Research on power-frequency electromagnetic interference model of multicore twisted signal cable of high-speed railway

Abstract

With the increase in the traction power of high-speed railways, the power-frequency electromagnetic interference of traction current to the signal cables becomes increasingly more severe. In this paper, the calculation modelof the magnetic interference to signal cable was established on the MATLAB/Simulink platform based on the multiconductor transmission line theory. This model took SPTYWPL03-8B 8-core twist signal cable as an example and thepower-frequency interference of external current to the signal cable was analyzed theoretically. In addition, experimentson electromagnetic interference of double-ended and single-ended signal cables were performed to validate the simulationmodel. Experiments showed that the relative error was less than 5% by comparing the experimental and simulationresults. This research is helpful for the quantitative analysis of the power-frequency electromagnetic interference oftraction current to signal cables.