TY - JOUR
T1 - Electric-field analysis of spacer cable systems for compact overhead distribution lines
AU - Ramirez-Vazquez, Isaias
AU - Espino-Cortes, Fermin P.
N1 - Funding Information:
Manuscript received February 02, 2012; revised May 27, 2012; accepted July 07, 2012. Date of publication September 10, 2012; date of current version September 19, 2012. This work was supported by the National Polytechnic Institute and CONACYT in Mexico City. Paper no. TPWRD-00113-2012. I. Ramírez-Vázquez is with the Instituto de Investigaciones Eléctricas in Re-forma 113, Cuernavaca 62490, Morelos, México (e-mail: iramirez@iie.org.mx). F. P. Espino-Cortés is with the Electrical Engineering Department, f SEPI-ESIME Zacatenco, Instituto Politécnico Nacional (IPN), U. P. “Adolfo López Mateos,” Mexico City 07738, Mexico (e-mail: fpespino@gmail.com). Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TPWRD.2012.2209186
PY - 2012
Y1 - 2012
N2 - Spacer cable systems (SCS) have been shown to be an appropriate solution to reduce the fault rates within wooden areas. Although the SCS are designed as a coordinated system with dielectric compatibility between materials, electrical tracking on the insulating materials has been reported once in operation. The problem of high electric-field concentration on the contact points between the covered conductor and spacer or ties cannot be controlled by modifying the material properties since the issue is more related to the zero-angle contact points. In this paper, 3-D finite-element modeling is used to compute the electric-field distribution on SCS. According to the simulation results, the electric-field enhancement seen around the seat area of the spacer is in contact with the cable and can be reduced to some degree by using materials with the same dielectric properties; however, even if the materials are compatible, an intense electric field on the area of contact is present. It is considered that instead of trying to find an exact match of the materials properties, the tracking resistance must be improved as much as possible in order to extend the service life of the system.
AB - Spacer cable systems (SCS) have been shown to be an appropriate solution to reduce the fault rates within wooden areas. Although the SCS are designed as a coordinated system with dielectric compatibility between materials, electrical tracking on the insulating materials has been reported once in operation. The problem of high electric-field concentration on the contact points between the covered conductor and spacer or ties cannot be controlled by modifying the material properties since the issue is more related to the zero-angle contact points. In this paper, 3-D finite-element modeling is used to compute the electric-field distribution on SCS. According to the simulation results, the electric-field enhancement seen around the seat area of the spacer is in contact with the cable and can be reduced to some degree by using materials with the same dielectric properties; however, even if the materials are compatible, an intense electric field on the area of contact is present. It is considered that instead of trying to find an exact match of the materials properties, the tracking resistance must be improved as much as possible in order to extend the service life of the system.
KW - Compact power distribution lines
KW - covered conductor
KW - finite-element method
KW - spacer cable system
UR - http://www.scopus.com/inward/record.url?scp=84866691595&partnerID=8YFLogxK
U2 - 10.1109/TPWRD.2012.2209186
DO - 10.1109/TPWRD.2012.2209186
M3 - Artículo
SN - 0885-8977
VL - 27
SP - 2312
EP - 2317
JO - IEEE Transactions on Power Delivery
JF - IEEE Transactions on Power Delivery
IS - 4
M1 - 6298064
ER -