Title :
Diagnosis of Moisture in Oi /Paper Distribution Cables, Part II: Water Penetration in Cable Insulation (Experiment and Modeling)
Author :
Neimanis, Roberts ; Eriksson, Roland ; Papazyan, Ruslan
Author_Institution :
Programma Electric AB; Royal Institute of Technology
Abstract :
Dynamics of water penetration in mass impregnated cable insulation has been studied. For experimental purposes, artificial damage was inflicted to a 40 cm long cable sample, and water ingress has been monitored continuously by frequency response measurements. A similar experiment was conducted on a 2.8 m long cable sample, where both frequency response and time domain reflectometry (TDR) measurements have been performed. After termination of both experiments, actual moisture content has been measured radially and axially. Based on dielectric measurements a model of water ingress has been developed and diffusion coefficients have been estimated for mass impregnated cable paper.
Keywords :
Cable insulation; Dielectric measurements; Dielectrics and electrical insulation; Electricity supply industry; Frequency response; Genetic algorithms; Moisture; Power system relaying; Protective relaying; Reactive power; Karl Fischer titration; Mass impregnated cable; dielectric response; moisture content; oil paper insulation;
Journal_Title :
Power Engineering Review, IEEE
DOI :
10.1109/MPER.2002.4312593
