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Communication Dans Un Congrès Année : 2016

DC field distribution in XLPE-insulated DC model cable with polarity reversal and thermal gradient

Gilbert Teyssedre
T. T. N. Vu
N. Sinisuka
  • Fonction : Auteur

Résumé

The electric field distribution in polymer dielectric under DC stress is temperature and time dependent and it can be determined by using conductivity which is also dependent on field and temperature. The distribution of the field, that directly impacts the cable performances, is driven by the conduction mechanisms and settles with giving rise to a space charge distribution across the insulation. To predict conductivity-related electric field distributions, conduction current measurement under various electrical and thermal conditions in time need to be recorded. The current measurement is eventually made with polarity reversal in order to relate to the field distribution under this condition. The aim of this paper is to observe and investigate the steady state and transient electric field distribution in miniaturized HVDC power cables with construction of 1.5 mm cross-linked polyethylene (XLPE) insulation thickness. The determination of field distribution is achieved by computation using current-voltage model for current transient in cable geometry approach. Both isothermal and thermal gradient conditions for the cable are analyzed, as a function of stressing time and applied voltage. The most critical stresses for the model cases are identified.
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Dates et versions

hal-03943779 , version 1 (19-01-2023)

Identifiants

Citer

N. Adi, Gilbert Teyssedre, T. T. N. Vu, N. Sinisuka. DC field distribution in XLPE-insulated DC model cable with polarity reversal and thermal gradient. IEEE International Conference on High Voltage Engineering and Application (ICHVE 2016), Sept. 19-22, 2016, Chengdu (CHINA), Sep 2016, Chengdu, China. 4 p., ⟨10.1109/ICHVE.2016.7800612⟩. ⟨hal-03943779⟩
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