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<p>In power factor correction converters, the conflict between the grid-side AC current harmonic suppression and the DC voltage dynamic response limits the regulation effectiveness of the PFC circuit, leading to power quality degradation. To address this challenge, a novel three-loop voltage harmonic feed-forward compensation scheme based on proportional-integral and cascaded proportional resonant control architectures is proposed in this paper. A small-signal model characterizing the dynamic properties of the system is established. Then, the control-output transfer function is derived to provide a theoretical basis for designing the controller. Finally, a 3&#xa0;kW power ultrasonic generator is developed based on the control method proposed in this paper. Simulation and experimental results verify that the proposed three-loop control architecture achieves significant optimization in harmonic suppression and dynamic response. In additional, it improves the quality of the AC current. Results show that a prototype controlled by the proposed method has a total harmonic distortion of 0.12% of the grid current, a power factor correction of 0.99, and a good dynamic response.</p>

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Triple-loop voltage feed-forward compensated PFC converter using PI and cascaded PR control

  • 期刊论文

  • 发表日期：

    2025年12月15日

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  • Nan Zhang,
  • Chenyang Su,
  • Jianting Liu,
  • Xifeng Li,
  • Jianhua Zhang

摘要

In power factor correction converters, the conflict between the grid-side AC current harmonic suppression and the DC voltage dynamic response limits the regulation effectiveness of the PFC circuit, leading to power quality degradation. To address this challenge, a novel three-loop voltage harmonic feed-forward compensation scheme based on proportional-integral and cascaded proportional resonant control architectures is proposed in this paper. A small-signal model characterizing the dynamic properties of the system is established. Then, the control-output transfer function is derived to provide a theoretical basis for designing the controller. Finally, a 3 kW power ultrasonic generator is developed based on the control method proposed in this paper. Simulation and experimental results verify that the proposed three-loop control architecture achieves significant optimization in harmonic suppression and dynamic response. In additional, it improves the quality of the AC current. Results show that a prototype controlled by the proposed method has a total harmonic distortion of 0.12% of the grid current, a power factor correction of 0.99, and a good dynamic response.