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Voltage Distribution and Flashover Performance of 220 kV Composite Insulators under Different Icing Conditions

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  • Jiazheng Lu

    (State Key Laboratory of Disaster Prevention & Reduction for Power Grid Transmission & Distribution Equipment, State Grid Hunan Electric Power Corporation Disaster Prevention & Reduction Center, Changsha 410007, China)

  • Pengkang Xie

    (State Key Laboratory of Disaster Prevention & Reduction for Power Grid Transmission & Distribution Equipment, State Grid Hunan Electric Power Corporation Disaster Prevention & Reduction Center, Changsha 410007, China)

  • Zhenglong Jiang

    (State Key Laboratory of Disaster Prevention & Reduction for Power Grid Transmission & Distribution Equipment, State Grid Hunan Electric Power Corporation Disaster Prevention & Reduction Center, Changsha 410007, China)

  • Zhen Fang

    (State Key Laboratory of Disaster Prevention & Reduction for Power Grid Transmission & Distribution Equipment, State Grid Hunan Electric Power Corporation Disaster Prevention & Reduction Center, Changsha 410007, China)

  • Wei Wu

    (State Key Laboratory of Disaster Prevention & Reduction for Power Grid Transmission & Distribution Equipment, State Grid Hunan Electric Power Corporation Disaster Prevention & Reduction Center, Changsha 410007, China)

Abstract

Composite insulators are widely used in modern power systems to provide electrical insulation and mechanical support for transmission lines and substations. However, the insulation strength will decrease greatly under the combined conditions of ice-covering and contamination, and icing flashovers may take place under these serious conditions. In this paper, AC flashover tests of different artificially ice-covered 220 kV composite insulators were carried out in a multi-function artificial climate chamber under energized ice accumulation conditions. The test results indicate that, with the increasing of ice thickness, the flashover voltages decrease and tend to saturation. The icing flashover voltages can be increased by adding booster sheds, but excessive booster sheds can lead to lower flashover voltages under heavy icing conditions. The voltage distributions of the iced insulators were measured using experimental methods. The results show that, the air gaps withstand most of the applied voltage. The zinc oxide (ZnO) resistors that are contained in the insulators can influence the voltage distributions of the iced insulators, but have little affect on the icing flashover voltages. The work done in this paper can provide reference for the design and type selection of outdoor composite insulators in cold climate regions.

Suggested Citation

  • Jiazheng Lu & Pengkang Xie & Zhenglong Jiang & Zhen Fang & Wei Wu, 2018. "Voltage Distribution and Flashover Performance of 220 kV Composite Insulators under Different Icing Conditions," Energies, MDPI, vol. 11(3), pages 1-13, March.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:3:p:632-:d:135953
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    References listed on IDEAS

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    1. Ang Ren & Hongshun Liu & Jianchun Wei & Qingquan Li, 2017. "Natural Contamination and Surface Flashover on Silicone Rubber Surface under Haze–Fog Environment," Energies, MDPI, vol. 10(10), pages 1-18, October.
    2. Jianlin Hu & Caixin Sun & Xingliang Jiang & Qing Yang & Zhijin Zhang & Lichun Shu, 2011. "Model for Predicting DC Flashover Voltage of Pre-Contaminated and Ice-Covered Long Insulator Strings under Low Air Pressure," Energies, MDPI, vol. 4(4), pages 1-16, April.
    3. Yukun Lv & Weiping Zhao & Jingang Li & Yazhao Zhang, 2017. "Simulation of Contamination Deposition on Typical Shed Porcelain Insulators," Energies, MDPI, vol. 10(7), pages 1-13, July.
    4. Qing Yang & Rui Wang & Wenxia Sima & Chilong Jiang & Xing Lan & Markus Zahn, 2012. "Electrical Circuit Flashover Model of Polluted Insulators under AC Voltage Based on the Arc Root Voltage Gradient Criterion," Energies, MDPI, vol. 5(3), pages 1-18, March.
    5. Jianlin Hu & Xingliang Jiang & Fanghui Yin & Zhijin Zhang, 2015. "DC Flashover Performance of Ice-Covered Composite Insulators with Parallel Air Gaps," Energies, MDPI, vol. 8(6), pages 1-17, May.
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    Cited by:

    1. Yi Wen & Yifei Chen & Jianrong Wu & Xianyin Mao & Huan Huang & Lin Yang, 2022. "Research on Risk Assessment and Suppression Measures for Ice-Shedding on 500 kV Compact Overhead Lines," Energies, MDPI, vol. 15(21), pages 1-14, October.
    2. 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.
    3. Guolin Yang & Yi Liao & Xingliang Jiang & Xiangshuai Han & Jiangyi Ding & Yu Chen & Xingbo Han & Zhijin Zhang, 2022. "Research on Value-Seeking Calculation Method of Icing Environmental Parameters Based on Four Rotating Cylinders Array," Energies, MDPI, vol. 15(19), pages 1-17, October.
    4. Xiangxin Li & Ming Zhou & Yazhou Luo & Gang Wang & Lin Jia, 2018. "Effect of Ice Shedding on Discharge Characteristics of an Ice-Covered Insulator String during AC Flashover," Energies, MDPI, vol. 11(9), pages 1-11, September.

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