Managing electric motive power modes with regard to traction energy operation conditions

Abstract

Improving the energy efficiency of electrified railways is an urgent goal, one of the possible solutions to which is the situational control of electric traction loads depending on their priority, taking into account the instantaneous load of the traction power supply system. The aim of this research is to develop a mathematical model and principles of control of electric traction trains on the basis of instantaneous traction calculations, taking into account the modes of operation of the traction power supply system of railways in conditions of energy infrastructure limitations. The paper presents the results of mathematical modeling of mutual influence of electric traction and traction power supply system on the parameters of operation, as well as the mathematical formulation of realization of operation modes of electric traction at demand management by electric traction loads applied to the considered electrified section. As a result of the calculations for one moment of time the values of adjustment of active power of electric traction trains for fulfillment of restrictions of instantaneous load of power lines of traction equipment (15.9 MW) and provision of voltages in the traction network within permissible limits in the given train situation are obtained. The presented approach will allow to obtain restrictions of train movement in the zone between substations, to determine the maximum speed of train movement on the basis of energy conditions in the real situation, to coordinate control actions between trains on the basis of their priority (schedule adjustment) depending on the load of traction substations.