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Influence of Molecule Structure on Lightning Impulse Breakdown of Ester Liquids

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  • Huaqiang Li

    (State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China)

  • Linfeng Xia

    (State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China)

  • Shengwei Cai

    (State Key Laboratory of Power Grid Environmental Protection, China Electric Power Research Institute Wuhan Branch, Wuhan 430074, China)

  • Zhiqiang Huang

    (Transformer Division CHINT Electric Co., Ltd., Shanghai 201614, China)

  • Jiaqi Li

    (Department of Smart Grid Information Engineering, School of Electrical Engineering, Hefei University of Technology, Hefei 230009, China)

  • Lisheng Zhong

    (State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China)

Abstract

Ester liquids are environmentally friendly insulating oils, and they can be used as an alternative to mineral oil in transformers, even though in most countries spills of ester oils must be treated like spills of mineral oil. Furthermore, the breakdown characteristics of ester liquids are worse than those of mineral oils in heterogeneous electric fields. In this paper, we present a comprehensive experimental research on both positive and negative lightning impulse breakdown properties in point-plane geometries with gaps varying from 1 mm to 50 mm. The breakdown voltages and streamer velocities of five kinds of ester liquids, including natural ester, synthetic ester, and three kinds of single component esters have been measured. The results show that the double bonds have no effect on the breakdown voltage of ester liquids. The average streamer velocities of mono-esters are faster than that of other esters under positive polarity, and the breakdown voltages of all esters are close.

Suggested Citation

  • Huaqiang Li & Linfeng Xia & Shengwei Cai & Zhiqiang Huang & Jiaqi Li & Lisheng Zhong, 2021. "Influence of Molecule Structure on Lightning Impulse Breakdown of Ester Liquids," Energies, MDPI, vol. 14(4), pages 1-15, February.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:4:p:1061-:d:501213
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    References listed on IDEAS

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    1. Stephanie Haegele & Farzaneh Vahidi & Stefan Tenbohlen & Kevin J. Rapp & Alan Sbravati, 2018. "Lightning Impulse Withstand of Natural Ester Liquid," Energies, MDPI, vol. 11(8), pages 1-13, July.
    2. Maciej Zdanowski, 2020. "Electrostatic Charging Tendency Analysis Concerning Retrofilling Power Transformers with Envirotemp FR3 Natural Ester," Energies, MDPI, vol. 13(17), pages 1-11, August.
    3. Pawel Rozga, 2016. "Streamer Propagation and Breakdown in a Very Small Point-Insulating Plate Gap in Mineral Oil and Ester Liquids at Positive Lightning Impulse Voltage," Energies, MDPI, vol. 9(6), pages 1-12, June.
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    Cited by:

    1. Huseyin R. Hiziroglu, 2023. "A Special Issue: Electric Machinery and Transformers," Energies, MDPI, vol. 16(15), pages 1-3, July.

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