Investigation of charge behavior in flowing transformer oil/pressboard composite insulation system by electro-optic field measurement

Author

Okubo, H. ; Hashiba, Y. ; Kato, K. ; Shimizu, R. ; Nakagami, Y. ; Miyamoto, M.

Author_Institution

Nagoya Univ., Japan

Volume

2

fYear

2000

fDate

2000

Firstpage

732

Abstract

Electrostatic charging may occur in oil immersed power transformers because of a flow electrification phenomenon. In order to discuss the charge behavior, we directly measured DC electric field in the oil/pressboard composite insulation system using Kerr electro-optic field measurement method under oil flowing conditions. As a result, even if no voltage was applied, the electric field emerged because of space charge in oil and charge accumulation on pressboard. We changed the flow rate of oil, the arrangement of pressboard barrier, and the applied voltage as parameters. We discussed experimental results from the viewpoint of charge behavior and generated field distribution

Keywords

Kerr electro-optical effect; electric field measurement; electrostatics; paper; power transformer insulation; space charge; transformer oil; DC electric field measurement; Kerr electro-optic field measurement method; charge accumulation; charge behavior; electro-optic field measurement; electrostatic charging; flow electrification; flowing transformer oil; pressboard insulation; space charge; transformer oil/pressboard composite insulation system; Charge measurement; Current measurement; Dielectrics and electrical insulation; Electric variables measurement; Electrostatic measurements; Oil insulation; Petroleum; Power transformer insulation; Power transformers; Space charge;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 2000. Conference Record of the 2000 IEEE

Conference_Location

Rome

ISSN

0197-2618

Print_ISBN

0-7803-6401-5

Type

conf

DOI

10.1109/IAS.2000.881911

Filename

881911