Title :
Kerr electro-optic measurement of electric field distribution in rapeseed ester oil and pressboard composite system
Author :
Nakamura, K. ; Kato, K. ; Koide, H. ; Fujii, K. ; Okubo, H.
Author_Institution :
Nagoya Univ., Japan
Abstract :
In oil-immersed power transformers, an insulating oil/pressboard (PB) composite insulation system is generally applied. In order to make power transformers more compact, it is necessary to optimize the insulation design with considering the charge behavior in liquid dielectrics. In addition, environment-friendly insulating oil for transformers is being interested. In this paper, we directly measured the electric field in parallel-plane electrodes and rapeseed ester oil/PB composite insulation system under dc voltage application using Kerr electro-optic technique. From the results, we compared the electric field in rapeseed ester oil with that in mineral oil and discussed the charge behavior in composite system. Finally, we confirmed the basic applicability of rapeseed ester oil for transformers.
Keywords :
Kerr electro-optical effect; composite materials; dielectric liquids; electric field measurement; electrodes; power transformer insulation; transformer oil; Kerr electro-optic measurement; electric field distribution; electric field measurement; insulating oil; liquid dielectrics; oil-immersed power transformers; parallel-plane electrodes; pressboard composite insulation system; rapeseed ester oil; transformer oil; Design optimization; Dielectric liquids; Dielectric measurements; Dielectrics and electrical insulation; Electric variables measurement; Interconnected systems; Oil insulation; Petroleum; Power transformer insulation; Power transformers;
Conference_Titel :
Dielectric Liquids, 2005. ICDL 2005. 2005 IEEE International Conference on
Print_ISBN :
0-7803-8954-9
DOI :
10.1109/ICDL.2005.1490111
