Title :
Fundamental property of electric field in rapeseed ester oil based on Kerr electro-optic measurement
Author :
Nakamura, K. ; Kato, K. ; Koide, H. ; Hatta, Y. ; Okubo, H.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Nagoya Univ.
fDate :
6/1/2006 12:00:00 AM
Abstract :
In the future, environmentally friendly insulating oil such as rapeseed ester oil is expected to be utilized as a substitute for mineral oil for power transformers. In addition, electrical insulation design for transformers becomes more important regarding size reduction and enhancement of electric field stress. The fundamental property of the electric field distribution in the rapeseed ester oil and in the oil/solid dielectrics composite insulation system should be clarified. In this paper, we have directly measured the electric field in the rapeseed ester oil with parallel-plane electrode and the rapeseed ester oil/pressboard (PB) composite insulation systems under DC voltage application using the Kerr electro-optic technique. From the results, we compared measurements of electric field and charge behavior for the rapeseed ester oil and the mineral oil and confirmed the applicability of the rapeseed ester oil for use in transformers
Keywords :
Kerr electro-optical effect; composite insulating materials; dielectric materials; electric field measurement; electrodes; power transformer insulation; transformer oil; Kerr electro-optic measurement; charge behavior; composite insulation system; electric field distribution; electric field measurement; mineral oil; oil-solid dielectric; parallel-plane electrode; power transformer; rapeseed ester oil; Dielectric measurements; Dielectrics and electrical insulation; Electric variables measurement; Minerals; Oil insulation; Petroleum; Power transformer insulation; Power transformers; Solids; Stress;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
DOI :
10.1109/TDEI.2006.1657974
