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DC Flashover Performance of Ice-Covered Composite Insulators with Parallel Air Gaps

Author

Listed:
  • Jianlin Hu

    (State Key Laboratory of Power Transmission Equipments & System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing 400030, China)

  • Xingliang Jiang

    (State Key Laboratory of Power Transmission Equipments & System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing 400030, China)

  • Fanghui Yin

    (NSERC/Hydro-Quebec/UQAC Industrial Chair on Atmospheric Icing of Power Network Equipment (CIGELE) and Canada Research Chair on Engineering of Power Network Atmospheric Icing (INGIVRE), Université du Québec à Chicoutimi, Chicoutimi, QC G7H 2B1, Canada)

  • Zhijin Zhang

    (State Key Laboratory of Power Transmission Equipments & System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing 400030, China)

Abstract

DC flashover performance of ice-covered composite insulators with a parallel air gap (CI/PAG) is an important technical consideration when such insulators are used to isolate ground wires for the purpose of DC ice-melting. Tests on tension and suspension types of CI/PAG were thus carried out in the artificial climate chamber to investigate their DC icing flashover performance. The influences of parallel air gap, ice thickness, pollution severity and air pressure on DC negative 50% flashover voltage ( U 50% ) of CI/PAG were investigated. Test results show that the parallel air gap affected both the discharge path and U 50% . With increasing ice thickness, U 50% declined by up to 52%; this effect was more evident when the breakdown occurred in the air gap. The pollution severity affected U 50% only when the flashover happened along insulator surface. With a decrease of atmospheric pressure, U 50% decreased. U 50% and the ratio of air pressure were in a power function relationship with a positive characteristic exponent which was relevant to the discharge path.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:8:y:2015:i:6:p:4983-4999:d:50336
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    References listed on IDEAS

    as
    1. Jianlin Hu & Caixin Sun & Xingliang Jiang & Daibo Xiao & Zhijin Zhang & Lichun Shu, 2012. "DC Flashover Performance of Various Types of Ice-Covered Insulator Strings under Low Air Pressure," Energies, MDPI, vol. 5(5), pages 1-23, May.
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    Cited by:

    1. 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.
    2. Xingbo Han & Xingliang Jiang & Zhongyi Yang & Conglai Bi, 2018. "A Predictive Model for Dry-Growth Icing on Composite Insulators under Natural Conditions," Energies, MDPI, vol. 11(6), pages 1-16, May.
    3. 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.
    4. Jingjing Wang & Junhua Wang & Jianwei Shao & Jiangui Li, 2017. "Image Recognition of Icing Thickness on Power Transmission Lines Based on a Least Squares Hough Transform," Energies, MDPI, vol. 10(4), pages 1-15, March.
    5. Guangquan Zhang & Xueqin Zhang & Bo Wang & Yujun Guo & Guoqiang Gao & Guangning Wu, 2022. "Study on the Discharge Characteristics along the Surface and Charge Movement Characteristics of Insulating Media in an Airflow Environment," Energies, MDPI, vol. 15(10), pages 1-19, May.

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