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Calculation of Equivalent Resistance for Ground Wires Twined with Armor Rods in Contact Terminals

Author

Listed:
  • Gang Liu

    (School of Electric Power, South China University of Technology, Guangzhou 510640, China)

  • Deming Guo

    (School of Electric Power, South China University of Technology, Guangzhou 510640, China)

  • Pengyu Wang

    (School of Electric Power, South China University of Technology, Guangzhou 510640, China)

  • Honglei Deng

    (School of Electric Power, South China University of Technology, Guangzhou 510640, China)

  • Xiaobin Hong

    (School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou 510640, China)

  • Wenhu Tang

    (School of Electric Power, South China University of Technology, Guangzhou 510640, China)

Abstract

Ground wire breakage accidents can destroy the stable operation of overhead lines. The excessive temperature increase arising from the contact resistance between the ground wire and armor rod in the contact terminal is one of the main reasons causing the breakage of ground wires. Therefore, it is necessary to calculate the equivalent resistance for ground wires twined with armor rods in contact terminals. According to the actual distribution characteristics of the contact points in the contact terminal, a three-dimensional electromagnetic field simulation model of the contact terminal was established. Based on the model, the current distribution in the contact terminal was obtained. Subsequently, the equivalent resistance of a ground wire twined with the armor rod in the contact terminal was calculated. The effects of the factors influencing the equivalent resistance were also discussed. The corresponding verification experiments were conducted on a real ground wire on a contact terminal. The measurement results of the equivalent resistance for the armor rod segment showed good agreement with the electromagnetic modeling results.

Suggested Citation

  • Gang Liu & Deming Guo & Pengyu Wang & Honglei Deng & Xiaobin Hong & Wenhu Tang, 2018. "Calculation of Equivalent Resistance for Ground Wires Twined with Armor Rods in Contact Terminals," Energies, MDPI, vol. 11(4), pages 1-24, March.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:4:p:737-:d:137893
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    References listed on IDEAS

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    1. Pengyu Wang & Gang Liu & Hui Ma & Yigang Liu & Tao Xu, 2017. "Investigation of the Ampacity of a Prefabricated Straight-Through Joint of High Voltage Cable," Energies, MDPI, vol. 10(12), pages 1-17, December.
    2. Lei You & Jian Wang & Gang Liu & Hui Ma & Ming Zheng, 2018. "Thermal Rating of Offshore Wind Farm Cables Installed in Ventilated J-Tubes," Energies, MDPI, vol. 11(3), pages 1-14, March.
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    Cited by:

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    2. Fan Yang & Ningxi Zhu & Gang Liu & Hui Ma & Xiaoyu Wei & Chuanliang Hu & Zhenhua Wang & Jiasheng Huang, 2018. "A New Method for Determining the Connection Resistance of the Compression Connector in Cable Joint," Energies, MDPI, vol. 11(7), pages 1-19, June.
    3. Jiazheng Lu & Jun Guo & Zhou Jian & Yihao Yang & Wenhu Tang, 2018. "Resilience Assessment and Its Enhancement in Tackling Adverse Impact of Ice Disasters for Power Transmission Systems," Energies, MDPI, vol. 11(9), pages 1-15, August.

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