Increasing the Energy Efficiency of DC Traction Power Supply Systems

Abstract

In this paper, we consider means to develop and improve a dc traction power supply systems and its adaptation for high-speed mine lines. One way to improve and increase the efficiency of the traction power supply system is to increase the rated voltage in the dc traction grid up to 24 kV. This allows increasing the throughput and carrying capacity of railways, increasing the distance between substations, and reducing the cross section of the traction grid wires and electricity losses in power supply devices. All this, as well as the absence of supply voltage unbalance under dc, inductive losses, and a significantly lower electromagnetic effect on the infrastructure, is more efficient than all ac traction power supply systems. We determined the directions of numerical modeling and proposed nonlinear numerical models that allow analyzing the interaction of sources of electromagnetic fields of traditional and superconducting electrical equipment under the conditions of an unlimited region of magnetic field propagation and the absence of symmetry of the field distribution in space. To determine the effect of electromagnetic fields on the integral parameters of traditional and superconducting electrical equipment, an algorithm and a package of applied programs were developed. We performed studies and substantiated the parameters and dimensions of superconducting inductive reactors of smoothing traction substation filters at which the volume of occupied space is minimized and the best use of superconducting material is ensured at a specified energy intensity.