Title :
A general model for life estimation of cables under DC stress with voltage-polarity inversions accounting for space-charge effects
Author :
Cavallini, A. ; Fabiani, D. ; Mazzanti, G. ; Montanari, G.C.
Author_Institution :
DIE-LMIAT, Bologna Univ., Italy
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
Keywords :
insulation testing; life testing; polyethylene insulation; power cable insulation; power cable testing; space charge; DC electrical stress; accelerated life testing; polyethylene; polymeric cable insulation; space charge; voltage reversal; voltage-polarity inversion; Cables; Current measurement; Insulation testing; Life estimation; Life testing; Materials testing; Plastic insulation; Polymers; Stress; Voltage;
Conference_Titel :
Electrical Insulating Materials, 2001. (ISEIM 2001). Proceedings of 2001 International Symposium on
Conference_Location :
Himeji
Print_ISBN :
4-88686-053-2
DOI :
10.1109/ISEIM.2001.973699
