Electric Field Distribution in HVDC Cable Joint in Non-Stationary Conditions

G. Teyssedre (1) , Thi Thu Nga Vu (2) , Séverine Le Roy (1)

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

Accessories such as joints and terminations represent a weak point in HVDC cable systems. Indeed, the DC field distribution is intimately dependent on the thermal condition of the accessory and on material properties. Moreover, there is no available method to probe charge distribution in those conditions. In this work, the field distribution in non-stationary conditions, both thermally and electrically, is computed considering different insulating materials assembled in a same geometry, with focus on the tangential field distribution. We show that the position of the maximum field varies in time in a way that is not easy to anticipate. The work points to the need of precise data on materials conductivity and to the need to probe field distribution in 3D.

Mots clés: FEM simulation; XLPE; HVDC cable joints; field distribution

Domaines: Matériaux; Energie électrique

G. Teyssedre, Thi Thu Nga Vu, Séverine Le Roy. Electric Field Distribution in HVDC Cable Joint in Non-Stationary Conditions. 13th International Conference on the Properties and Applications of Dielectric Materials (ICPADM 2021), Jul 2021, Johor Bahru (virtuel), Malaysia. pp.406-409, ⟨10.1109/ICPADM49635.2021.9493863⟩. ⟨hal-03326472⟩