Title :
Experimental evaluation of a UHV tower model for lightning surge analysis
Author :
Yamada, T. ; Mochizuki, A. ; Sawada, J. ; Zaima, E. ; Kawamura, T. ; Ametani, A. ; Ishii, M. ; Kato, S.
Author_Institution :
Tokyo Electr. Power Co. Inc., Japan
fDate :
1/1/1995 12:00:00 AM
Abstract :
An experimental investigation was performed on a UHV tower model for the EMTP multiconductor calculation of lightning overvoltage at substations associated with back-flashover at an adjacent transmission tower. The various lightning surge response characteristics were measured on an actual UHV tower, and parameters of a multistory transmission tower model that can reproduce voltages across the insulator strings, voltages of the crossarms, and voltages of the power lines were determined. A value of 120 Ω was determined as the surge impedance at each section of the multistory tower model, which closely agreed with the tower surge impedance measured for the UHV tower alone
Keywords :
electric impedance measurement; flashover; lightning protection; poles and towers; power system analysis computing; power system transients; power transmission lines; surges; transient analysis; 120 ohm; EMTP multiconductor calculation; UHV tower model; adjacent transmission tower; back-flashover; crossarms; insulator strings; lightning overvoltage; lightning surge analysis; lightning surge response characteristics; multistory transmission tower model; power lines; substations; surge impedance; tower surge impedance measurement; voltage reproduction; EMTP; Electromagnetic analysis; Impedance; Insulation; Lightning; Performance analysis; Poles and towers; Substations; Surges; Voltage control;
Journal_Title :
Power Delivery, IEEE Transactions on
