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

Volume

22

Issue

9

fYear

2002

Firstpage

59

Lastpage

60

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;

fLanguage

English

Journal_Title

Power Engineering Review, IEEE

Publisher

ieee

ISSN

0272-1724

Type

jour

DOI

10.1109/MPER.2002.4312593

Filename

4312593