System to store and to transmit electrical power

• US 20120175949A1
• Filed: 09/10/2010
• Published: 07/12/2012
• Est. Priority Date: 09/30/2009
• Status: Active Grant

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Stiesdal, Henrik, Wolf, Erik
• Granted Patent: US 9,142,969 B2
• Time in Patent Office: Days
• US Class Current: 307/9.1
• CPC Class Codes: H02J 3/02 using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
• CPC Class Codes: H02J 3/30 using dynamo-electric machines coupled to flywheels
• CPC Class Codes: H02J 4/00 Circuit arrangements for mains or distribution networks not specified as ac or dc
• CPC Class Codes: Y02E 60/16 Mechanical energy storage, e.g. flywheels or pressurised fluids

Abstract

A system to store and to transmit electrical power includes at least one storage system, at least one bidirectional converter, and at least one load coupled to a network, wherein the load is adapted to both, receive electrical power from the network and supply electrical power to the network. A first storage system is used to store electrical power of a power source. The first storage system is connected to a first bidirectional converter by a DC power transmission system. The first bidirectional converter is connected to an AC network and the AC network is connected to a first load.

Claims

1-15. -15. (canceled)

16. A system to store and to transmit electrical power, comprising

at least one storage system comprising a central storage system,

at least one bidirectional converter comprising a first bidirectional converter,

at least one load coupled to an AC network and adapted to both, receive electrical power from the AC network and supply electrical power to the AC network, wherein the at least one load comprises a first load,

wherein the central storage system is used to store electrical power of a power source,

wherein the central storage system is connected to the first bidirectional converter by a DC power transmission system,

wherein the first bidirectional converter is connected to the AC network, and

wherein the AC network is connected to the first load.

17. The system according to claim 16,

wherein the at least one bidirectional converter comprises a second bidirectional converter and the at least one load comprises a second load,

wherein the central storage system is further connected to the second bidirectional converter by the DC power transmission system,

wherein the second bidirectional converter is connected to the AC network,

wherein the AC network is connected to the second load, and

wherein the AC network comprises a switch being used either to couple the first bidirectional converter and the first load to the second bidirectional converter and the second load or to decouple the first bidirectional converter and the first load from the second bidirectional converter and the second load.

18. The system according to claim 16, wherein the at least one load is a vehicle.

19. The system according to claim 16, wherein the central storage system is connected to the DC transmission system directly.

20. The system according to claim 16, wherein the central storage system is connected to the DC transmission system through an AC/DC converter and/or through a DC/DC converter.

21. The system according to claim 20, wherein the AC/DC converter) and/or the DC/DC converter is a bidirectional converter.

22. The system according to claim 16, wherein the central storage system comprises at least one element selected from the group consisting of:

a hydrogen storage, a molten salt storage, and a pumped hydro storage.

23. The system according to claim 16,

wherein the at least one storage system further comprises a decentral storage system, and

wherein the decentral storage system is connected to the AC network through one of that bidirectional converters.

24. The system according to claim 23, wherein the decentral storage system is connected to the DC transmission system through one of that bidirectional converters and over that DC transmission system to the central storage system.

25. The system according to claim 23, wherein the decentral storage system comprises an electro-chemical, an electrical or a mechanical storage.

26. The system according to claim 16, wherein a controller is connected to the at least one storage system.

27. The system according to claim 16, wherein an energy management system adapted to control energy flows is connected with at least one element from the group consisting of:

the at least one storage system, the at least one converter, the at least one load, a switch, and the AC network.

28. The system according to claim 27, wherein the energy management system is adapted to control at least one of:

the movement of the at least one load, and

a switching operation of the switch for selectively powering a sub-section of the network.

29. The system according to claim 16, wherein the power source comprises at least one power source system which is connected to the DC transmission system.

30. The system according to claim 29, wherein the power source system comprises renewable power sources selected from the group consisting of:

wind power sources, solar power sources and hydro power sources.

31. The system according to claim 30, wherein the power source system comprises at least one back-up power source is connected to the DC transmission system for compensating variations of the renewable power source.