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Phase-resolved study on partial discharge for degradation diagnosis in polymeric insulating materials using model electrode system

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5 Author(s)

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

Published in:

Conduction and Breakdown in Solid Dielectrics, 1998. ICSD '98. Proceedings of the 1998 IEEE 6th International Conference on

Date of Conference:

22-25 Jun 1998