On PD mechanisms at high temperature in voids included in an epoxy resin

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66 Citazioni (Scopus)


In this paper the effects of temperature on partial discharge (PD) activity taking place inside a spherical void in epoxy resin system are studied. Indeed, some experimental tests previously performed on specimens, having different void shapes, under multi-stress condition of temperature and voltage, have shown very different PD amplitude distributions at temperatures higher than ambient. However, this phenomenon cannot be explained only by taking into account the different thermobaric conditions of the enclosed gas. In consequence of the general physical inaccessibility of such voids, a study is here performed using a numerical model based on an evolutionary optimization algorithm. This is used to evaluate the range values for the physical parameters of the insulating system influencing the observed changes in PD activity. Finally, comments are presented about the adopted criteria by which the comparison between the experimental data and the simulated ones is performed, and about the interpretation of the dependence on temperature of the experimental PD.
Lingua originaleEnglish
pagine (da-a)589-597
Numero di pagine9
RivistaIEEE Transactions on Dielectrics and Electrical Insulation
Stato di pubblicazionePublished - 2001

All Science Journal Classification (ASJC) codes

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