Analyses of the insulating characteristics of mineral oil at operating conditions

Experimental data on the electrical insulation in mineral oil are important for the optimal design of high voltage equipment in industrial power systems. In this paper, dielectric properties of mineral oil including breakdown voltage, dielectric dissipation factor, dielectric losses, relative permit...

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Bibliographic Details
Published in:Electrical engineering 2018-03, Vol.100 (1), p.321-331
Main Authors: Taslak, Eyup, Arikan, Oktay, Kumru, Celal Fadil, Kalenderli, Ozcan
Format: Article
Language:English
Subjects:
Breakdowns
Dielectric breakdown
Dielectric properties
Dissipation factor
Economics and Management
Electric potential
Electric power systems
Electrical Engineering
Electrical insulation
Electrical Machines and Networks
Electrical resistivity
Electrodes
Energy Policy
Engineering
Mineral oils
Original Paper
Permittivity
Power Electronics
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Summary:Experimental data on the electrical insulation in mineral oil are important for the optimal design of high voltage equipment in industrial power systems. In this paper, dielectric properties of mineral oil including breakdown voltage, dielectric dissipation factor, dielectric losses, relative permittivity and resistivity were analyzed. Effects of electrode system, distance between electrodes and the rate of voltage rise on dielectric properties of insulating oil were evaluated in accordance with ASTM D877 and ASTM D1816 standards. Breakdown voltages of insulating oil measured using both VDE (Verband Deutscher Elektrotechniker) electrodes and disk electrodes were compared in conformity with measurement standards. Measurements of dissipation factor, dielectric losses and relative permittivity were performed with IEC 60247 standard considering environmental temperature, applied voltage, power and higher frequency values that satisfy operating conditions. Resistivity of mineral oil also was calculated by using the results of the measurements. In the study, a detailed analysis of mineral oil at real operating conditions was realized. These results contribute to explore insulating characteristic of mineral oil in service.
ISSN:0948-7921
1432-0487
DOI:10.1007/s00202-016-0501-3