Title :
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
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;
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.2011.6015451
