DocumentCode :
1207582
Title :
Transients on multiconductor transmission lines above dissipative earth-numerical simulation and measurement
Author :
Van der Merwe, Jaco ; Cloete, Johannes Hendrik ; Reader, Howard Charles
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Stellenbosch, South Africa
Volume :
45
Issue :
2
fYear :
2003
fDate :
5/1/2003 12:00:00 AM
Firstpage :
404
Lastpage :
415
Abstract :
A finite-difference time-domain (FDTD) analysis is presented to simulate, up to the high-frequency regime, transients on multiconductor transmission lines above dissipative earth. Excitation is in the high-frequency regime if the pulse has significant spectral content up to ω≈ωc, with ωc the frequency where the conduction and displacement current densities have equal magnitude. Thus, ωcg0εrg with σg and εrg the ground conductance and relative permittivity. The FDTD algorithm extends the formulation of Agrawal et al. (1980), by incorporating the theory of D´Amore and Sarto for the interaction of wide-band transients with the earth. Careful experimental testing of the new algorithm is presented. The measurement configuration consists of two parallel wires; first suspended above an aluminum sheet to test the code in the low-frequency regime; then above a block of absorbing material for experiments in the high-frequency regime. The end of one of the conductors is driven with a 2-ns synthesized impulse by a stepped-frequency, automatic network analyzer. Reflected and cross-talk signals are presented in the time domain. These show good agreement with the numerically predicted common mode, differential mode and mode-converted pulses.
Keywords :
aluminium; convolution; crosstalk; finite difference time-domain analysis; multiconductor transmission lines; network analysers; transient analysis; transients; transmission line theory; Al; Al sheet; FDTD algorithm; FDTD analysis; absorbing material; automatic network analyzer; common mode pulses; conduction; crosstalk signals; differential mode pulses; displacement current densities; dissipative earth; ground conductance; high-frequency regime; low-frequency regime; measurement configuration; mode-converted pulses; multiconductor transmission lines; numerical simulation; reflected signals; relative permittivity; stepped-frequency ANA; time domain measurements; transients; wideband transients; Analytical models; Conducting materials; Earth; Finite difference methods; Frequency; Multiconductor transmission lines; Power system transients; Time domain analysis; Transient analysis; Transmission line measurements;
fLanguage :
English
Journal_Title :
Electromagnetic Compatibility, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9375
Type :
jour
DOI :
10.1109/TEMC.2003.811297
Filename :
1200885
Link To Document :
بازگشت