A master thesis from Aalborg University
Condition monitoring of crossbonded transmission cable systems
Author(s)
Term
4. term
Education
Publication year
2012
Submitted on
2012-05-31
Pages
281 pages
Abstract
This report study the possibility of monitoring the condition of the link boxes in a cross bonded cable line. The study is focused on how the condition can be determined from an impedance measurement, in order to make the method available, line impedance measuring equipment is used. The measuring technique is improved to gain high sensitivity in respect to screen circuit faults. This is achieved, using ungrounded voltages sources and increased measuring frequency. A DIgSILENT simulation model of the cable line FRT-NOR is developed and verified against field measurements. The simulation model is used for simulation of four study cases, which represent possible link box faults. From the study cases the largest detectable fault resistances are determined to 39-68 Ohm according to the type of fault. Finally there are given suggestions of how the impedance method could be used at cable lines consisting of more than one major section. It is recommended to make strategic chosen link boxes easy accessible, when construction new cable lines.
Documents
Colophon: This page is part of the AAU Student Projects portal, which is run by Aalborg University. Here, you can find and download publicly available bachelor's theses and master's projects from across the university dating from 2008 onwards. Student projects from before 2008 are available in printed form at Aalborg University Library.
If you have any questions about AAU Student Projects or the research registration, dissemination and analysis at Aalborg University, please feel free to contact the VBN team. You can also find more information in the AAU Student Projects FAQs.