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Experimental Investigation on Influence of Shed Parameters on Surface Rainwater Characteristics of Large-Diameter Composite Post Insulators under Rain Conditions

Author

Listed:
  • Yanpeng Hao

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

  • Yifan Liao

    (School of Electric Power, South China University of Technology, Guangzhou 510640, China
    Electric Power Research Institute, China Southern Power Grid Co., Ltd., Guangzhou 510080, China)

  • Zhiqiang Kuang

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

  • Yijie Sun

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

  • Gaofeng Shang

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

  • Weixun Zhang

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

  • Guiyun Mao

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

  • Lin Yang

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

  • Fuzeng Zhang

    (Electric Power Research Institute, China Southern Power Grid Co., Ltd., Guangzhou 510080, China)

  • Licheng Li

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

Abstract

The discharges of water columns and droplets between the sheds make the leakage distance not effectively used, which is one of the main reasons for flashover of composite post insulators under heavy rainfall. To study the influence of shed parameters on surface rainwater characteristics, artificial rain tests were carried out on the large-diameter composite post insulators under the rainfall intensity of 2–15 mm/min. L wc (the length of water columns at the edge of large sheds), N wc (the number of water columns at the edge of large sheds), N wde (the number of water droplets at the edge of large sheds) and N wds (the number of water droplets in the space between two adjacent large sheds) were proposed as the parameters of surface rainwater characteristics. The influences of large shed spacing, large shed overhang and rod diameter on the parameters of surface rainwater characteristics under different rainfall intensities were analyzed. The experimental results show that, under the same rainfall intensity, with the rise in large shed spacing, large shed overhang or rod diameter, L wc , N wc , N wde and N wds all increase. Under different rainfall intensities, the trends of the parameters with the change in shed parameters are basically invariant; however, the change ranges of the parameters are different. The increases in the parameters with the rises in shed parameters and rainfall intensity are mainly attributed to the change in the rainfall on the insulator surface. The experimental results can provide references for the quantitative description of surface rainwater characteristics and the design of large-diameter composite post insulators for DC transmission systems.

Suggested Citation

  • Yanpeng Hao & Yifan Liao & Zhiqiang Kuang & Yijie Sun & Gaofeng Shang & Weixun Zhang & Guiyun Mao & Lin Yang & Fuzeng Zhang & Licheng Li, 2020. "Experimental Investigation on Influence of Shed Parameters on Surface Rainwater Characteristics of Large-Diameter Composite Post Insulators under Rain Conditions," Energies, MDPI, vol. 13(19), pages 1-16, September.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:19:p:5011-:d:418237
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    References listed on IDEAS

    as
    1. Jiazheng Lu & Pengkang Xie & Jianping Hu & Zhenglong Jiang & Zhen Fang, 2018. "AC Flashover Performance of 10 kV Rod-Plane Air-Gapped Arresters under Rain Conditions," Energies, MDPI, vol. 11(6), pages 1-11, June.
    2. Zhijin Zhang & Shenghuan Yang & Xingliang Jiang & Xinhan Qiao & Yingzhu Xiang & Dongdong Zhang, 2019. "DC Flashover Dynamic Model of Post Insulator under Non-Uniform Pollution between Windward and Leeward Sides," Energies, MDPI, vol. 12(12), pages 1-17, June.
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    Cited by:

    1. Yifan Liao & Qiao Wang & Lin Yang & Zhiqiang Kuang & Yanpeng Hao & Chuyan Zhang, 2021. "Discharge Behavior and Morphological Characteristics of Suspended Water-Drop on Shed Edge during Rain Flashover of Polluted Large-Diameter Post Insulator," Energies, MDPI, vol. 14(6), pages 1-14, March.
    2. Zhenan Zhou & Haowei Li & Silun Wen & Chuyan Zhang, 2023. "Prediction Model for the DC Flashover Voltage of a Composite Insulator Based on a BP Neural Network," Energies, MDPI, vol. 16(2), pages 1-9, January.
    3. Dongdong Zhang & Hong Xu & Jin Liu & Chengshun Yang & Xiaoning Huang & Zhijin Zhang & Xingliang Jiang, 2021. "Research on the Non-Contact Pollution Monitoring Method of Composite Insulator Based on Space Electric Field," Energies, MDPI, vol. 14(8), pages 1-15, April.

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