This paper analyzes the behaviour of dielectric interfaces on space charge trapping features of electrical insulation systems. In particular, results of space charge measurements performed at different temperatures on chemical and physical interfaces of dual-dielectric minicables are here presented and discussed. Interfacial polarization due to conductivity/permittivity mismatch between different insulations is investigated together with the charge accumulation at the interface due to injection from the electrodes. The presence of interfaces, particularly physical interfaces, seems to give rise to a significant space charge build-up, which, in turn, is able to distort the actual electric field, overstressing the insulation with respect to the design field.

The effect of temperature on space charge accumulated at chemical and physical interfaces of HVDC polymeric insulation systems

DELPINO, SAVERIO;FABIANI, DAVIDE;MONTANARI, GIAN CARLO;
2007

Abstract

This paper analyzes the behaviour of dielectric interfaces on space charge trapping features of electrical insulation systems. In particular, results of space charge measurements performed at different temperatures on chemical and physical interfaces of dual-dielectric minicables are here presented and discussed. Interfacial polarization due to conductivity/permittivity mismatch between different insulations is investigated together with the charge accumulation at the interface due to injection from the electrodes. The presence of interfaces, particularly physical interfaces, seems to give rise to a significant space charge build-up, which, in turn, is able to distort the actual electric field, overstressing the insulation with respect to the design field.
Proceedings of the 9th International Conference on Solid Dielectrics (ICDS)
498
501
S. Delpino; D. Fabiani; G.C. Montanari; P. Morshuis; R. Bodega
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/56490
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