TY - JOUR
T1 - A 3-D FDTD Thin-Wire Model of Single-Core Coaxial Cables With Multiple Conductive Layers
AU - Li, Binghao
AU - Du, Ya Ping
AU - Chen, Mingli
AU - Li, Zhe
N1 - Funding Information:
Manuscript received April 3, 2020; revised October 15, 2020; accepted November 6, 2020. Date of publication November 26, 2020; date of current version June 11, 2021. The work was supported in part by the grants from the Research Grants Council of the HKSAR under Project 152100/17E and Project 152080/19E and in part by the Research Committee of the HK PolyU. (Corresponding author: Yaping Du.) Binghao Li, Yaping Du, and Mingli Chen are with the Department of Building Services Engineering, The Hong Kong Polytechnic University, Hong Kong (e-mail: [email protected]; [email protected]; [email protected]).
Publisher Copyright:
© 1964-2012 IEEE.
PY - 2021/6
Y1 - 2021/6
N2 - In this article, a thin-wire model of single-core coaxial cables with three or more conductive layers is proposed for transient analysis using the finite-difference time-domain (FDTD) method. The multilayer cable is regarded as a series of 2-conductor coaxial transmission lines. The currents in these lines can be, however, unbalanced, and may not return via earth, such as in the case of a direct lightning strike. The FDTD method is employed to evaluate electromagnetic coupling outside the cable. Frequency-dependent surface impedances of conductors are fully considered using the Bessel functions. They are integrated into the time-domain analysis with a vector fitting technique. Updating equations for both lossless and lossy cables are derived. The proposed model is validated transmission line theory analytically and with the traditional FDTD method numerically. Good agreements are observed. Finally, the proposed model is applied to analyze the transients in a cable connection station under a direct lightning strike.
AB - In this article, a thin-wire model of single-core coaxial cables with three or more conductive layers is proposed for transient analysis using the finite-difference time-domain (FDTD) method. The multilayer cable is regarded as a series of 2-conductor coaxial transmission lines. The currents in these lines can be, however, unbalanced, and may not return via earth, such as in the case of a direct lightning strike. The FDTD method is employed to evaluate electromagnetic coupling outside the cable. Frequency-dependent surface impedances of conductors are fully considered using the Bessel functions. They are integrated into the time-domain analysis with a vector fitting technique. Updating equations for both lossless and lossy cables are derived. The proposed model is validated transmission line theory analytically and with the traditional FDTD method numerically. Good agreements are observed. Finally, the proposed model is applied to analyze the transients in a cable connection station under a direct lightning strike.
KW - Coaxial cable
KW - Coaxial cables
KW - Conductors
KW - Finite difference methods
KW - finite-difference time-domain (FDTD)
KW - frequency-dependent loss
KW - Mathematical model
KW - multilayer conductors
KW - Power cables
KW - thin wire
KW - Time-domain analysis
KW - Wires
UR - http://www.scopus.com/inward/record.url?scp=85097151961&partnerID=8YFLogxK
U2 - 10.1109/TEMC.2020.3037939
DO - 10.1109/TEMC.2020.3037939
M3 - Journal article
AN - SCOPUS:85097151961
SN - 0018-9375
VL - 63
SP - 762
EP - 771
JO - IEEE Transactions on Electromagnetic Compatibility
JF - IEEE Transactions on Electromagnetic Compatibility
IS - 3
M1 - 9272335
ER -