Title :
Rail track distributed transmission line impedance and admittance: theoretical modeling and experimental results
Author :
Hill, R. John ; Carpenter, David C.
Author_Institution :
Sch. of Electr. Eng., Bath Univ., UK
fDate :
5/1/1993 12:00:00 AM
Abstract :
Frequency-dependent distributed transmission line self and mutual impedances and admittances for a single-track, power-rail electrified railway are obtained by experiment and modeling. Impedance results obtained by numerical calculation from an electromagnetic minimum energy field solution using the finite-element method are compared with analytic impedance models based on the Carson-Pollaczek equations for a stratified, weakly conducting ground and with practical experimental measurements made on a short length of rail track. The running rail self conductances and the power rail to running rail mutual capacitances are also evaluated by the finite-element method and compared with experimental measurements. A physical interpretation of the results is given in terms of conductive and induced ground currents caused by finite ground conductivity and relative permittivity
Keywords :
distribution networks; electric admittance; electric impedance; finite element analysis; railways; transmission line theory; Carson-Pollaczek equations; analytic impedance models; conductive currents; distributed transmission line admittance; distributed transmission line impedance; finite-element method; induced ground currents; mutual admittances; mutual impedances; power rail to running rail mutual capacitances; power-rail electrified railway; rail track; running rail self conductances; self admittances; self impedances; Admittance; Electromagnetic analysis; Electromagnetic fields; Finite element methods; Frequency; Impedance; Power transmission lines; Rail transportation; Railway electrification; Transmission lines;
Journal_Title :
Vehicular Technology, IEEE Transactions on
