Title :
Revision, extension, and validation of Jordan´s formula to calculate the surge impedance of vertical conductors
Author :
De Conti, Alberto ; Visacro, Silvério ; Soares, Amilton, Jr. ; Schroeder, Marco Aurelio O
Author_Institution :
Univ. Fed. de Minas Gerais, Belo Horizonte
Abstract :
Jordan´s formula to calculate the surge impedance of vertical conductors is revised and extended to take into account systems with multiple conductors. Experimental data and the hybrid electromagnetic model are applied in order to validate the derived expressions. Additionally, Jordan´s formula is successfully used in the representation of an actual tower as a multiconductor vertical system. The obtained results indicate the usefulness of the derived expressions if an engineering analysis of direct strikes over elevated strike objects is required
Keywords :
multiconductor transmission lines; poles and towers; surges; Jordan formula; hybrid electromagnetic model; multiconductor vertical system; tower representation; vertical conductor surge impedance; Conductors; Electromagnetic modeling; Equations; Impedance; Lightning; Poles and towers; Power engineering and energy; Power system transients; Power transmission lines; Surges; Electromagnetic transient analysis; lightning; numerical analysis; power transmission lines;
Journal_Title :
Electromagnetic Compatibility, IEEE Transactions on
DOI :
10.1109/TEMC.2006.879345
