Space charge criteria on materials for HVDC: Assessment of materials from different crosslinking routes

G. Teyssedre (1) , T. T.N. Vu (2) , I. Denizet , J. Gard , Séverine Le Roy (1) , Christian Laurent (1) , M. Mammeri

1 LAPLACE-DSF - Diélectriques Solides et Fiabilité
2 EPU - Electric Power University

Among essential issues for HVDC cable is the field distribution inside the insulation resulting from combined processes of temperature gradient in the cables, non-linear conductivity and space charge accumulation. The assessment of materials in terms of conductivity is relatively straightforward based on its dependence upon temperature and field. In terms of space charges, the exploitation of data is more debatable as not only quantitative features but also the dynamics of processed is to be analyzed. In this work we illustrate such an analysis considering space charge results obtained on materials crosslinked by different ways. The work points to the need to limit by-product contents in HVDC cable materials.

Domaines: Energie électrique

G. Teyssedre, T. T.N. Vu, I. Denizet, J. Gard, Séverine Le Roy, et al.. Space charge criteria on materials for HVDC: Assessment of materials from different crosslinking routes. 2018 12th International Conference on the Properties and Applications of Dielectric Materials (ICPADM), May 2018, Xi'an, China. pp.111-114, ⟨10.1109/ICPADM.2018.8401115⟩. ⟨hal-02396087⟩