DocumentCode :
2758621
Title :
Charge behavior in Palm Fatty Acid Ester Oil (PFAE) / pressboard composite insulation system under voltage application
Author :
Kojima, Hiroki ; Hayakawa, Naoki ; Okubo, Hitoshi ; Kato, Katsumi ; Kawanishi, Keizo ; Koide, Hidenobu
Author_Institution :
EcoTopia Sci. Inst., Nagoya Univ., Nagoya, Japan
fYear :
2012
fDate :
10-13 June 2012
Firstpage :
419
Lastpage :
423
Abstract :
Palm Fatty Acid Ester Oil (PFAE) is one of the most promising environment-friendly biodegradable insulating oils for transformers. PFAE has significant advantages compared to other vegetable origin insulating oils and mineral oil, e.g. not only good insulation performance, high permittivity and high moisture tolerance, but also excellent cooling ability due to low kinematic viscosity, high thermal and chemical stability and high productivity. However, since the molecular content of PFAE is quite different from mineral oil, the fundamental charge behavior in PFAE has not been clarified yet. To clarify the temporal and spatial charge behavior in PFAE, we directly measured the electric field in oil duct model with PFAE / pressboard (PB) composite insulation system under dc voltage application and charged flow condition by using Kerr electrooptic field measurement technique. By the comparison of electric field and charge behavior characteristics with fresh and degraded mineral oil, we revealed that the essential mechanism of charge behavior is similar, but the difference in temporal and spatial characteristics is attributed to the higher intrinsic ion density and higher permittivity of PFAE than that of mineral oil.
Keywords :
electric field measurement; essential oils; ion density; permittivity; transformer oil; vegetable oils; DC voltage application; Kerr electrooptic field measurement technique; PFAE molecular content; PFAE-PB composite insulation system; charged flow condition; chemical stability; cooling ability; electric field measurement; environment-friendly biodegradable insulating oils; essential mechanism; intrinsic ion density; kinematic viscosity; mineral oil; moisture tolerance; oil duct model; palm fatty acid ester oil; permittivity; pressboard composite insulation system; spatial charge behavior; temporal charge behavior; thermal stability; transformers; vegetable origin insulating oils; Electric fields; Electrodes; Minerals; Oil insulation; Permittivity; Power transformer insulation; Kerr electro-optic measurement; electric field; insulating oil; palm fatty acid ester; space charge; transformer;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical Insulation (ISEI), Conference Record of the 2012 IEEE International Symposium on
Conference_Location :
San Juan, PR
ISSN :
1089-084X
Print_ISBN :
978-1-4673-0488-7
Electronic_ISBN :
1089-084X
Type :
conf
DOI :
10.1109/ELINSL.2012.6251502
Filename :
6251502
Link To Document :
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