Identifcation and Location of Partial Discharge Defects in Medium Voltage AC Cables
The presence of partial discharge (PD) in electrical
equipment is the confirmation or indication of an ongoing
degradation of its dielectric insulation. PD study is a widely used
tool for condition monitoring of medium voltage (MV) cables.
The location of the defects can be considered as one of the most
important tasks of diagnosis in underground installations of MV
cables. A lot of references can be found on the location of single
PD sources along the cable. However, several PD defects can be
active simultaneously along a cable section. This paper presents
an experimental study on a MV cable having two PD sources
and noise. Adopting one end measurement technique, a high
frequency current transformer (HFCT) is used to capture the PD
current pulses. A simple approach of identification of the PD
signals originated from different PD sources is presented based
on wave-shape study along with a time domain reflectometry
analysis. The presented measurement methodology and time
domain analysis technique provides a convenient way for
detection and location of more than one PD sources along a cable
Proceedings of the Nordic Insulation Symposium licenses all content of the journal under a Creative Commons Attribution (CC-BY) licence. This means, among other things, that anyone is free to copy and distribute the content, as long as they give proper credit to the author(s) and the journal. For further information, see Creative Commons website for human readable or lawyer readable versions.
Authors who publish with this journal agree to the following terms:
1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).