DocumentCode :
1553525
Title :
Elemental strain and trapped space charge in thermoelectrical aging of insulating materials: life modeling
Author :
Mazzanti, G. ; Montanari, G.C. ; Dissado, L.A.
Author_Institution :
Dipt. di Ingegneria Elettrica, Bologna Univ., Italy
Volume :
8
Issue :
6
fYear :
2001
fDate :
12/1/2001 12:00:00 AM
Firstpage :
966
Lastpage :
971
Abstract :
On the basis of the new concept of elemental strain, used to describe a possible aging process occurring in polymeric materials, the expression for the life model, already proposed in a previous paper, must be modified, taking into account the possibility that the local strain is an elemental property of the polymer morphology, as suggested by molecular quantum calculations. By doing so, a connection can be established between the life model and space charge densities as revealed by experiments. The derivation of this new model and the correlation with analytical measurements is the subject of this paper. Applying this connection to electrical aging and space charge data for the same crosslinked polyethylene (XLPE) material has resulted in a set of material factors that we have demonstrated are both consistent with experiments and also produce physically feasible space charge fields that are capable of driving the proposed aging mechanism to the extent required
Keywords :
XLPE insulation; ageing; space charge; crosslinked polyethylene; elemental strain; insulating material; life model; molecular quantum mechanical theory; polymer morphology; thermoelectrical aging; trapped space charge; Aging; Bonding; Capacitive sensors; Dielectrics and electrical insulation; Drives; Partial discharges; Plastic insulation; Polymers; Space charge; Thermoelectricity;
fLanguage :
English
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
Publisher :
ieee
ISSN :
1070-9878
Type :
jour
DOI :
10.1109/94.971453
Filename :
971453
Link To Document :
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