Exploring the electrical properties of pressboard and kraft paper insulation in power transformers: A dielectric spectroscopy and principal component analysis approach

Souhaib Cherrak; Tahar Seghier; Ali Benghia; Felipe Araya Machuca; Augustin Mpanda Mabwe; Souraya Goumri-Said; Souhaib Cherrak; Tahar Seghier; Ali Benghia; Felipe Araya Machuca; Augustin Mpanda Mabwe; Souraya Goumri-Said

doi:10.3934/environsci.2024041

AIMS Environmental Science

2024, Volume 11, Issue 5: 831-846. doi: 10.3934/environsci.2024041

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Research article

Exploring the electrical properties of pressboard and kraft paper insulation in power transformers: A dielectric spectroscopy and principal component analysis approach

1.
Laboratoire d'étude et de développement des Matériaux Semiconducteurs et diélectriques (LeDMaSD), Algeria
2.
Laboratoire de Physique des Matériaux, University of Amar Telidji, Laghouat, BP 37G, Laghouat 03000, Algeria
3.
Laboratoire SYMADE, Institut Polytechnique UniLaSalle Amiens, 14 Quai de la Somme, 80082 Amiens, France
4.
Department of Physics, College of Science and General studies, Alfaisal University, P.O. Box 5092, Riyadh 11533, Saudi Arabia

Received: 21 June 2024 Revised: 02 September 2024 Accepted: 18 September 2024 Published: 24 September 2024

We explored the aging effects on insulating materials used in power transformers through dielectric spectroscopy. Frequency domain spectroscopy (FDS) was conducted for both aged and new Kraft paper and pressboard samples to determine their dielectric properties across a temperature range of 40–100 ℃ for pressboard and 40–70 ℃ for Kraft paper. Principal component analysis (PCA) was employed to classify the data, identify key factors contributing to variance, and elucidate the relationships between different parameters. The analysis revealed positive correlations between conductivity and frequency, as well as between permittivity and tan delta, with distinct differences in behavior observed between aged and new samples at lower frequencies. Additionally, the impact of temperature was evident, with increased temperature leading to an upward shift in dielectric behavior. At lower temperatures, aging had a reduced effect on the materials' properties. These findings provide significant insights into the dielectric behavior and aging mechanisms of insulation materials in power transformers.
- dielectric spectroscopy,
- frequency domain spectroscopy,
- aging,
- principal component analysis (PCA),
- paper insulation,
- power transformers
Citation: Souhaib Cherrak, Tahar Seghier, Ali Benghia, Felipe Araya Machuca, Augustin Mpanda Mabwe, Souraya Goumri-Said. Exploring the electrical properties of pressboard and kraft paper insulation in power transformers: A dielectric spectroscopy and principal component analysis approach[J]. AIMS Environmental Science, 2024, 11(5): 831-846. doi: 10.3934/environsci.2024041

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Abstract

We explored the aging effects on insulating materials used in power transformers through dielectric spectroscopy. Frequency domain spectroscopy (FDS) was conducted for both aged and new Kraft paper and pressboard samples to determine their dielectric properties across a temperature range of 40–100 ℃ for pressboard and 40–70 ℃ for Kraft paper. Principal component analysis (PCA) was employed to classify the data, identify key factors contributing to variance, and elucidate the relationships between different parameters. The analysis revealed positive correlations between conductivity and frequency, as well as between permittivity and tan delta, with distinct differences in behavior observed between aged and new samples at lower frequencies. Additionally, the impact of temperature was evident, with increased temperature leading to an upward shift in dielectric behavior. At lower temperatures, aging had a reduced effect on the materials' properties. These findings provide significant insights into the dielectric behavior and aging mechanisms of insulation materials in power transformers.

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