Greg Stone of IEEE

On-line partial discharge monitoring has become a useful tool over the past 30 years to determine the condition of the electrical insulation in motor and generator stator windings rated 4 kV and above.  With the installation of suitable PD sensors, the monitoring is done during normal operation of the motor or generator.  Although PD testing cannot indicate the exact time of failure, by trending the results over time, PD monitoring can help to determine when stator winding maintenance is prudent, usually with at least 2 years of warning.  The seminar will cover the following topics:
•    Stator winding insulation components
•    Insulation failure mechanisms
•    What is partial discharge
•    Methods to monitor PD on line
•    Basic interpretation.
The seminar will be largely test-vendor agnostic.

Biography:

Dr. Greg Stone.  From 1975 to 1990 he was a Dielectrics Engineer with Ontario Hydro, a large Canadian power generation company.  From 1990 to 2021 he was employed at Iris Power L.P. in Toronto Canada, a motor and generator condition monitoring company he helped to form.  He has published two Wiley/IEEE Press books on motor and generator winding maintenance, a book on partial discharge testing and authored >200 papers concerned with rotating machine windings.  Greg has presented invited lectures at dozens of Universities and Research Institutes on 5 continents.  Since 1980 he has also been active in creating and updating many IEEE and IEC standards concerned with partial discharges and rotating machine insulation testing.  Greg Stone has a PhD in Electrical Engineering from the University of Waterloo, Canada, and is a Fellow of the IEEE and a Fellow of the Engineering Institute of Canada.  He has several awards from IEEE, IEC, CIGRE and the US-based Electric Power Research Institute (EPRI).

Address:Dallas, Texas, United States