Reducing electric-power losses in a traction network due to the voltage grading at the busbars of dc traction substations

Abstract

The voltage mode in a traction network may cause unwanted power flows, which, in turn, lead to power losses in the traction network. In this paper, it is shown theoretically and on the basis of a computer simulation that the equality of voltages at the busbars of all substations ensures minimum electric-energy losses in the traction network under any changes in the parameters of the traction power-supply system and the train situation. An algorithm for controlling the voltage at the busbars of traction substations is proposed for leveling it throughout the entire section of electric dc railways.