Revision, extension, and validation of Jordan's formula to calculate the surge impedance of vertical conductors

• Published in: IEEE transactions on electromagnetic compatibility Vol. 48; no. 3; pp. 530 - 536
• Main Authors: De Conti, A., Visacro, S., Soares, A., Schroeder, M.A.O.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.08.2006; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Conductors; Disturbances. Regulation. Protection; Electrical engineering. Electrical power engineering; Electrical power engineering; Electromagnetic compatibility; Electromagnetic transient analysis; Exact sciences and technology; Impedance; Information, signal and communications theory; lightning; Mathematical models; numerical analysis; Poles and towers; Power networks and lines; power transmission lines; Representations; Strikes; Surges; Telecommunications and information theory; Towers; power transmission lines; Numerical analysis; Experimental data; Electromagnetic transient analysis; Lightning; Electromagnetic compatibility; Electromagnetic field; Hybrid model; Multiconductor line; Transient analysis; Power transmission line
• ISSN: 0018-9375; 1558-187X
• DOI: 10.1109/TEMC.2006.879345

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