KIEE - The Transactions of the Korean Institute of Electrical Engineers

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The Transactions of the Korean Institute of Electrical Engineers

The Transactions of the Korean Institute of Electrical Engineers

ISO Journal TitleTrans. Korean. Inst. Elect. Eng.

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Title	A Study on Corona Inception Voltage and Dielectric Characteristics of Thermally Aged Mineral and Vegetable Insulation Oil in Medium Voltage Power Transformer
Authors	정중일(Jeong, Jung-Il) ; 허창수(Huh, Chang-Su)
DOI	https://doi.org/10.5370/KIEE.2017.66.12.1745
Page	pp.1745-1750
ISSN	1975-8359
Keywords	Oil immersed transformer ; Vegetable oil ; Mineral oil ; Corona inception voltage ; AC breakdown voltage
Abstract	Starting from the distribution transformer, the insulation oil for the oil immersed power transformer is being used to convert the vegetable oil from the existing mineral oil. Vegetable oil is better in temperature characteristics and insulation performance, is not toxic, and has better biodegradable characteristic than that of mineral oil. In order to investigate the corona inception voltage and dieclectic charateristics of the two insulating oils, three oil immersed transformers using mineral oil and vegetable oil were made and thermal cyclic aged. In this paper, the changes in the corona discharge inception voltage, chemical and electrical properties of the two sampled insulating oils from the transformers had been studied.

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