Space Charge Characteristics of Natural Ester Oil-Impregnated Paper With Different Moisture Contents

Yoon, Hyungjin; Chen, George

doi:10.1109/tdei.2022.3202740

Cited by 10 publications

(1 citation statement)

References 17 publications

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“…Then, the degassed Kraft papers were respectively impregnated with degassed natural ester oil and mineral oil for 24 hours in a vacuum oven. Afterwards, samples were thermally aged by heating them to 130°C in a vacuum oven [9]. When each sample attained the specified ageing durations (0 days, 5 days, 10 days, 15 days, and 30 days), it was removed from the vacuum oven for the rest of the measurements.…”

Section: A Sample Preparationmentioning

confidence: 99%

Influence of Thermal Aging on Dielectric Properties of Natural Ester Oil-Impregnated Paper

Yoon

Chen

Hosier

2023

IEEE Trans. Dielect. Electr. Insul.

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Mineral oil is widely used as a dielectric liquid in high voltage direct-current (HVDC) converter transformers because of its excellent electrical insulating and cooling properties. Due to the low biodegradability and high fire risk of mineral oil, natural ester oil is gaining considerable interest as a potential alternative for HVDC converter transformers. This requires more information thorough understanding of the electrical behaviours of natural ester oil under various conditions. This paper compares the impact of thermal ageing on the space charge characteristics of natural ester oil-impregnated paper to mineral oilimpregnated paper. During thermal ageing, although the increased acidity caused by the natural ester oil led to more charge accumulation in natural ester oil-impregnated paper compared to the mineral oil, the natural oil-impregnated paper showed a higher DC breakdown voltage.

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Section: A Sample Preparationmentioning

confidence: 99%