Behavior of XLPE for HVDC Cables under Thermo-Electrical Stress: Experimental Study and Ageing Kinetics Proposal

The present work deals with the study of electrical behavior cross-linked polyethylene (XLPE) used for HVDC cable insulation. aim is to better understand influences and thermal stresses on insulating material in order provide useful information designing cables. This was carried out Rogowski samples made XLPE insulation semiconductive electrodes, aged more than 3 years (1220 days) at three different temperatures (70, 80 90 °C) under two DC electric fields (30 60 kV/mm). Dielectric loss factor, volume resistivity space charge accumulation were measured. Results are analyzed cross-correlated, propose possible ageing kinetics.