computational time-delay can lead to flying-capacitor over-charge and over-discharge problems. To solve these problems, the processes of flying-capacitor over-charge and over-discharge are theoretically analyzed and a delay compensation strategy is proposed. With this strategy, the problem of FC over-charge and over-discharge can be effectively overcome. Finally, simulation and experimental results are presented to validate the effectiveness of the proposed strategy.