Online Partial Discharge Source Localization and Characterization Using Non-Conventional Method

Authors: Ammar Anwar Khan, Nissar R. Wani, Nazar Malik, Abdulrehman Al-Arainy, and Saad Alghuwainem

Abstract:

Power cables are vulnerable to failure due to aging or defects that occur with the passage of time under continuous operation and loading stresses. PD detection and characterization provide information on the location, nature, form and extent of the degradation. As a result, PD monitoring has become an important part of condition based maintenance (CBM) program among power utilities. Online partial discharge (PD) localization of defect sources in power cable system is possible using the time of flight method. The information regarding the time difference between the main and reflected pulses and cable length can help in locating the partial discharge source along the cable length. However, if the length of the cable is not known and the defect source is located at the extreme ends of the cable or in the middle of the cable, then double ended measurement is required to indicate the location of PD source. Use of multiple sensors can also help in discriminating the cable PD or local/ external PD. This paper presents the experience and results from online partial discharge measurements conducted in the laboratory and the challenges in partial discharge source localization.

Keywords: Power cables, partial discharge localization, HFCT, condition based monitoring.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1330495

References:

[1] Ammar Anwar Khan, Nazar Malik, Abdulrehman Al-Arainy, Saad Alghuweinem, "A Review of Condition Monitoring of Underground Power Cables", IEEE International Conference on Condition Monitoring and Diagnosis, Bali, Indonesia, pp, 23-27, September, 2012.
[2] Ammar Anwar Khan, Nazar Malik, Abdulrehman Al-Arainy, Saad Alghuweinem, "Online Partial Discharge Monitoring in Underground Power Cables - Challenges and Oversights", Journal of International Review on Modelling and Simulations (IREMOS). Paper accepted and in publication process.
[3] P.C.J.M. van der Wielen. "On-line Detection and Location of Partial Discharges in Medium Voltage Power Cables", PhD Thesis, Eindhoven University of Technology, Eindhoven The Netherlands, 2005.
[4] Weblink: High Voltage Partial Discharge, www.hvpd.co.uk.