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Influence of Aging on Oil Degradation and Gassing Tendency for Mineral oil and Synthetic Ester under Low Energy Discharge Electrical Faults

Author

Listed:
  • L. Loiselle

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

  • U. Mohan Rao

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

  • I. Fofana

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

Abstract

The intent of this work is to understand the influence of low energy discharge electric faults in mineral oil and synthetic esters on liquid degradation and gassing tendency at different aging conditions (based on acidity values). A low energy discharge electric fault has been created by continuous discharge of 9 kV for five hours on the liquid surface using a suitable laboratory setup. Liquid degradation is reported by adopting UV spectroscopy, turbidity, and particle counter measurements. The gassing tendency is understood by dissolved gas analysis using Duval’s triangle and Duval’s pentagon methods for mineral oil and non-mineral oils accordingly. It is observed that the influence of low energy discharges on liquid degradation is higher in mineral oils than synthetic esters. The fault gasses in mineral oil are involved with electrical and thermal faults accompanied by stray gassing whereas only partial discharge activity is noticed for synthetic esters. Importantly, the existence of low energy discharge faults like corona discharges will involve a generation of excess high molecular weight products as compared to low molecular weight products that are soluble in liquid volume.

Suggested Citation

  • L. Loiselle & U. Mohan Rao & I. Fofana, 2020. "Influence of Aging on Oil Degradation and Gassing Tendency for Mineral oil and Synthetic Ester under Low Energy Discharge Electrical Faults," Energies, MDPI, vol. 13(3), pages 1-12, January.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:3:p:595-:d:313984
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    References listed on IDEAS

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    1. 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.
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    Cited by:

    1. Wiktor Kunikowski & Pawel Rozga & Bartlomiej Pasternak & Jakub Staniewski & Filip Stuchala & Konrad Strzelecki, 2024. "Impact of Electrode Distance in a Quasi-Uniform Model Electrode System on Lightning Impulse Breakdown Voltage in Various Insulating Liquids," Energies, MDPI, vol. 17(4), pages 1-18, February.
    2. Andrei Manea & Teodora Gorjanu & Andreea Lazeanu & Laurentiu Marius Dumitran, 2022. "Effect of Electrical Accelerated Aging on DC Resistivity of Mineral Oil Used in Power Transformers," Energies, MDPI, vol. 16(1), pages 1-12, December.
    3. Luc Loiselle & U. Mohan Rao & Issouf Fofana, 2020. "Gassing Tendency of Fresh and Aged Mineral Oil and Ester Fluids under Electrical and Thermal Fault Conditions," Energies, MDPI, vol. 13(13), pages 1-15, July.
    4. Belén García & Alfredo Ortiz & Carlos Renedo & Diego Fernando García & Andrés Montero, 2021. "Use Performance and Management of Biodegradable Fluids as Transformer Insulation," Energies, MDPI, vol. 14(19), pages 1-18, October.

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