Title :
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
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;
Conference_Titel :
Electrical Insulation, 1996., Conference Record of the 1996 IEEE International Symposium on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-3531-7
DOI :
10.1109/ELINSL.1996.549280
