Mechanism of charge accumulation at flowing oil/pressboard interface based on optical measurement of electric field

Author

Inoue, N. ; Kato, K. ; Shimizu, R. ; Nakagami, Y. ; Iwai, H. ; Okubo, H.

Author_Institution

Nagoya Univ., Japan

fYear

2001

fDate

2001

Firstpage

536

Lastpage

539

Abstract

Electrostatic charging may occur in oil immersed power transformers because of a flow electrification phenomenon. In this paper, we directly measured time dependence of electric field strength in the flowing oil using an electro-optic method based on the Kerr effect, to clarify the mechanism of charge accumulation at the flowing oil/pressboard (PB) interface. We quantitatively discussed measurement results from the viewpoint of charge behavior. Finally, we found the contribution volume of charge movement and quantified the charge density

Keywords

power transformer insulation; power transformer testing; static electrification; transformer oil; Kerr effect; charge accumulation; charge behavior; charge density; contribution volume; electric field; electric field strength; electrostatic charging; flow electrification phenomenon; flowing oil/pressboard interface; oil immersed power transformers; optical measurement; time dependence; Charge measurement; Current measurement; Dielectrics and electrical insulation; Electric variables measurement; Electrodes; Fluid flow measurement; Kerr effect; Oil insulation; Petroleum; Power transformer insulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 2001 Annual Report. Conference on

Conference_Location

Kitchener, Ont.

Print_ISBN

0-7803-7053-8

Type

conf

DOI

10.1109/CEIDP.2001.963599

Filename

963599