NDLI: Partial discharge diagnostics of defective medium voltage three-phase PILC cables

Content Provider	IEEE Xplore Digital Library
Author	Hunter, J.A. Hao, L. Lewin, P.L. Walton, C. Michel, M.
Copyright Year	2012
Description	Author affiliation: EEE Group, The Faculty of Physical and Applied Sciences, The University of Southampton, UK (Hunter, J.A.; Hao, L.; Lewin, P.L.) \|\| Future Networks, United Kingdom Power Networks, Crawley, UK (Michel, M.) \|\| PPA Energy, Guildford, UK (Walton, C.)
Abstract	There are a number of medium voltage (MV) power distribution cable networks worldwide that are constructed predominantly of mass impregnated paper cables - London being one of these. Paper insulated lead covered (PILC) cables were extensively laid in the 50s and 60s before the introduction of cheaper polymeric alternatives that were sufficiently reliable. The current operational state of these networks has shown a gradual increase in failure rates of the previously reliable paper cables that are drawing to the end of their expected design life. Utilities are faced with the prospect of the impending failure of large sections of their prized asset and are keen to develop tools to better understand the health of their hardware. The analysis of partial discharge (PD) signals produced by the cables has been identified as a economically viable option to provide continuous condition monitoring of PILC cable circuits. Clearly, a comprehensive understanding of how PD activity relates to the various failure mechanisms exhibited by cable circuits in the field is required. In order to generate representative and repeatable PD signals from a number of PILC cable samples under rated conditions, an experiment was designed and commissioned. The scope of this paper is to introduce two cable degradation mechanisms that were applied to test cable and show the associated PD activity that was produced. A recently published technique for PD source discrimination was coupled with an understanding of the system and applied to the experiment data to isolate the signals specific to each degradation mechanism.
Starting Page	371
Ending Page	375
File Size	940592
Page Count	5
File Format	PDF
ISBN	9781467304887
ISSN	1089084X
e-ISBN	9781467304870
e-ISBN	9781467304863
DOI	10.1109/ELINSL.2012.6251492
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-10
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Partial discharges Power cables Degradation Power cable insulation Monitoring Noise Paper insulated lead covered distribution cable Partial discharge Condition monitoring Medium voltage plant
Content Type	Text
Resource Type	Article

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