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Modeling the Insulation Paper Drying Process from Thermogravimetric Analyses

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  • Amidou Betie

    (Research Chair on the Aging of Power Network Infrastructure (ViAHT), Université du Québec à Chicoutimi, Chicoutimi, QC G7H 2B1, Canada
    Département Génie Électrique et Électronique, Institut National Polytechnique Houphouët Boigny, BP 1093 Yamoussoukro, Côte d’Ivoire)

  • Fethi Meghnefi

    (Research Chair on the Aging of Power Network Infrastructure (ViAHT), Université du Québec à Chicoutimi, Chicoutimi, QC G7H 2B1, Canada)

  • Issouf Fofana

    (Research Chair on the Aging of Power Network Infrastructure (ViAHT), Université du Québec à Chicoutimi, Chicoutimi, QC G7H 2B1, Canada)

  • Zie Yeo

    (Département Génie Électrique et Électronique, Institut National Polytechnique Houphouët Boigny, BP 1093 Yamoussoukro, Côte d’Ivoire)

Abstract

It is now well-established that moisture in the oil paper insulation used in power and instrument transformers significantly reduces the transformers’ lifetimes, and can eventually lead to premature failure. This moisture should, therefore, always be removed, not only during production but also after repairs. At the final stage of manufacturing, the drying process should be carried out to remove water and air vacuoles contained in the cellulose-based paper before impregnation. Successful drying helps increase the residual life of transformers, because the presence of moisture and air vacuoles accelerates the aging/degradation process of the oil paper insulation. Proper estimation of residual moisture before impregnation and the determination of the time required for drying play key roles in the time-consuming process of drying. In this paper, the disadvantages of inadequate drying are addressed, followed by a mathematical approach to model the paper drying process. A mathematical model describing the kinetics of drying according to temperature, initial moisture, paper weight, final moisture, and extraction rate is proposed. This model also estimated the amount of moisture removed at the end of the drying process.

Suggested Citation

  • Amidou Betie & Fethi Meghnefi & Issouf Fofana & Zie Yeo, 2018. "Modeling the Insulation Paper Drying Process from Thermogravimetric Analyses," Energies, MDPI, vol. 11(3), pages 1-15, February.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:3:p:517-:d:133875
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    References listed on IDEAS

    as
    1. Issouf Fofana & Yazid Hadjadj, 2016. "Electrical-Based Diagnostic Techniques for Assessing Insulation Condition in Aged Transformers," Energies, MDPI, vol. 9(9), pages 1-26, August.
    2. 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.
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    Cited by:

    1. Piotr Przybylek & Jaroslaw Gielniak, 2023. "The Use of Methanol Vapour for Effective Drying of Cellulose Insulation," Energies, MDPI, vol. 16(11), pages 1-11, May.
    2. Piotr Przybylek & Hubert Moranda & Hanna Moscicka-Grzesiak & Mateusz Cybulski, 2020. "Laboratory Model Studies on the Drying Efficiency of Transformer Cellulose Insulation Using Synthetic Ester," Energies, MDPI, vol. 13(13), pages 1-11, July.
    3. 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.
    4. Piotr Przybylek & Hubert Moranda & Hanna Moscicka-Grzesiak & Dominika Szczesniak, 2019. "Application of Synthetic Ester for Drying Distribution Transformer Insulation—The Influence of Cellulose Thickness on Drying Efficiency," Energies, MDPI, vol. 12(20), pages 1-16, October.
    5. Issouf Fofana & U. Mohan Rao, 2018. "Engineering Dielectric Liquid Applications," Energies, MDPI, vol. 11(10), pages 1-4, October.
    6. Piotr Przybylek, 2018. "A New Concept of Applying Methanol to Dry Cellulose Insulation at the Stage of Manufacturing a Transformer," Energies, MDPI, vol. 11(7), pages 1-13, June.

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