Title :
Measurement and modeling of dielectric response of composite oil/paper insulation
Author :
Frimpong, George ; Gäfvert, Uno ; Fuhr, Jitka
Author_Institution :
ABB Transmission Technol. Inst., Raleigh, NC, USA
Abstract :
Moisture and aging strongly influence the dielectric properties of oil/cellulose insulation systems. Dielectric measurements can therefore be used for assessing the condition of the oil/paper insulation. In this paper, we report on measurements and modeling of recovery voltages and polarization and depolarization current measurements on composite oil/paper insulation. A numerical model allows us to model the response of the composite system from knowledge of the dielectric properties of the constituents (oil and paper). In particular we demonstrate the consistency between recovery voltages and polarization and depolarization current measurements and show the influence of material properties on dielectric response
Keywords :
ageing; composite insulating materials; dielectric depolarisation; dielectric measurement; dielectric polarisation; environmental degradation; insulating oils; moisture; paper; aging; composite oil/paper insulation; depolarization current measurements; dielectric properties; dielectric response; material properties; moisture; numerical model; oil/cellulose insulation systems; polarization current measurements; recovery voltages; Aging; Current measurement; Dielectric measurements; Dielectrics and electrical insulation; Moisture; Numerical models; Oil insulation; Petroleum; Polarization; Voltage;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1997., Proceedings of the 5th International Conference on
Conference_Location :
Seoul
Print_ISBN :
0-7803-2651-2
DOI :
10.1109/ICPADM.1997.617534
