A new method to estimate the average dielectric constants of aged power cables

Md Nazmul Alam, David Coats, Yong June Shin, Roger A. Dougal, Mohammod Ali

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A new method to estimate the average dielectric constants of cable sections that have undergone aging is proposed. By comparing the experimental Joint Time-Frequency Domain Reflectometry waveform signatures from a new and an aged cable of the same type, it is demonstrated that the change in the average dielectric constant of the insulation material due to aging can be estimated. For example, for a cable containing Cross-Linked Polyethylene insulation, accelerated aging tests based on the modified Arrhenius equation that simulate 120 years of aging at 50 °C operating temperature show that the dielectric constant of the insulation decreases by more than 34.5%. The same tests performed on another cable containing Ethylene-Propylene Rubber insulation show that the average dielectric constant of the insulation decreases by 10.4%. The efficacy of the method is further demonstrated by estimating the increase in the average dielectric constant of a wedge section of a cable that contained water intrusion.

Original languageEnglish
Pages (from-to)777-789
Number of pages13
JournalJournal of Electromagnetic Waves and Applications
Volume28
Issue number7
DOIs
Publication statusPublished - 2014 May 3

Fingerprint

insulation
cables
Insulation
Cables
Permittivity
permittivity
Aging of materials
estimates
Rubber
Polyethylene
propylene
operating temperature
rubber
intrusion
wedges
Propylene
Polyethylenes
polyethylenes
Ethylene
waveforms

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Physics and Astronomy(all)
  • Electrical and Electronic Engineering

Cite this

Alam, Md Nazmul ; Coats, David ; Shin, Yong June ; Dougal, Roger A. ; Ali, Mohammod. / A new method to estimate the average dielectric constants of aged power cables. In: Journal of Electromagnetic Waves and Applications. 2014 ; Vol. 28, No. 7. pp. 777-789.
@article{1566a5762eb04a58a217eb6f1d21dcfc,
title = "A new method to estimate the average dielectric constants of aged power cables",
abstract = "A new method to estimate the average dielectric constants of cable sections that have undergone aging is proposed. By comparing the experimental Joint Time-Frequency Domain Reflectometry waveform signatures from a new and an aged cable of the same type, it is demonstrated that the change in the average dielectric constant of the insulation material due to aging can be estimated. For example, for a cable containing Cross-Linked Polyethylene insulation, accelerated aging tests based on the modified Arrhenius equation that simulate 120 years of aging at 50 °C operating temperature show that the dielectric constant of the insulation decreases by more than 34.5{\%}. The same tests performed on another cable containing Ethylene-Propylene Rubber insulation show that the average dielectric constant of the insulation decreases by 10.4{\%}. The efficacy of the method is further demonstrated by estimating the increase in the average dielectric constant of a wedge section of a cable that contained water intrusion.",
author = "Alam, {Md Nazmul} and David Coats and Shin, {Yong June} and Dougal, {Roger A.} and Mohammod Ali",
year = "2014",
month = "5",
day = "3",
doi = "10.1080/09205071.2014.890551",
language = "English",
volume = "28",
pages = "777--789",
journal = "Journal of Electromagnetic Waves and Applications",
issn = "0920-5071",
publisher = "Taylor and Francis Ltd.",
number = "7",

}

A new method to estimate the average dielectric constants of aged power cables. / Alam, Md Nazmul; Coats, David; Shin, Yong June; Dougal, Roger A.; Ali, Mohammod.

In: Journal of Electromagnetic Waves and Applications, Vol. 28, No. 7, 03.05.2014, p. 777-789.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A new method to estimate the average dielectric constants of aged power cables

AU - Alam, Md Nazmul

AU - Coats, David

AU - Shin, Yong June

AU - Dougal, Roger A.

AU - Ali, Mohammod

PY - 2014/5/3

Y1 - 2014/5/3

N2 - A new method to estimate the average dielectric constants of cable sections that have undergone aging is proposed. By comparing the experimental Joint Time-Frequency Domain Reflectometry waveform signatures from a new and an aged cable of the same type, it is demonstrated that the change in the average dielectric constant of the insulation material due to aging can be estimated. For example, for a cable containing Cross-Linked Polyethylene insulation, accelerated aging tests based on the modified Arrhenius equation that simulate 120 years of aging at 50 °C operating temperature show that the dielectric constant of the insulation decreases by more than 34.5%. The same tests performed on another cable containing Ethylene-Propylene Rubber insulation show that the average dielectric constant of the insulation decreases by 10.4%. The efficacy of the method is further demonstrated by estimating the increase in the average dielectric constant of a wedge section of a cable that contained water intrusion.

AB - A new method to estimate the average dielectric constants of cable sections that have undergone aging is proposed. By comparing the experimental Joint Time-Frequency Domain Reflectometry waveform signatures from a new and an aged cable of the same type, it is demonstrated that the change in the average dielectric constant of the insulation material due to aging can be estimated. For example, for a cable containing Cross-Linked Polyethylene insulation, accelerated aging tests based on the modified Arrhenius equation that simulate 120 years of aging at 50 °C operating temperature show that the dielectric constant of the insulation decreases by more than 34.5%. The same tests performed on another cable containing Ethylene-Propylene Rubber insulation show that the average dielectric constant of the insulation decreases by 10.4%. The efficacy of the method is further demonstrated by estimating the increase in the average dielectric constant of a wedge section of a cable that contained water intrusion.

UR - http://www.scopus.com/inward/record.url?scp=84896317019&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84896317019&partnerID=8YFLogxK

U2 - 10.1080/09205071.2014.890551

DO - 10.1080/09205071.2014.890551

M3 - Article

AN - SCOPUS:84896317019

VL - 28

SP - 777

EP - 789

JO - Journal of Electromagnetic Waves and Applications

JF - Journal of Electromagnetic Waves and Applications

SN - 0920-5071

IS - 7

ER -