Single-sided partial discharge location method based on impedance discontinuities along power cable

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Abstract

Time domain reflectometry (TDR) applied to live cables is hampered by the absence of a clear reflection from the far end. Instead, location of partial discharge (PD) can be extracted from small structures in recorded patterns arising from any impedance variation along the signal propagation channel. This paper explores two approaches for a single-sided PD location system. The first method compares similar signal sequences occurring in PD pattern and pattern obtained from an injected signal. The second method exploits the change of impedance at a far end Ring Main Unit (RMU) by introducing ferrite material, whose effect can be switched on and off. Experiment on medium voltage (MV) cable with about 560 m length shows that both methods can locate the PD within 2% uncertainty.
Original languageEnglish
Title of host publicationProceedings of the 18th Power Systems Computation Conference(PSCC2014), 18-22 August 2014, Wroclaw, Poland
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Pages1-6
DOIs
Publication statusPublished - 2014
Event18th Power Systems Computation Conference (PSCC 2014), August 18-22, 2014, Wroclaw, Poland - Wroclaw, Poland
Duration: 18 Aug 201422 Aug 2014
http://www.pscc2014.net/index.php?p=start

Conference

Conference18th Power Systems Computation Conference (PSCC 2014), August 18-22, 2014, Wroclaw, Poland
Abbreviated titlePSCC 2014
CountryPoland
CityWroclaw
Period18/08/1422/08/14
Internet address

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