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Effect of Moisture on the Thermal Conductivity of Cellulose and Aramid Paper Impregnated with Various Dielectric Liquids

Author

Listed:
  • Grzegorz Dombek

    (Institute of Electric Power Engineering, Poznan University of Technology, 60-965 Poznan, Poland)

  • Zbigniew Nadolny

    (Institute of Electric Power Engineering, Poznan University of Technology, 60-965 Poznan, Poland)

  • Piotr Przybylek

    (Institute of Electric Power Engineering, Poznan University of Technology, 60-965 Poznan, Poland)

  • Radoslaw Lopatkiewicz

    (Power Engineering Transformatory Sp. z o.o., 62-004 Czerwonak, Poland)

  • Agnieszka Marcinkowska

    (Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 3, 60-965 Poznan, Poland)

  • Lukasz Druzynski

    (Institute of Electric Power Engineering, Poznan University of Technology, 60-965 Poznan, Poland)

  • Tomasz Boczar

    (Institute of Electric Power Engineering and Renewable Energy, Opole University of Technology, Proszkowska 76, 45-758 Opole, Poland)

  • Andrzej Tomczewski

    (Institute of Electrical Engineering and Electronics, Poznan University of Technology, Piotrowo 3A, 60-965 Poznan, Poland)

Abstract

This paper presents the effect of the impact of moisture in paper insulation used as insulation of transformer windings on its thermal conductivity. Various types of paper (cellulose and aramid) and impregnated (mineral oil, synthetic ester, and natural ester) were tested. The impact of paper and impregnated types on the changes in thermal conductivity of paper insulation caused by an increase in moisture were analyzed. A linear equation, describing the changes in thermal conductivity due to moisture, for various types of paper and impregnated, was developed. The results of measuring the thermal conductivity of paper insulation depending on the temperature are presented. The aim of the study is to develop an experimental database to better understand the heat transport inside transformers to assess aging and optimize their performance.

Suggested Citation

  • Grzegorz Dombek & Zbigniew Nadolny & Piotr Przybylek & Radoslaw Lopatkiewicz & Agnieszka Marcinkowska & Lukasz Druzynski & Tomasz Boczar & Andrzej Tomczewski, 2020. "Effect of Moisture on the Thermal Conductivity of Cellulose and Aramid Paper Impregnated with Various Dielectric Liquids," Energies, MDPI, vol. 13(17), pages 1-17, August.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:17:p:4433-:d:405055
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    References listed on IDEAS

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    1. Wojciech Sikorski & Krzysztof Walczak & Piotr Przybylek, 2016. "Moisture Migration in an Oil-Paper Insulation System in Relation to Online Partial Discharge Monitoring of Power Transformers," Energies, MDPI, vol. 9(12), pages 1-16, December.
    2. Vadzim I. Nikitsin & Abdrahman Alsabry & Valery A. Kofanov & Beata Backiel-Brzozowska & Paweł Truszkiewicz, 2020. "A Model of Moist Polymer Foam and a Scheme for the Calculation of Its Thermal Conductivity," Energies, MDPI, vol. 13(3), pages 1-11, January.
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    6. Janvier Sylvestre N’cho & Issouf Fofana & Yazid Hadjadj & Abderrahmane Beroual, 2016. "Review of Physicochemical-Based Diagnostic Techniques for Assessing Insulation Condition in Aged Transformers," Energies, MDPI, vol. 9(5), pages 1-29, May.
    7. Chen Wang & Jie Wu & Jianzhou Wang & Weigang Zhao, 2016. "Reliability Analysis and Overload Capability Assessment of Oil-Immersed Power Transformers," Energies, MDPI, vol. 9(1), pages 1-19, January.
    8. 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.
    9. Guoqiang Xia & Guangning Wu & Bo Gao & Haojie Yin & Feibao Yang, 2017. "A New Method for Evaluating Moisture Content and Aging Degree of Transformer Oil-Paper Insulation Based on Frequency Domain Spectroscopy," Energies, MDPI, vol. 10(8), pages 1-15, August.
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