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Fourier Transform Infrared (FTIR) Spectroscopy Analysis of Transformer Paper in Mineral Oil-Paper Composite Insulation under Accelerated Thermal Aging

Author

Listed:
  • Abi Munajad

    (School of Electrical Engineering and Informatics, Institut Teknologi Bandung, Bandung 40132, Indonesia)

  • Cahyo Subroto

    (School of Electrical Engineering and Informatics, Institut Teknologi Bandung, Bandung 40132, Indonesia)

  • Suwarno

    (School of Electrical Engineering and Informatics, Institut Teknologi Bandung, Bandung 40132, Indonesia)

Abstract

Mineral oil is the most popular insulating liquid for high voltage transformers due to its function as a cooling liquid and an electrical insulator. Kraft paper has been widely used as transformer solid insulation for a long time already. The degradation process of transformer paper due to thermal aging in mineral oil can change the physical and chemical structure of the cellulose paper. Fourier transform infrared (FTIR) spectroscopy analysis was used to identify changes in the chemical structure of transformer paper aged in mineral oil. FTIR results show that the intensity of the peak absorbance of the O–H functional group decreased with aging but the intensity of the peak absorbance of the C–H and C=O functional groups increased with aging. Changes in the chemical structure of the cellulose paper during thermal aging in mineral oil can be analyzed by an oxidation process of the cellulose paper and the reaction process between the carboxylic acids in the mineral oil and the hydroxyl groups on the cellulose. The correlation between the functional groups and the average number of chain scissions of transformer paper gives initial information that the transformer paper performance can be identified by using a spectroscopic technique as a non-destructive diagnostic technique.

Suggested Citation

  • Abi Munajad & Cahyo Subroto & Suwarno, 2018. "Fourier Transform Infrared (FTIR) Spectroscopy Analysis of Transformer Paper in Mineral Oil-Paper Composite Insulation under Accelerated Thermal Aging," Energies, MDPI, vol. 11(2), pages 1-12, February.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:2:p:364-:d:130186
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    References listed on IDEAS

    as
    1. Rahman A. Prasojo & Karunika Diwyacitta & Suwarno & Harry Gumilang, 2017. "Transformer Paper Expected Life Estimation Using ANFIS Based on Oil Characteristics and Dissolved Gases (Case Study: Indonesian Transformers)," Energies, MDPI, vol. 10(8), pages 1-18, August.
    2. Abi Munajad & Cahyo Subroto & Suwarno, 2017. "Study on the Effects of Thermal Aging on Insulating Paper for High Voltage Transformer Composite with Natural Ester from Palm Oil Using Fourier Transform Infrared Spectroscopy (FTIR) and Energy Disper," Energies, MDPI, vol. 10(11), pages 1-15, November.
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    Cited by:

    1. Leila Safiddine & Hadj-Ziane Zafour & Ungarala Mohan Rao & Issouf Fofana, 2019. "Regeneration of Transformer Insulating Fluids Using Membrane Separation Technology," Energies, MDPI, vol. 12(3), pages 1-13, January.
    2. Md. Alhaz Uddin & Sk. Yasir Arafat Siddiki & Shams Forruque Ahmed & Zahidul Islam Rony & M. A. K. Chowdhury & M. Mofijur, 2021. "Estimation of Sustainable Bioenergy Production from Olive Mill Solid Waste," Energies, MDPI, vol. 14(22), pages 1-11, November.

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