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Optical Diagnostic Characterization of the Local Arc on Contaminated Insulation Surface at Low Pressure

Author

Listed:
  • Hao Yang

    (School of Electronics and Information, Xi’an Polytechnic University, Xi’an 710048, China)

  • Haotian Zhang

    (School of Electronics and Information, Xi’an Polytechnic University, Xi’an 710048, China)

  • Wen Cao

    (School of Electronics and Information, Xi’an Polytechnic University, Xi’an 710048, China)

  • Xuanxiang Zhao

    (School of Electronics and Information, Xi’an Polytechnic University, Xi’an 710048, China)

  • Ran Wen

    (School of Electronics and Information, Xi’an Polytechnic University, Xi’an 710048, China)

  • Junping Zhao

    (School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Shengwu Tan

    (Pinggao Group Company Limited, Pingdingshan 467000, China)

  • Pengchao Wang

    (Pinggao Group Company Limited, Pingdingshan 467000, China)

Abstract

Flashover of contaminated insulators is a major problem for power systems at high altitude. Laboratory experiments have shown that the optical diagnostic method can provide extensive information on the physical process of contamination flashover. In this paper, a study of the local arc on a wet polluted surface under low pressure by using the optical diagnostic method is presented. The thickness of the continuous spectrum, spectral line intensity and the spectral composition varies significantly in different stages of the local arc development. Thermodynamic parameters of the local arc (including electron temperature, electron density and conductivity) are obtained by analyzing the spectra. Both the electron temperature and the conductivity increase with the increase in leakage current and air pressure. Although the electron density does not change significantly with an increase in leakage current, it increases significantly with an increase in air pressure. The findings of this work could be used as supplementary information for the investigation of local arc parameters, thus providing a reliable reference for the calculation of contamination flashover at high altitude.

Suggested Citation

  • Hao Yang & Haotian Zhang & Wen Cao & Xuanxiang Zhao & Ran Wen & Junping Zhao & Shengwu Tan & Pengchao Wang, 2021. "Optical Diagnostic Characterization of the Local Arc on Contaminated Insulation Surface at Low Pressure," Energies, MDPI, vol. 14(19), pages 1-11, September.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:19:p:6116-:d:643279
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    References listed on IDEAS

    as
    1. Michail Michelarakis & Phillip Widger & Abderrahmane Beroual & Abderrahmane (Manu) Haddad, 2019. "Electrical Detection of Creeping Discharges over Insulator Surfaces in Atmospheric Gases under AC Voltage Application," Energies, MDPI, vol. 12(15), pages 1-15, August.
    2. Wenxia Sima & Fusheng Guo & Qing Yang & Tao Yuan, 2012. "Calculation of the Arc Velocity Along the Polluted Surface of Short Glass Plates Considering the Air Effect," Energies, MDPI, vol. 5(3), pages 1-20, March.
    3. 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.
    4. Xinhan Qiao & Zhijin Zhang & Xingliang Jiang & Tian Liang, 2019. "Influence of DC Electric Fields on Pollution of HVDC Composite Insulator Short Samples with Different Environmental Parameters," Energies, MDPI, vol. 12(12), pages 1-12, June.
    5. Mohammed El Amine Slama & Maurizio Albano & Abderrahmane Manu Haddad & Ronald T. Waters & Oliver Cwikowski & Ibrahim Iddrissu & Jon Knapper & Oliver Scopes, 2021. "Monitoring of Dry Bands and Discharge Activities at the Surface of Textured Insulators with AC Clean Fog Test Conditions," Energies, MDPI, vol. 14(10), pages 1-17, May.
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