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Publisher: IEEE
Languages: English
Types: Article
Subjects: TA
The life expressions of models of insulation ageing are functions of temperature and field as well as material parameters. A methodology is presented that allows these models to be applied to a cable geometry in which there is a radial variation of both field and temperature. In this way material parameters can be extracted from cable data. The methodology is illustrated using one such model and the parameters deduced from cable failure distributions are compared with those obtained for thin films. This comparison allows conclusions to be drawn about how the ageing process affects specimens of the same material with different volumes.
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    • [7] T.J. Lewis, J.P. Llewellyn, M.J. van der Sluijs, „Electrokinetic properties of metaldielectric interfaces‟, IEE Proceedings-A, Vol. 140, No 5, pp.385-392, September 1993
    • [8] T.J. Lewis, J.P. Llewellyn, M.J. van der Sluijs, „Electrically induced mechanical Strain in Insulating Dielectrics‟, IEEE Annual report CEIDP, pp 328-333, 1994.
    • [9] T.J. Lewis, J.P. Llewellyn, M.J. van der Sluijs, J. Freestone, R.N. Hampton, „Electromechanical Effects in XLPE Cable Models‟, Proc.5th ICSD, (IEEE Pub. 95CH3476-9), pp. 269-273, 1995
    • [10] P. Connor, J.P. Jones, J.P Llewellyn and T.J. Lewis, „Electric Field-Induced Viscoelastic Changes in Insulating Polymer Films‟, Ann. Rep. CEIDP, pp27-30, 1998
    • [11] C.L. Griffiths, J.Freestone and R.N. Hampton, „Thermoelectric Aging of Cable Grade XLPE‟, Proc. IEEE ISEI, pp.578-582, 1998.
    • [12] P.W. Sayers, T.J. Lewis, J.P Llewellyn and C.L. Griffiths „Investigation of the Structural Changes in LDPE and XLPE Induced by high Electrical Stress‟, IEE DMMA, Conf Pub No 473, pp. 403-407, 2000
    • [13] C.L. Griffiths, S. Betteridge, J.P. Llewellyn and T.J. Lewis, „The Importance of Mechanical Properties for Increasing the Electrical Endurance of Polymeric Insulation, IEE DMMA, Conf Pub No 473, pp. 408-411, 2000
    • [14] J.L. Parpal, J.P. Crine and C. Dang, „Electrical Ageing of Extruded Dielectric Cables - a physical model‟, IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 4, No 2, pp 197-209, 1997
    • [15] J.P. Crine, „A Molecular Model to Evaluate the Impact of Aging on Space Charges in Polymer Dielectrics‟, IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 4, No 5, pp487-495, 1997
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