A new dielectric response model for water tree degraded XLPE insulation - Part A: Model development with small sample verification

Thomas, A. J. and Saha, T. K. (2008) A new dielectric response model for water tree degraded XLPE insulation - Part A: Model development with small sample verification. IEEE Transactions On Dielectrics And Electrical Insulation, 15 4: 1131-1143. doi:10.1109/TDEI.2008.4591236


Author Thomas, A. J.
Saha, T. K.
Title A new dielectric response model for water tree degraded XLPE insulation - Part A: Model development with small sample verification
Journal name IEEE Transactions On Dielectrics And Electrical Insulation   Check publisher's open access policy
ISSN 1070-9878
Publication date 2008-08-01
Year available 2008
Sub-type Article (original research)
DOI 10.1109/TDEI.2008.4591236
Open Access Status
Volume 15
Issue 4
Start page 1131
End page 1143
Total pages 13
Editor R. Hackam
Place of publication Piscataway, NJ
Publisher IEEE
Language eng
Subject C1
0906 Electrical and Electronic Engineering
850603 Energy Systems Analysis
Abstract Water tree degradation in underground XLPE insulated cables is a growing, worldwide problem. This form of degradation is ultimately fatal for affected cables, and therefore the detection of damaging trees in power cable insulation is vital for distribution companies to avoid catastrophic failure. Dielectric response measurements, in both the time and frequency domains, can generate valuable information about the condition of the cable. However, the interpretation of how these dielectric response measurements relate to water tree density and length is a difficult task. This paper will present a new dielectric response model for water tree degraded XLPE insulation. The model is based on finite element analysis to determine the electrical behaviour of water tree degraded insulation. Preliminary simulations will verify the model development by comparing the results to small sample Pulsed Electro-Acoustic (PEA) measurements performed by other researchers. The importance of a strong non-linearity mechanism for accurate modelling will also be elucidated.
Keyword Engineering, Electrical & Electronic
water trees
cross linked polyethylene insulation
finite element method
dielectric measurements
space charge
conductivity
dielectric loss
nonlinearities
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Sun, 05 Apr 2009, 19:01:03 EST by Donna Clark on behalf of School of Information Technol and Elec Engineering