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Continuous online monitoring of partial discharges in high voltage cables

Y.Tian, P.L.Lewin, J.S.Wilkinson*, S.J.Sutton** and S.G.Swingler

High Voltage Laboratory, University of Southampton, Hampshire, UK
* Optoelectronics Research Centre, University of Southampton, UK
** National Grid Transco plc, Warwickshire, UK

Abstract

This paper reviews data acquisition, transmission and processing methodologies for continuous online monitoring of partial discharges in power cable systems. A PD continuous online monitoring system for underground cable circuits using capacitive couplers, LiNbO3 electro-optic modulators, laser, optical switch and optical fibers has been proposed. Data processing methods include pulse shape and spectrum analysis, time of flight analysis, phase-resolved two-dimensional histograms, three-dimensional φ-q-n patterns, trend analysis, wavelet-based denoising, alarm strategy and telecommunication function to enable remote control and data download.


ISEI 2004 Indianapolis 19-22 Sep (2004) pp.454-457

doi: 10.1109/ELINSL.2004.1380640

Southampton ePrint id: 38246

 

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Copyright University of Southampton 2006