Electrical power supply system

1 . An electrical power supply system, comprising: a segmented DC bus including a plurality of segments, with two of the plurality of segments each include at least one feed; a first rectifier constructed as a diode rectifier, a second rectifier comprising switchable power semiconductors; and a generator designed to supply power to the first and second rectifiers for supply of power to the DC bus, wherein an output power the first rectifier is at least ⅓ of an output power of the second rectifier, and wherein the output power of the second rectifier is at least ⅓ of the output power of the first rectifier, and wherein the two segments supply different loads separately from one another.

2 . The electrical power supply system of claim 1 , constructed for a microgrid.

3 . The electrical power supply system of claim 1 , wherein one of the plurality of segments of the DC bus include only one feed designed as an external feed.

4 . The electrical power supply system of claim 1 , wherein the generator is a first generator for supplying power to a first one of the two segments of the DC bus, and further comprising:

a second generator for supplying power to a second one of the two segments of the DC bus, and

a switch segmenting the first and the second segments.

5 . The electrical power supply system of claim 1 , further comprising a grid connection located distal from the electrical power supply system.

6 . The electrical power supply system of claim 1 , further comprising a gas turbine or a diesel driving the generator.

7 . The electrical power supply system of claim 1 , wherein the generator is an asynchronous machine or a synchronous machine, said generator including an open circuit.

8 . The electrical power supply system of claim 1 , wherein the DC bus is a DC bus of a ship, supplying power to a marine propulsion motor.

9 . The electrical power supply system of claim 1 , further comprising a filter disposed in an electrical connection of the generator to at least one of the first rectifier and second rectifiers.

10 . The electrical power supply system of claim 1 , wherein the second rectifier comprises an IGBT three-phase bridge.

11 . The electrical power supply system of claim 1 , wherein the DC bus comprises a capacitor.

12 . A method for operating an electrical power supply system comprising a segmented DC bus which includes a plurality of segments, with at least two of the plurality of segments each including at least one feed, the method comprising:

supplying power to the segmented DC bus from a first rectifier constructed as a diode rectifier and from a second rectifier comprising switchable power semiconductors, with the first rectifier having an output power which is at least ⅓ of an output power of the second rectifier; and the output power of the second rectifier being at least ⅓ of the output power of the first rectifier,

switching the first and second rectifiers at different times depending on a connected load, and

activating the feeds of the at least two segments depending on the connected load.

13 . The method of claim 12 , further comprising supplying power via a generator to the first and second rectifiers for supply of power to the DC bus.

14 . The method of claim 13 , further comprising placing a filter in an electrical connection of the generator to at least one of the first rectifier and second rectifiers.

15 . The method of claim 12 , further comprising designing one of the plurality of segments of the DC bus with only one feed as an external feed.

16 . The method of claim 12 , further comprising:

supplying power to a first one of the two segments of the DC bus via a first generator;

supplying power to a second one of the two segments of the DC bus via a second generator, and

segmenting the first and the second segments.