Title :
Charge behavior in Palm Fatty Acid Ester Oil (PFAE) / Pressboard composite insulation system with charged oil flow
Author :
Saito, Hikaru ; Okubo, Hitoshi ; Kojima, Hiroki ; Hayakawa, Naoki ; Kato, Katsumi ; Kawanishi, Keizo ; Koide, Hidenobu
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Nagoya Univ., Nagoya, Japan
Abstract :
Palm Fatty Acid Ester Oil (PFAE) is expected as one of the substitutes for mineral oil of transformers owing to not only the high biodegradation but also the good insulation performance. In this paper, the electric field strength and its time transition in PFAE / Pressboard composite insulation system??under charged oil flow were directly measured by using Kerr electro-optic technique. We found that the electric field was generated by space charges in PFAE and was temporally changed with charge behavior. By comparison with high charging mineral oil, we clarified that the feature of the charge behavior in PFAE was similar to that in the mineral oil, but the behavior of electric field was different due to the variation of electric properties such as permittivity, relaxing time and charge density.
Keywords :
Kerr electro-optical effect; composite insulating materials; electric field measurement; flow measurement; power transformer insulation; space charge; transformer oil; Kerr electrooptic technique; PFAE; biodegradation; charge behavior; charge oil flow; electric property; electric strength; flow measurement; palm fatty acid ester oil; permittivity; pressboard composite insulation system; space charge density; transformer insulation; transformer mineral oil; Electric fields; Electric variables measurement; Electrodes; Minerals; Oil insulation; Power transformer insulation; Space charge; Flow electrification; Insulating oil; Palm Fatty Acid Ester; Transformer;
Conference_Titel :
Dielectric Liquids (ICDL), 2011 IEEE International Conference on
Conference_Location :
Trondheim
Print_ISBN :
978-1-4244-7352-6
Electronic_ISBN :
2153-3725
DOI :
10.1109/ICDL.2011.6015445
