Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Comparing two measurement techniques for high frequency characterization of power cable semi-conducting and insulating materials
KTH, Skolan för elektro- och systemteknik (EES).
KTH, Skolan för elektro- och systemteknik (EES), Elektroteknisk teori och konstruktion.
Vattenfall.
2006 (engelsk)Inngår i: IEEE transactions on dielectrics and electrical insulation, ISSN 1070-9878, E-ISSN 1558-4135, Vol. 13, nr 4, s. 712-716Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Understanding the high frequency characteristics of the materials that make up medium voltage extruded cables is important in establishing diagnostics schemes based on electromagnetic pulse propagation methods. Two measurement techniques have been developed and used to characterize the high frequency material properties of semi-conducting screens and cross linked polyethylene (XLPE) insulation up to 100 MHz. The experimental details, parameter extraction and limitations of the two measurement techniques are presented.

sted, utgiver, år, opplag, sider
2006. Vol. 13, nr 4, s. 712-716
Emneord [en]
complex permittivity, scattering parameters, insulation, semi-conducting, two-port, one-port, high frequency, measurements, characterization
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-15913DOI: 10.1109/TDEI.2006.1667728ISI: 000239705700004Scopus ID: 2-s2.0-33748323309OAI: oai:DiVA.org:kth-15913DiVA, id: diva2:333955
Merknad
QC 20100525Tilgjengelig fra: 2010-08-05 Laget: 2010-08-05 Sist oppdatert: 2017-12-12bibliografisk kontrollert
Inngår i avhandling
1. High frequency characteristics of medium voltage XLPE power cables
Åpne denne publikasjonen i ny fane eller vindu >>High frequency characteristics of medium voltage XLPE power cables
2005 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

The response of a cable can be used to analyze the variation of the material characteristics along its length. For diagnosis of possible ageing, it is necessary to know how cable design, material properties and cable insulation ageing affects the wave propagation. A cable model has therefore been worked out based upon the high frequency properties of the cable insulation and conductor systems. The high frequency characteristics of the semi-conducting screens, new and water-tree aged cross-linked polyethylene (XLPE) insulation have been determined by two measuring techniques. Semi-conducting screens have a great influence on the attenuation of cables at high frequencies.

A dielectric function based on an empirical formula is fitted to the measured characteristics of the semi-conducting screens. The dielectric function is used in the cable model set-up to predict the propagation constant of the cables.

The high frequency characteristics of the water-tree degraded XLPE insulation obtained from measurements are related to the water content of the water trees of the samples. An effective materials model is developed to estimate the water content of the water trees and the conductivity of the water.

The propagation constant from the cable model is compared to the propagation constant obtained from measurements made on cables. Using approximate high frequency cable models, the relative contributions of the conductor and insulation systems to the attenuation and phase velocity of the cables are analyzed.

sted, utgiver, år, opplag, sider
Stockholm: KTH, 2005. s. 93
Serie
Trita-ETS, ISSN 1650-674X ; 2005:17
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-560 (URN)91-7178-215-X (ISBN)
Disputas
2005-12-20, Sal D2, Lindstedtsvägen 5, Stockholm, 10:15
Opponent
Veileder
Merknad
QC 20101018Tilgjengelig fra: 2005-12-14 Laget: 2005-12-14 Sist oppdatert: 2010-10-18bibliografisk kontrollert

Open Access i DiVA

Fulltekst mangler i DiVA

Andre lenker

Forlagets fulltekstScopus

Søk i DiVA

Av forfatter/redaktør
Mugala, GavitaEriksson, Roland
Av organisasjonen
I samme tidsskrift
IEEE transactions on dielectrics and electrical insulation

Søk utenfor DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric

doi
urn-nbn
Totalt: 75 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf