TY - JOUR
T1 - Extended Traveling Wave Theory for the Multistage Tower under a Direct Lightning Strike
AU - Ding, Yuxuan
AU - Li, Binghao
AU - Du, Ya Ping
AU - Chen, Mingli
AU - Li, Zhe
AU - Zhao, Yu Ming
N1 - Funding Information:
Manuscript received May 20, 2020; revised August 7, 2020 and September 8, 2020; accepted October 5, 2020. Date of publication October 28, 2020; date of current version June 11, 2021. This work was supported in part by the Research Grants Council of the HKSAR under Project 15208019 and Project 15210018). (Corresponding author: Ya Ping Du.) Yuxuan Ding, Binghao Li, Ya Ping Du, and Mingli Chen are with the Department of Building Services Engineering, The Hong Kong Polytechnic University, Hong Kong (e-mail: [email protected]; binghao. [email protected]; [email protected]; [email protected]).
Publisher Copyright:
© 1964-2012 IEEE.
PY - 2021/6
Y1 - 2021/6
N2 - This article presents a theoretical time-domain analysis of lightning surge propagation on a multistage and multi-conductor tower. An extended traveling wave theory using electric scalar potential is introduced. The non-TEM wave propagation in the tower is characterized by time/position-variant transient impedance. The analytical formulas of the transient impedance are presented for any position/time in the tower, as well as those of the reflection coefficient at a discontinuity. The concept of primary and secondary waves is introduced to depict the multiple reflections in the tower. It is found that the primary current wave attenuates during its propagation in the tower, and is corrected by a factor when crossing over the discontinuity. A pair of secondary waves is generated at the discontinuity, similar to a center-fed dipole. The proposed method is applied to evaluate the lightning current in a two-stage tower. The result of the proposed method is of high consistency with the FDTD result. It is also observed that the secondary waves could be neglected if the reflection coefficient is small. The traditional transmission line theory could lead to a significant error of the current in the tower.
AB - This article presents a theoretical time-domain analysis of lightning surge propagation on a multistage and multi-conductor tower. An extended traveling wave theory using electric scalar potential is introduced. The non-TEM wave propagation in the tower is characterized by time/position-variant transient impedance. The analytical formulas of the transient impedance are presented for any position/time in the tower, as well as those of the reflection coefficient at a discontinuity. The concept of primary and secondary waves is introduced to depict the multiple reflections in the tower. It is found that the primary current wave attenuates during its propagation in the tower, and is corrected by a factor when crossing over the discontinuity. A pair of secondary waves is generated at the discontinuity, similar to a center-fed dipole. The proposed method is applied to evaluate the lightning current in a two-stage tower. The result of the proposed method is of high consistency with the FDTD result. It is also observed that the secondary waves could be neglected if the reflection coefficient is small. The traditional transmission line theory could lead to a significant error of the current in the tower.
KW - Dipole
KW - lightning
KW - tower
KW - transmission line
UR - http://www.scopus.com/inward/record.url?scp=85096111921&partnerID=8YFLogxK
U2 - 10.1109/TEMC.2020.3030413
DO - 10.1109/TEMC.2020.3030413
M3 - Journal article
AN - SCOPUS:85096111921
SN - 0018-9375
VL - 63
SP - 830
EP - 839
JO - IEEE Transactions on Electromagnetic Compatibility
JF - IEEE Transactions on Electromagnetic Compatibility
IS - 3
M1 - 9241772
ER -