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With the popularization of electric vehicles (EV), harmonic problems in charging stations have become increasingly prominent. In response, this paper proposes a frequency adaptive active power filtering strategy suitable for charging stations. Firstly, a proportional fast repetitive control (RC) is designed to compensate for the dominant 6k ± 1 harmonic current in charging stations; Secondly, to address the issue of reduced accuracy in harmonic compensation caused by frequency fluctuations in the power grid, a fractional delay (FD) filter based on Taylor series expansion is proposed, which achieves precise approximation of the repeated controller fractional delay caused by frequency fluctuations at a lower complexity, and realizes frequency adaptive harmonic compensation. The final experimental results show that the proposed strategy has good harmonic compensation performance at different frequencies, and the total harmonic distortion (THD) rate remains below 5% after treatment.

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Frequency Adaptive Active Power Filtering Strategy for Harmonic Suppression in Electric Vehicle Charging Stations

  • 会议论文

  • 发表日期：

    2026年

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  • Feng Ru,
  • Yang Yu,
  • Jiale Zhang,
  • Liang Xuan,
  • Yong Lu,
  • Xianfeng Xu

摘要

With the popularization of electric vehicles (EV), harmonic problems in charging stations have become increasingly prominent. In response, this paper proposes a frequency adaptive active power filtering strategy suitable for charging stations. Firstly, a proportional fast repetitive control (RC) is designed to compensate for the dominant 6k ± 1 harmonic current in charging stations; Secondly, to address the issue of reduced accuracy in harmonic compensation caused by frequency fluctuations in the power grid, a fractional delay (FD) filter based on Taylor series expansion is proposed, which achieves precise approximation of the repeated controller fractional delay caused by frequency fluctuations at a lower complexity, and realizes frequency adaptive harmonic compensation. The final experimental results show that the proposed strategy has good harmonic compensation performance at different frequencies, and the total harmonic distortion (THD) rate remains below 5% after treatment.