Conference on partial discharges by G. Stone (Iris Power, Ca)

Event information

Start date :04/04/2017

End date :04/04/2017

Time :10:00

Location : Amphi Concorde, bât. U4, campus UT3 Paul Sabatier, 118 route de Narbonne, 31062, Toulouse

GregStoneby Dr Greg Stone, Iris power LP / Qualitrol (Canada)

Member of Cédric Abadie PhD Thesis Defense Committee.

This conference is organised by Laplace laboratory.




Partial Discharge (PD) monitoring has become an important tool for insulation condition assessment in rotating machine stator windings rated 6 kV and above.  However there are still issues with the creditably of the results of such monitoring, especially amongst owners of machines, who have to make expensive decisions based on these results.  The main cause of poor credibility has been the high risk of false positive and false negative alarms. To some extent this has been addressed in the move to VHF an UHF detection methods.  Also hardware and software tools continue to be developed to reduce the risk of false indications.  This presentation will review recent progress in on-line PD monitoring and present areas were improvements still need to be made.


Dr. Greg Stone was one of the developers of on-line partial discharge test methods to evaluate the condition of the high voltage insulation in stator windings.  From 1975 to 1990 he was a Dielectrics Engineer with Ontario Hydro, a large Canadian power generation company.  Since 1990, Dr. Stone has been employed at Iris Power L.P. in Toronto Canada, a motor and generator condition monitoring company he helped to form.  He has published two books and >200 papers concerned with rotating machine windings.  He has awards from the IEEE, Cigre and IEC for his technical contributions to rotating machine assessment.  Greg Stone has a PhD in Electrical Engineering from the University of Waterloo (Canada), is a Fellow of the IEEE.