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Effect of Temperature on Space Charge Distribution of Oil–Paper Insulation under DC and Polarity Reversal Voltage

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  • Qingguo Chen

    (Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, 52 Xuefu Road, Harbin 150080, China
    The School of Electrical and Electronics Engineering, Harbin University of Science and Technology, 52 Xuefu Road, Harbin 150080, China)

  • Jinfeng Zhang

    (Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, 52 Xuefu Road, Harbin 150080, China
    The School of Electrical and Electronics Engineering, Harbin University of Science and Technology, 52 Xuefu Road, Harbin 150080, China)

  • Minghe Chi

    (Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, 52 Xuefu Road, Harbin 150080, China
    The School of Electrical and Electronics Engineering, Harbin University of Science and Technology, 52 Xuefu Road, Harbin 150080, China)

  • Peng Tan

    (The School of Electrical and Electronics Engineering, Harbin University of Science and Technology, 52 Xuefu Road, Harbin 150080, China)

  • Wenxin Sun

    (The School of Electrical and Electronics Engineering, Harbin University of Science and Technology, 52 Xuefu Road, Harbin 150080, China)

Abstract

The electric field distortion caused by space charge is an important factor affecting the operation reliability of oil–paper insulation in a converter transformer. To study the accumulation and decay characteristics of the space charge within oil-impregnated pressboard under DC and polarity reversal voltage, and consider the possible operating conditions of the converter transformer, the space charge behavior of oil-impregnated pressboard was measured by the pulsed electro-acoustic (PEA) method in the temperature range from −20 °C to 60 °C. The effect of temperature on the accumulation and decay characteristics of space charge is also analyzed. The space charge accumulated within the pressboard at low temperature is mainly homocharge injected by the electrode, while heterocharge formed by ion dissociation counteracts some of the homocharge at high temperature. Thus, the space charge of pressboard first increases, then decreases, with an increase in temperature. However, slow decay of the space charge causes severe distortion of the electric field distribution in the pressboard during voltage polarity reversal.

Suggested Citation

  • Qingguo Chen & Jinfeng Zhang & Minghe Chi & Peng Tan & Wenxin Sun, 2018. "Effect of Temperature on Space Charge Distribution of Oil–Paper Insulation under DC and Polarity Reversal Voltage," Energies, MDPI, vol. 11(9), pages 1-13, August.
  • Handle: RePEc:gam:jeners:v:11:y:2018:i:9:p:2271-:d:166433
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    References listed on IDEAS

    as
    1. Jian Hao & Runhao Zou & Ruijin Liao & Lijun Yang & Qiang Liao, 2018. "New Method for Shallow and Deep Trap Distribution Analysis in Oil Impregnated Insulation Paper Based on the Space Charge Detrapping," Energies, MDPI, vol. 11(2), pages 1-16, January.
    2. Qingguo Chen & Jinfeng Zhang & Minghe Chi & Chong Guo, 2018. "Breakdown Characteristics of Oil-Pressboard Insulation under AC-DC Combined Voltage and Its Mathematical Model," Energies, MDPI, vol. 11(5), pages 1-13, May.
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    Cited by:

    1. Giuseppe Rizzo & Pietro Romano & Antonino Imburgia & Guido Ala, 2019. "Review of the PEA Method for Space Charge Measurements on HVDC Cables and Mini-Cables," Energies, MDPI, vol. 12(18), pages 1-23, September.

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