In this paper the combined electro-thermal life model for the insulation of power cables is extended in order to include the volume enlargement law, whereby the statistical breakdown behavior with the increase of insulation volume is accounted for. In this way, a new comprehensive model is obtained, whose usefulness lies in that it includes the effect of volume enlargement - beside that of electrical and thermal stresses - on life estimation. This combination is particularly useful for power cables. Indeed, the extrapolation from laboratory test results to in-field expectations implies a significant enlargement process over cable insulation volume, since life tests are performed using short cable lengths and, furthermore, “mini-cables” most of times. Consequently the estimation of life expectation of a full size cable installed in field cannot disregard the volume enlargement law. In the paper, the novel extended life model is illustrated and discussed considering both AC and DC high voltage power cables.

Merging the electro-thermal life model for power cables with the statistical volume enlargement law / M. Marzinotto; G.Mazzanti. - ELETTRONICO. - (2014), pp. 502-505. (Intervento presentato al convegno 2014 IEEE Conference on Electrical Insulation and Dielectric Phenomena (IEEE CEIDP 2014) tenutosi a Des Moines, Iowa (USA) nel 19-23 ottobre 2014) [10.1109/CEIDP.2014.6995888].

Merging the electro-thermal life model for power cables with the statistical volume enlargement law

MAZZANTI, GIOVANNI
2014

Abstract

In this paper the combined electro-thermal life model for the insulation of power cables is extended in order to include the volume enlargement law, whereby the statistical breakdown behavior with the increase of insulation volume is accounted for. In this way, a new comprehensive model is obtained, whose usefulness lies in that it includes the effect of volume enlargement - beside that of electrical and thermal stresses - on life estimation. This combination is particularly useful for power cables. Indeed, the extrapolation from laboratory test results to in-field expectations implies a significant enlargement process over cable insulation volume, since life tests are performed using short cable lengths and, furthermore, “mini-cables” most of times. Consequently the estimation of life expectation of a full size cable installed in field cannot disregard the volume enlargement law. In the paper, the novel extended life model is illustrated and discussed considering both AC and DC high voltage power cables.
2014
Atti della 2014 IEEE Conference on Electrical Insulation and Dielectric Phenomena (IEEE CEIDP 2014)
502
505
Merging the electro-thermal life model for power cables with the statistical volume enlargement law / M. Marzinotto; G.Mazzanti. - ELETTRONICO. - (2014), pp. 502-505. (Intervento presentato al convegno 2014 IEEE Conference on Electrical Insulation and Dielectric Phenomena (IEEE CEIDP 2014) tenutosi a Des Moines, Iowa (USA) nel 19-23 ottobre 2014) [10.1109/CEIDP.2014.6995888].
M. Marzinotto; G.Mazzanti
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/450167
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