Time domain measurements of dielectric response in oil-paper insulation systems

Author

Houhanessian, Vahe Der ; Zaengl, Walter S.

Author_Institution

High Voltage Lab., Swiss Federal Inst. of Technol., Zurich, Switzerland

Volume

1

fYear

1996

fDate

16-19 Jun 1996

Firstpage

47

Abstract

The results of dielectric response measurements in the time and frequency domain on homogeneous impregnated pressboard and on series arrangements of pressboard sheets and oil ducts are presented. A simple equivalent circuit is proposed to model oil-paper insulation systems for single impregnated pressboard sheets as well as for multi-layer arrangements. This equivalent circuit which is derived from relaxation current measurements is then used to calculate recovery voltages as well as the frequency-dependent permittivity. Finally it is shown that the same procedure can be applied to quantify the dielectric response properties on high voltage power transformers

Keywords

electric breakdown; equivalent circuits; insulation testing; paper; power transformer insulation; power transformer testing; transformer oil; dielectric response properties; equivalent circuit; frequency-dependent permittivity; high voltage power transformers; homogeneous impregnated pressboard; insulation breakdown tests; multi-layer arrangements; oil ducts; oil-paper insulation systems; pressboard sheets; recovery voltages; relaxation current measurements; time domain measurements; Current measurement; Dielectric measurements; Dielectrics and electrical insulation; Ducts; Equivalent circuits; Frequency domain analysis; Frequency measurement; Oil insulation; Petroleum; Time measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 1996., Conference Record of the 1996 IEEE International Symposium on

Conference_Location

Montreal, Que.

ISSN

1089-084X

Print_ISBN

0-7803-3531-7

Type

conf

DOI

10.1109/ELINSL.1996.549280

Filename

549280