Title :
Measurements of slot partial discharges with an antenna during accelerated aging
Author :
Lévesque, M. ; Hudon, C. ; Bélec, M. ; David, E.
Author_Institution :
Ecole de Technol. Super. de Montreal, Montreal, QC, Canada
fDate :
May 31 2009-June 3 2009
Abstract :
A long-term aging experiment is currently under way on six stator bars subjected to slot partial discharges (PD) activity under electrical, thermal and mechanical stresses. Slot PD were induced on each bar by abrading a portion of their semi-conductive coating. All bars were subjected to accelerated aging at twice their nominal voltage. Two bars were only electrically stressed, two others were electrically and thermally stressed and the last two were electrically, thermally and mechanically stressed. It was noted that the evolution of slot PD was different for each kind of stress. In order to understand those differences, periodic measurements as a function of the aging time were conducted using a directional antenna to detect the electromagnetic radiated signal from each specific slot PD site. The results show the evolution of slot PD activity for the different stress conditions.
Keywords :
ageing; antenna radiation patterns; bars; directive antennas; machine insulation; partial discharge measurement; slot antennas; stators; stress analysis; thermal stresses; accelerated aging; directional antenna; electrical stress; electromagnetic radiated signal; long-term aging experiment; mechanical stress; periodic measurement; semiconductive coating; slot partial discharge measurement; stator bar; thermal stress; Accelerated aging; Antenna measurements; Coatings; Electromagnetic measurements; Partial discharges; Slot antennas; Stator bars; Thermal stresses; Time measurement; Voltage;
Conference_Titel :
Electrical Insulation Conference, 2009. EIC 2009. IEEE
Conference_Location :
Montreal, QC
Print_ISBN :
978-1-4244-3915-7
Electronic_ISBN :
978-1-4244-3917-1
DOI :
10.1109/EIC.2009.5166390
