electrical supply system of a load, and power generation electric power comprising such a system

The system (20) power supply of a load (22) comprises: - a converter (48) adapted to be connected at its input to a current source (14, 29) and output to the load (22), the converter (48) being adapted to deliver current to the load (22) and to allow current flow in a single direction from the source (14, 29) current to the load (22), and - a bus (16) for circulating an electric current, having a first end (33) and a second end (34). The power system (20) further comprises: - means (50) for injecting an alternative additional voltage in the second end (34) of the traffic bus (16), the injection device (50) being connected to said second end (34), and - means (52) for recovering the alternative additional voltage injected, the recovery device (52) being connected between the first end (33) of the bus and the load (22) in order to supply the load (22) with electric current.