Evolution of the electric field due to forced flow in oil pressboard ducts

Author

Schiessling, Joachim ; Forssén, Cecilia ; Walfridsson, Lars ; Törnkvist, Christer ; Gäfvert, Uno

Author_Institution

ABB Corp. Res., Västerås, Sweden

fYear

2011

fDate

26-30 June 2011

Firstpage

1

Lastpage

4

Abstract

The electrical insulation system of power transformers is a combination of mineral oil and pressboard materials. We have measured the influence of forced oil flow on the electric field stress in oil pressboard insulation system with applied DC potential using Kerr electro-optic effect. The data show a variation in the electric field strength in flow direction, depending on velocity, time and applied voltage. The observations are explained by variation in space charge distribution on the pressboard.

Keywords

Kerr electro-optical effect; power transformer insulation; space charge; transformer oil; DC potential; Kerr electro-optic effect; electric field evolution; electric field strength; electric field stress; forced flow; forced oil flow; mineral oil; oil pressboard duct; oil pressboard insulation system; power transformer electrical insulation system; pressboard material; space charge distribution; Ducts; Electric fields; Ions; Power transformer insulation; Space charge; Voltage measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Dielectric Liquids (ICDL), 2011 IEEE International Conference on

Conference_Location

Trondheim

ISSN

2153-3725

Print_ISBN

978-1-4244-7352-6

Electronic_ISBN

2153-3725

Type

conf

DOI

10.1109/ICDL.2011.6015451

Filename

6015451