Title :
Phase-resolved study on partial discharge for degradation diagnosis in polymeric insulating materials using model electrode system
Author :
Komori, Fumitaka ; Kojima, Akira ; Hikita, Masayuki ; Suzuoki, Yasuo ; Mizutani, Teruyoshi
Author_Institution :
Toba Nat. Coll., Japan
Abstract :
Using MGI (metal-gap-insulator) and IGI (insulator-gap-insulator) electrode systems with 0.1 mm- or 4.0 mm-thick LDPE samples, we studied the temporal change of PD characteristics. The PD pattern and statistical parameter (PD inception phase) changed with aging time. The IGI electrode system showed a similar change in PD pattern with degradation to that of the MGI electrode system. The PDs in MGI electrodes with the 4.0 mm-thick sample showed new PD characteristics which were absent in the 0.1 mm-thick sample. This was attributed to pit formation just before breakdown. There results suggest the possibility of insulation diagnosis from the beginning to the last stage of PD degradation
Keywords :
ageing; electric breakdown; electrodes; insulation testing; partial discharge measurement; polyethylene insulation; pulse measurement; 0.1 mm; 4 mm; LDPE insulation; PD inception phase; PD pattern; PD statistical parameter; aging time; breakdown; degradation diagnosis; insulator-gap-insulator electrode system; metal-gap-insulator electrode system; model electrode system; phase-resolved PD study; pit formation; polymeric insulating materials; temporal change; Aging; Breakdown voltage; Electric breakdown; Electrodes; Partial discharge measurement; Partial discharges; Plastic insulation; Polymers; Pulse measurements; Thermal degradation;
Conference_Titel :
Conduction and Breakdown in Solid Dielectrics, 1998. ICSD '98. Proceedings of the 1998 IEEE 6th International Conference on
Conference_Location :
Vasteras
Print_ISBN :
0-7803-4237-2
DOI :
10.1109/ICSD.1998.709248
