System and substation for feeding an electrical traction network

The system has transforming stations (60, 62) transforming a high alternating voltage into a low alternating voltage. The stations have high alternating voltage inlets (64, 66) and low alternating voltage outlets (70, 72) respectively. Alternating voltage distribution networks (8, 10) are connected between the outlets of the stations and inlets of alternating voltage sub-stations (20-23).