The Energy Efficiency of an Automatic Control System of Subway Train Movement and Requirements for Its Subsystems

Abstract

A review has been carried out of methods for increasing the energy efficiency of automatic control over the movement of subway trains: choosing an energy optimal sequence of train control modes, distributing the travel time along the line for travel times over the sections between stations, and using the regenerative braking mode. The results of a study related to the influence of the automatic control system on the energy consumption for traction by train are presented. An analysis of the effect of the increase in the time of impact braking in conditions of different types of sections between stations on additional energy consumption at a given train travel time over the section between stations both in the absence and in the presence of a regenerative brake was carried out. The requirements for the path correction sensors, which should provide the necessary accuracy of the train positioning during intense braking, are formulated. A comparison of corrective sensors based on infrared signals and RFID sensors is made. The effect of changing the travel time on the section between stations in order to compensate for the discrepancy between the planned and executed traffic graphs for additional energy consumption was analyzed. In conditions of intense traffic, the requirements for the permissible error in the execution of a given train travel time over the range are ±2.5 s.