Title :
Diagnosis of moisture in oil/paper distribution Cables - Part II: Water penetration in cable insulation - experiment and modeling
Author :
Neimanis, Roberts ; Eriksson, Roland ; Papazyan, Ruslan
Author_Institution :
Programma Electr. AB, Taby, Sweden
Abstract :
For Pt.I see ibid., vol.19, no.1, p.9-14, January 2004. Dynamics of water penetration in mass impregnated cable insulation has been studied. For experimental purposes, artificial damage has been inflicted to a 40-cm-long cable sample and water ingress has been continuously monitored by frequency response measurements. A similar experiment has been conducted on 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 :
dielectric measurement; diffusion; distribution networks; frequency response; impregnated insulation; moisture measurement; oil filled cables; paper; power cable insulation; time-domain reflectometry; 10 kV; Karl Fischer titration; dielectric measurement; dielectric spectroscopy; diffusion coefficient; distribution cable; frequency response measurement; mass impregnated cable insulation; moisture content; moisture diagnosis; oil-paper cable insulation; time-domain reflectometry measurement; water ingress; water penetration; Cable insulation; Dielectric measurements; Frequency measurement; Frequency response; Moisture; Monitoring; Oil insulation; Petroleum; Reflectometry; Time domain analysis;
Journal_Title :
Power Delivery, IEEE Transactions on
DOI :
10.1109/TPWRD.2003.820430
