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The Effect of a Vertical Electric Field on the Surface Flashover Characteristics of a Bushing Model

Author

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  • Mingxi Zhu

    (Laboratory of Advanced Technology of Electrical Engineering and Energy, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, Guangdong, China)

  • Liming Wang

    (Laboratory of Advanced Technology of Electrical Engineering and Energy, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, Guangdong, China)

  • Fanghui Yin

    (Laboratory of Advanced Technology of Electrical Engineering and Energy, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, Guangdong, China)

  • Masoud Farzaneh

    (Applied Science, Université du Québec à Chicoutimi (UQAC), 555 Boulevard de l’Université, Chicoutimi, QC G7H 2B1, Canada)

  • Hongwei Mei

    (Laboratory of Advanced Technology of Electrical Engineering and Energy, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, Guangdong, China)

  • Lu Wen

    (Laboratory of Advanced Technology of Electrical Engineering and Energy, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, Guangdong, China)

Abstract

High-voltage bushings play a crucial role in energy conveyance. Their specialized electric structure makes the bushing more vulnerable to surface discharge. However, the influence of a vertical electric field on the surface flashover of bushing structures remains unclear. To investigate this mechanism, four simplified bushing samples were built and the influence of pollution, leakage length, and the electric field component vertical to the dielectric surface on flashover properties of the bushing samples were tested. It was found that the surface pollution level was the decisive factor that influenced flashover voltage. When the leakage length and form factor were the same, the pollution flashover of the bushing structure was lower than that of the post structure. It was also found that increasing the leakage length was not very effective in improving the flashover voltage of bushings when the equivalent salt deposit density (ESDD) was high. No obvious correlation was found between pollution flashover voltage and electric field stress. Furthermore, the uneven wetting flashover performance of the bushings was tested. Under this condition, the flashover voltage decreased with an increase of the electric field component vertical to the dielectric surface. In addition, the electric field distribution of the samples was calculated and the results were in accordance with the experimental results.

Suggested Citation

  • Mingxi Zhu & Liming Wang & Fanghui Yin & Masoud Farzaneh & Hongwei Mei & Lu Wen, 2018. "The Effect of a Vertical Electric Field on the Surface Flashover Characteristics of a Bushing Model," Energies, MDPI, vol. 11(6), pages 1-14, June.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:6:p:1607-:d:153401
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    References listed on IDEAS

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    1. Feng Yang & Lin Du & Lijun Yang & Chao Wei & Youyuan Wang & Liman Ran & Peng He, 2018. "A Parameterization Approach for the Dielectric Response Model of Oil Paper Insulation Using FDS Measurements," Energies, MDPI, vol. 11(3), pages 1-17, March.
    2. Bo Qi & Quanmin Dai & Chengrong Li & Zipeng Zeng & Mingli Fu & Ran Zhuo, 2018. "The Mechanism and Diagnosis of Insulation Deterioration Caused by Moisture Ingress into Oil-Impregnated Paper Bushing," Energies, MDPI, vol. 11(6), pages 1-12, June.
    3. Youyuan Wang & Kun Xiao & Bijun Chen & Yuanlong Li, 2015. "Study of the Impact of Initial Moisture Content in Oil Impregnated Insulation Paper on Thermal Aging Rate of Condenser Bushing," Energies, MDPI, vol. 8(12), pages 1-13, December.
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    Cited by:

    1. Hao Tang & Guangning Wu & Ming Chen & Jiang Deng & Xining Li, 2019. "Analysis and Disposal of Typical Breakdown Failure for Resin Impregnated Paper Bushing in the Valve Side of HVDC Converter Transformer," Energies, MDPI, vol. 12(22), pages 1-13, November.
    2. Ming Chen & Xuandong Liu & Chengjun Liang & Yi Zhao & Hao Tang, 2019. "Study on Surface Charge Accumulation Characteristics of Resin Impregnated Paper Wall Bushing Core Under Positive DC Voltage," Energies, MDPI, vol. 12(23), pages 1-14, November.

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