Title :
A method for calculating the breakdown voltages of long air gaps in transmission lines: evaluation of the lightning performance of transmission lines using no shield wire
Author :
Alexandrov, G.N. ; Podporkyn, G.V. ; Shevchenko, S.Yu.
Author_Institution :
Leningrad Polytech. Inst., USSR
Abstract :
The possibility of abandoning the shield wire on EHV-UHV transmission lines has been examined. Insulation lengths required to obtain an acceptable lightning performance of lines have been determined. Experimental data indicate that unshielded lines can be built using conventional metal or ferroconcrete towers and lengthened insulator strings. However, the highest cost efficiency is achieved with towers made of insulating concrete or composite polymeric elements, since this substantially reduces the tower height and thus the consumption of materials
Keywords :
electric breakdown of gases; poles and towers; power overhead lines; EHV transmission lines; UHV transmission lines insulating towers; breakdown voltages; composite polymeric elements; consumption of materials; cost efficiency; insulating concrete; insulator strings; lightning performance; long air gaps; shield wire; tower height; transmission lines; unshielded lines; Air gaps; Concrete; Costs; Lightning; Metal-insulator structures; Plastic insulation; Poles and towers; Polymers; Transmission lines; Wire;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1988. Proceedings., Second International Conference on Properties and Applications of
Conference_Location :
Beijing
DOI :
10.1109/ICPADM.1988.38358
