F. Gutfleisch et L. Niemeyer, MEASUREMENT AND SIMULATION OF PD IN EPOXY VOIDS, IEEE transactions on dielectrics and electrical insulation, 2(5), 1995, pp. 729-743
Experimental data are presented of the development of PD activity in a
rtificial air-filled spherical voids in epoxy resin over a period of s
imilar to 6 months. The data are presented in the form of phase averag
ed plots of the charge distribution over the time (aging plots) and ph
ase resolved histograms (PRPD patterns) at various aging states. They
are interpreted by comparison to numerical simulations which are based
on a physical discharge model. This provides insight into the physica
l changes in the void during aging. The simulation is the basis for a
physically meaningful interpretation of the PD data. It provides rules
for the identification of the defect type, the defect quantification,
and an assessment of the aging stage.