Abstract
The improvement of traction power supply systems of the transport complex is associated with the search for new technical solutions that can improve operational and energy efficiency, reliability and energy security. Electric energy storage systems make it possible to solve these problems. One of the aspects of the application of electrical energy storage systems is the voltage mode at the connection points. The studies of the operating modes of electric energy storage systems on mobile vehicles and stationary objects show the short duration of charge and discharge episodes due to the traction load of electric vehicles. An urgent task is to assess the change in the voltage level of electric energy storage systems in short-term modes when operating in traction power supply systems for various electric energy storage devices. The paper describes a model of the traction power supply system and electric rolling stock containing electric energy storage systems. The change in the degree of charge and voltage depending on their capacity and the time of the applied load is shown. For the conditions of the traction power supply system, the most preferable ones in terms of the minimum voltage level were selected.