Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat 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 (Engelska)Ingår i: IEEE transactions on dielectrics and electrical insulation, ISSN 1070-9878, E-ISSN 1558-4135, Vol. 13, nr 4, s. 712-716Artikel i tidskrift (Refereegranskat) 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.

Ort, förlag, år, upplaga, sidor
2006. Vol. 13, nr 4, s. 712-716
Nyckelord [en]
complex permittivity, scattering parameters, insulation, semi-conducting, two-port, one-port, high frequency, measurements, characterization
Nationell ämneskategori
Annan elektroteknik och elektronik
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
Anmärkning
QC 20100525Tillgänglig från: 2010-08-05 Skapad: 2010-08-05 Senast uppdaterad: 2017-12-12Bibliografiskt granskad
Ingår i avhandling
1. High frequency characteristics of medium voltage XLPE power cables
Öppna denna publikation i ny flik eller fönster >>High frequency characteristics of medium voltage XLPE power cables
2005 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
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.

Ort, förlag, år, upplaga, sidor
Stockholm: KTH, 2005. s. 93
Serie
Trita-ETS, ISSN 1650-674X ; 2005:17
Nationell ämneskategori
Annan elektroteknik och elektronik
Identifikatorer
urn:nbn:se:kth:diva-560 (URN)91-7178-215-X (ISBN)
Disputation
2005-12-20, Sal D2, Lindstedtsvägen 5, Stockholm, 10:15
Opponent
Handledare
Anmärkning
QC 20101018Tillgänglig från: 2005-12-14 Skapad: 2005-12-14 Senast uppdaterad: 2010-10-18Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltextScopus

Sök vidare i DiVA

Av författaren/redaktören
Mugala, GavitaEriksson, Roland
Av organisationen
Skolan för elektro- och systemteknik (EES)Elektroteknisk teori och konstruktion
I samma tidskrift
IEEE transactions on dielectrics and electrical insulation
Annan elektroteknik och elektronik

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 75 träffar
RefereraExporteraLänk till posten
Permanent länk

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