DocumentCode :
535655
Title :
Voltage uprating of overhead transmission lines
Author :
Bhattarai, R. ; Haddad, A. ; Griffiths, H. ; Harid, N.
Author_Institution :
High Voltage Energy Syst. Group, Cardiff Univ., Cardiff, UK
fYear :
2010
fDate :
Aug. 31 2010-Sept. 3 2010
Firstpage :
1
Lastpage :
6
Abstract :
In recent years, uprating of existing overhead power line has become a popular option for electric utilities to address increasing demand for power. Uprating overhead line by increasing voltage allows considerable increase in power transfer capability. This paper initially examines technical issues and conventional methods of uprating the voltage of overhead transmission lines. It then considers a case of existing 275kV line in L3 tower to analyse these issues and propose appropriate process for its possible uprating to 400kV system. In this case, phase-to-earth clearance was found to be a key issue for voltage uprating. Application of line surge arresters along the line was proposed for controlling overvoltage thereby reducing the minimum required clearance for 400kV system.
Keywords :
arresters; electricity supply industry; power overhead lines; electric utilities; overhead transmission lines; surge arresters; voltage 275 kV; voltage 400 kV; voltage uprating; Insulation; Lightning; Poles and towers; Surges; Switches; Voltage control; Backflashover; Clearance; Current Uprating; Insulation Coordination; Lightning Impulse; Overvoltage; Shielding Failure; Surge Arrester; Transmission Line; Voltage Uprating;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Universities Power Engineering Conference (UPEC), 2010 45th International
Conference_Location :
Cardiff, Wales
Print_ISBN :
978-1-4244-7667-1
Type :
conf
Filename :
5649454
Link To Document :
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