Title :
Surge-induced temperature rise in water-containing defects in XLPE: mechanism for conversion of water trees to electrical trees
Author :
Boggs, Steven ; Densley, John ; Kuang, Jinbo
Author_Institution :
Electr. Insulation Res. Center, Connecticut Univ., Storrs, CT, USA
Abstract :
Circumstantial evidence suggests that large water trees convert to electrical trees as a result of lightning-induced surges. Computations employing transient nonlinear finite element analysis suggest that such conversion involves boiling of the water which results in creation of a cavity which can support partial discharge
Keywords :
XLPE insulation; electrical conductivity; finite element analysis; partial discharges; power cable insulation; space charge; surges; transients; trees (electrical); PD initiation; XLPE cable insulation; cavity creation; electrical trees; finite element analysis; lightning-induced surges; partial discharge; surge-induced temperature rise; transient nonlinear FEA; water boiling; water tree to electrical tree conversion; water trees; water-containing defects; Conductivity; Lightning; Partial discharges; Polymers; Surges; Temperature; Thermal stresses; Trees - insulation; Underwater tracking; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1996., IEEE 1996 Annual Report of the Conference on
Conference_Location :
Millbrae, CA
Print_ISBN :
0-7803-3580-5
DOI :
10.1109/CEIDP.1996.564689
