Methods of managing energy processes on metro rolling stock with asynchronous drive and capacitive energy storage systems

The article deals with the further development of the newly constructed and deeply modernised metro railway vehicles by introducing capacitive energy storage systems. It has been demonstrated that in the context of the introduction of on-board capacitive energy storage on metro rolling stock, the synthesis of methods for managing energy flows between the contact network, power traction and braking equipment, and capacitive energy storage remains an insufficiently studied issue. The paper is aimed at developing methods and algorithms for managing energy processes on metro railway vehicles with capacitive energy storage systems, with the possibility of taking into account the operation of the metro power supply system in both normal and emergency modes. The flowchart configuration of the energy process control system capable of monitoring the occurrence of emergency modes in the metro traction power supply system is described. Three different methods and algorithms for managing energy processes during the movement of a metro train in the traction mode under the normal operation of the power supply system have been developed. A new concept of managing energy processes in the metro rolling stock is proposed, which provides for the possibility of powering the train traction equipment from capacitive energy storage systems in the event of a power failure in the contact network due to the use of two control zones. Idealised oscillograms of energy processes in the contact network and power circuits are constructed for the developed control methods depending on the modes of train operation and the operation of the energy supply system on the example of the specified charac-teristics of rolling stock and capacitive energy storage systems. An algorithm for managing energy processes during the movement of a metro train with capacitive energy storage systems in the mode of traction, run-up, regenerative braking during normal and emergency operation of the metro power supply system is proposed. The need to focus further efforts on studying the efficiency of each of the developed control methods and algorithms in order to establish the most promising one is outlined.