Study of partial discharge activity by excess current

Measurements of partial discharges (PD) play an important role in study of dielectric materials. This work applies a measurement system based on dielectric response technique to study an excess current associated with PD activity, which appears during and after PD activity and shows some prominent properties. The value of such a measurement is demonstrated through studies of two types of test objects, twisted pairs and cavity specimens. A simultaneous use of pulse PD detection in the study shows a correlation between changes in PD amplitudes and non-PD excess current levels. It is concluded that the used methodology can serve as an important complement to the traditionally used pulse PD detection.

[1]  T. Bengtsson,et al.  Dielectric response measurements utilizing semi-square voltage waveforms , 2008, IEEE Transactions on Dielectrics and Electrical Insulation.

[2]  Xiangdong Xu,et al.  Enhancements in Dielectric Response Characterization of Insulation Materials , 2013 .

[3]  P. Werelius,et al.  High voltage dielectric response analyser for cable diagnostics , 1993, Proceedings of IEEE Conference on Electrical Insulation and Dielectric Phenomena - (CEIDP '93).

[4]  Tord Bengtsson,et al.  Resonant PD signal decoupling circuit for rapidly changing voltages , 2011 .

[5]  F. H. Kreuger,et al.  Partial Discharge Detection in High Voltage Equipment , 1990 .

[6]  Le Wang,et al.  Physical model of PD behavior and relevant damage growth from micro-cavities in polyethylene-based material under AC voltage , 2011 .

[8]  Tord Bengtsson,et al.  Loss current studies of partial discharge activity , 2015, IEEE Transactions on Dielectrics and Electrical Insulation.

[9]  S. M. Gubanski,et al.  Partial discharges in motor wires at PWM voltages of different smoothness , 2014, Proceedings of 2014 International Symposium on Electrical Insulating Materials.

[10]  Thomas Hammarström.  Partial Discharges at Fast Rising Voltages , 2014 .

[11]  H. Edin,et al.  Time domain PD-detection vs. dielectric spectroscopy , 1997, IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena.

[12]  Gian Carlo Montanari.  Aging and life models for insulation systems based on PD detection , 1995 .

[13]  C. Mayoux,et al.  Experimental and theoretical study of a glow discharge at atmospheric pressure controlled by dielectric barrier , 1998 .

[14]  N. Taylor.  Dielectric response and partial discharge measurements on stator insulation at varied low frequency , 2010 .

[15]  J. Kuffel,et al.  High Voltage Engineering: Fundamentals , 1984 .

[16]  G. Stone,et al.  In-service evaluation of motor and generator stator windings using partial discharge tests , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[17]  M. Esashi,et al.  Micro-discharge and electric breakdown in a micro-gap , 2000 .

[18]  P.H.F. Morshuis,et al.  Degradation of solid dielectrics due to internal partial discharge: some thoughts on progress made and where to go now , 2005, IEEE Transactions on Dielectrics and Electrical Insulation.

[19]  Elisabeth Lindell,et al.  Stochastic detection of partial discharges , 2013, IEEE Transactions on Dielectrics and Electrical Insulation.