Method for supplying power to a railway vehicle, station supply system, related on-board power-storage system and rail vehicle

The method involves receiving electric energy by a fixed static direct current converter (11) located at a stopping station (10) of a railway vehicle i.e. tramcar (1). The electric energy is transferred by the converter to a destination of an electric energy storage system (7) when the vehicle is stopped in the station, where the converter provides direct voltage (V3) to the storage system depending on a charging state of the storage system. The storage system is charged based on the transferred energy under the voltage provided by the converter. Independent claims are also included for the following: (1) a system for supplying electric energy to a railway vehicle (2) an electric energy storage system.