Title :
FD-TD analysis of nonuniform multiconductor lossy lines
Author :
Celozzi, S. ; Feliziani, M.
Author_Institution :
Dept. of Electr. Eng., Univ. of Rome ´´La Sapienza´´, Italy
Abstract :
Transients in lossy nonuniform multiconductor lines are analyzed by the transmission line model (TLM) assuming quasi-transverse-electromagnetic (TEM) propagation. Voltage and current wave propagation is described by integrodifferential equations with variable coefficients, where a convolution integral between the transient impedance and the time derivative of the current is used to model the skin effect in the conductors. The resulting system of equations is solved by the finite difference time domain (FD-TD) method. An algorithm for the recursive calculation of the convolution integrals is proposed. Distributed nonuniformities, due to line parameter variation, and lumped nonuniformities, due to loads, junctions, and discontinuities, are considered
Keywords :
electromagnetic compatibility; electromagnetic wave propagation; finite difference time-domain analysis; integro-differential equations; transmission line theory; FDTD analysis; TEM propagation; TLM; convolution integral; current wave propagation; discontinuities; distributed nonuniformities; finite difference time domain; integrodifferential equations; junctions; line parameter variation; loads; lumped nonuniformities; nonuniform multiconductor lossy lines; quasi-transverse electromagnetic propagation; recursive calculation; skin effect; time derivative; transient impedance; transients; transmission line model; variable coefficients; voltage wave propagation; Convolution; Impedance; Integral equations; Integrodifferential equations; Multiconductor transmission lines; Power system transients; Propagation losses; Skin effect; Transient analysis; Voltage;
Conference_Titel :
Electromagnetic Compatibility, 1993. Symposium Record., 1993 IEEE International Symposium on
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-1304-6
DOI :
10.1109/ISEMC.1993.473712
