Modeling and Measurements of Electric Fields in Composite Oil/Cellulose Insulation

Author

Gäfvert, Uno ; Hjortstam, Olof ; Serdyuk, Yuriy ; Törnkvist, Christer ; Walfridsson, Lars

Author_Institution

ABB Corporate Res., Vasteras

fYear

2006

fDate

15-18 Oct. 2006

Firstpage

154

Lastpage

157

Abstract

In this paper we report on basic studies of the electric fields under DC stress in a composite insulation consisting of transformer oil and oil-impregnated pressboard, typical for HVDC converter transformers. The time dependent electrical fields in our model geometry are measured using electro-optic Kerr method, and theoretically studied with an ion drift-diffusion conduction model. The measured and calculated electrical fields are compared and analyzed.

Keywords

HVDC power convertors; composite insulating materials; electric fields; transformer oil; transformers; DC stress; HVDC converter transformers; composite insulation; composite oil-cellulose insulation; electrooptic Kerr method; ion drift-diffusion conduction model; oil-impregnated pressboard; time dependent electrical fields; transformer oil; Dielectrics and electrical insulation; Electric variables measurement; Geometry; HVDC transmission; Oil insulation; Petroleum; Power transformer insulation; Solid modeling; Stress; Time measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 2006 IEEE Conference on

Conference_Location

Kansas City, MO

Print_ISBN

1-4244-0546-7

Electronic_ISBN

1-4244-0547-5

Type

conf

DOI

10.1109/CEIDP.2006.312084

Filename

4105392