Abstract

Electric energy storage systems have been known for a long time. In order to store energy the following"br" solutions may be used: mechanical (rotating wheels, compressed air), chemical (hydrogen), electrical (batteries"br" and supercapacitors), and others. Supercapacitors and batteries are most common in electric traction systems."br" They are installed in vehicles and substations. They are most widely used in traction power supply systems of"br" 600 V DC and are mainly intended for storage of braking energy, which allows saving energy. Work has begun"br" on the storage of braking energy in the 3 kV DC system and research and measurements are carried out. In the"br" paper, the concept of an energy storage system designed to be used on 3 kV DC power supply system is"br" presented, where batteries are used as the energy storage systems. It is designed to work in traction substations"br" and sectioning cabins. It can be used on all DC traction power supply systems.