Title :
Study by simulation of the effect of temperature on the appearance of partial discharges in gaseous cavities contained in the insulator of high voltage cable
Author :
Seghir, T. ; Nouar, A. ; Lefkaier, K. ; Mahi, D.
Author_Institution :
Dept. of Electr. Eng., Univ. Ammar Telidji, Laghouat, Algeria
Abstract :
Our work treat the effect of the temperature on the appearance of partial discharges in high voltage cables. We modelize the heterogeneous insulator of the cable using finite difference method. The numerical treatment is carried out in bidimensional due to the observed symmetry in the cavities. We simulate regions of weak concentration to an insulator containing one cavity, this is justified by the absence of interactions between cavities. The regions of great concentrations are simulated to an insulator, which contain two cavities in mutual interactions. Once the two cavities are in contact, we speak then of a complex defect called "bivacuole". The physical proprieties two simulate are the electrical field and the temperature. We present the results of computation obtained by an established program, this result show that the partial discharge is occurred in cavities of small diameters in regions either near the core or the wrapping. The mutual interaction between cavities contributes much the apparition of the partial discharges.
Keywords :
electric fields; finite element analysis; partial discharges; power cable insulation; temperature distribution; wrapping; bivacuole; cable insulation; complex defect; electrical field; finite difference method; gaseous cavities; heterogeneous insulator; high voltage cable; numerical treatment; partial discharges; temperature effect; wrapping; Cable insulation; Cables; Computational modeling; Contacts; Finite difference methods; Gas insulation; Partial discharges; Temperature; Voltage; Wrapping;
Conference_Titel :
Power Tech Conference Proceedings, 2003 IEEE Bologna
Print_ISBN :
0-7803-7967-5
DOI :
10.1109/PTC.2003.1304635