Title :
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
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;
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
DOI :
10.1109/CEIDP.2006.312084
