This paper proposes a new model which provides the life estimation of polymeric insulation subjected to dc stress, with or without voltage reversals, on the basis of accelerated life tests carried out at constant dc stress and measurements of space charges. Accordingly, the performance of a new material under dc electrical stress can be characterised by short-term tests, so that, for example, the expected life of a cable can be evaluated once the rate of voltage reversals expected during its life has been guessed. The model is applied to results of tests carried out on polyethylene materials.

A general model for life estimation of cables under DC stress with voltage-polarity inversions accounting for space-charge effects

Cavallini A.;Fabiani D.;Mazzanti G.;Montanari G. C.
2001

Abstract

This paper proposes a new model which provides the life estimation of polymeric insulation subjected to dc stress, with or without voltage reversals, on the basis of accelerated life tests carried out at constant dc stress and measurements of space charges. Accordingly, the performance of a new material under dc electrical stress can be characterised by short-term tests, so that, for example, the expected life of a cable can be evaluated once the rate of voltage reversals expected during its life has been guessed. The model is applied to results of tests carried out on polyethylene materials.
Proceedings of 2001 International Symposium on Electrical Insulating Materials (ISEIM 2001). 2001 Asian Conference on Electrical Insulating Diagnosis (ACEID 2001). 33rd Symposium on Electrical and Electrical and Electronic Insulating Materials and Applications in Systems (IEEE Cat. No.01TH8544)
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452
Cavallini A.; Fabiani D.; Mazzanti G.; Montanari G.C.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/886363
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