Given, M.J. and Fouracre, R.A. and MacGregor, S.J. and Banford, H. and Judd, M.D. (2001) Diagnostic dielectric spectroscopy methods applied to water-treedcable. IEEE Transactions on Dielectrics and Electrical Insulation, 8 (6). pp. 917-920. ISSN 1070-9878Full text not available in this repository. (Request a copy from the Strathclyde author)
Considerable effort has gone into developing polymer formulations and cable designs to minimize failures through water tree growth. However, diagnostic techniques still are required to enable the estimation of the level of damage present within a service cable. This paper reports on progress regarding the application of dielectric spectroscopy to cable diagnostics. A 40 kV, crosslinked polyethylene (XLPE) insulated coaxial cable was used as a model power cable. Sample lengths were immersed in a potassium chloride solution and some of these were subjected to AC electrical stress. After an 8 week duration, a high density of tress was found in the electrically stressed cable. Dielectric spectra have been measured for both sample types in the frequency range of 10-5 to 105 Hz. Insertion loss measurements were also carried out in the frequency range of 3×10 5 to 3×109 Hz. From both types of measurement, it was possible to distinguish between the cables containing water trees and those that were free from water tree structures. These approaches could therefore be developed in order to provide diagnostics for the detection of water tree damage in electrical power cables.
|Keywords:||XLPE insulation, dielectric measurement, insulation testing, power cable insulation, spectroscopy, Electrical engineering. Electronics Nuclear engineering, Electrical and Electronic Engineering|
|Subjects:||Technology > Electrical engineering. Electronics Nuclear engineering|
|Department:||Faculty of Engineering > Electronic and Electrical Engineering|
|Depositing user:||Strathprints Administrator|
|Date Deposited:||21 Jun 2007|
|Last modified:||06 Jan 2017 03:06|