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A Non-Stop Ice-Melting Method for Icing Lines in Distribution Network Based on a Flexible Grounding Device

Author

Listed:
  • Yabing Zhou

    (Qingyuan Power Supply Bureau China Southern Power Grid Corporation, Qingyuan 511518, China)

  • Fang Yang

    (Qingyuan Power Supply Bureau China Southern Power Grid Corporation, Qingyuan 511518, China)

  • Jiaxin Xu

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Xiaoliang Tang

    (Qingyuan Power Supply Bureau China Southern Power Grid Corporation, Qingyuan 511518, China)

  • Jiangyun Wang

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Dayi Li

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

Abstract

Icing on transmission lines poses a serious threat to the power grid. Existing de-icing solutions have limitations in short-distance distribution networks with multiple branches. We propose a method that utilizes a flexible grounding device to adjust the zero-sequence reactive current in the distribution network, enabling de-icing of lines without power interruption. Simulation and experimental results validate the feasibility and effectiveness of the proposed method and control scheme. The method can accurately regulate the de-icing current to achieve de-icing under various conditions, with the actual de-icing current deviating from the set value by less than 0.3%. During de-icing, the line voltage on the load side remains essentially stable, with an error of less than 0.5%, ensuring that the normal supply voltage of the distribution network is not affected, and the entire network load does not require a power outage. The de-icing device interacts only with reactive power in the distribution network, saving capacity for the DC voltage stabilizing power supply and demonstrating good economic efficiency.

Suggested Citation

  • Yabing Zhou & Fang Yang & Jiaxin Xu & Xiaoliang Tang & Jiangyun Wang & Dayi Li, 2025. "A Non-Stop Ice-Melting Method for Icing Lines in Distribution Network Based on a Flexible Grounding Device," Energies, MDPI, vol. 18(8), pages 1-21, April.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:8:p:1886-:d:1630301
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