Abstract
A time-dependent, hydrodynamic, model of partial discharges in voids in dielectrics is
presented. The partial discharge is regarded as a space charge dominated electron avalanche. The model incorporates the relevant collisional and radiative processes in the void and at its
boundary, and the field distortion due to the presence of space charge and void surface charges.
Also the coupling with the external circuit is taken into account. Model simulations show that,
as a result of field quenching, the associated charge versus applied field shows saturation above
a certain threshold. The threshold field depends on geometry and initial electron number, but
is higher than the inception values usually quoted. The saturation charge may deviate by a factor
of 2-10 from values obtained with simplified models.
| Original language | English |
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| Title of host publication | Gaseous dielectrics VII : proceedings of the seventh international symposium on gaseous dielectrics, Knoxville, Tennessee, USA, April 24-28, 1994 |
| Editors | L.G. Christophorou, D.R. James |
| Place of Publication | New York, NY |
| Publisher | Plenum Press |
| Pages | 231-238 |
| ISBN (Print) | 0-306-44984-6 |
| Publication status | Published - 1994 |
| Event | conference; Gaseous Dielectrics VII, Proc. 7th International Symposium on Gaseous Dielectrics, Knoxville, TN, 1 April 1994 - Duration: 1 Jan 1994 → … |
Conference
| Conference | conference; Gaseous Dielectrics VII, Proc. 7th International Symposium on Gaseous Dielectrics, Knoxville, TN, 1 April 1994 |
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| Period | 1/01/94 → … |
| Other | Gaseous Dielectrics VII, Proc. 7th International Symposium on Gaseous Dielectrics, Knoxville, TN, 1 April 1994 |