Energy storage system

• US 9,954,367 B2
• Filed: 08/30/2013
• Issued: 04/24/2018
• Est. Priority Date: 09/28/2012
• Status: Active Grant

• Current Assignee: Enrichment Technology Company Limited
• Original Assignee: Enrichment Technology Company Limited
• Inventors: vor dem Esche, Ing. Rainer, Schfer, Christoph, Treppmann, Ing. Christoph
• Primary Examiner(s): Hiltunen, Thomas J
• Application Number:
  US14/430,459
• Publication Number:
  US 20150318701A1
• Time in Patent Office: 1,698 Days
• CPC Class Codes: H02J 3/30 using dynamo-electric machines coupled to flywheels
• CPC Class Codes: Y02E 60/16 Mechanical energy storage, e.g. flywheels or pressurised fluids

Abstract

An energy storage system is provided with one or more local energy storage systems and a procedure to operate such an energy storage system. The local energy storage systems are connected to a non-local power supply grid and/or one or more local power supply grids each compromising at least one local control unit, which is intended at least for control of the respective energy storage system for localized regulating and system tasks (LRS) for the one or more respective local power supply grids. The energy storage system furthermore comprises a central control unit connected via the communication network to the respective local control units, which is intended for control (SNL) of absorbing (En) and emitting (Ep) energy of the one or more local energy storage systems to the non-local power supply grid, with the central control unit being equipped to dispose of all portions of the local storage capacities (LSKg).

Claims

1. An energy storage system, comprising one or more local energy storage systems with a respective local storage capacity and local output suitable for absorbing and emitting energy from and to connected power supply grid, with the one or more local energy storage systems each being connected to a non-local power supply grid and/or one or more local power supply grids, but at least comprising one local control unit to control the respective energy storage system for localized regulating and system tasks for the one or more respective local power supply grids and the energy storage system further comprising a central control unit connected via a communication network to the respective local control unit to control absorbing and emission of energy from the one or more local energy storage systems to the non-local power supply grid, with the central control unit being equipped for disposing of all portions of the local storage capacities and of the local output of the one or more energy storage systems for non-localized regulating and system tasks in the non-local power supply grid that have been submitted by the respective local control units to the central control unit via the communication network as not needed for the localized regulating and system tasks,

wherein the central control unit receives operating data from the local control units via the communication network and submits at least non-localized regulating and system tasks based on the submitted operating data of the local energy storage system or systems for emission of energy to the non-local power supply grid and/or to absorb energy from the non-local power supply grid via the communication network.

2. The energy storage system according to claim 1, characterized in that the local energy storage system comprises one or more flywheel energy accumulators to absorb energy from the connected power supply grids and to emit energy to the connected power supply grids.

3. The energy storage system according to claim 1, characterized in that the local energy storage system comprises one or more measuring units to measure one or more relevant data in the respective connected power supply grid and the control unit to execute control of the local energy storage system for the respective connected power supply grid based on the measured relevant data.

4. The energy storage system according to claim 1, characterized in that the local energy storage system comprises a control unit to which the one or more local power supply grids and the non-local power supply grid are connected, with the control unit designed to control an energy flow between the connected power supply grids and the energy storage system.

5. The energy storage system according to claim 4, characterized in that the control unit further to disconnect one or more of the connected power supply grids from the local energy storage system on demand.

6. The energy storage system according to claim 1, characterized in that the local energy storage system comprises a task storage for storage of the localized and non-localized regulating and system tasks that is configured and/or updated by the central control unit at least regarding the non-localized regulating or system tasks in the non-local power supply grid and which the local control unit accesses for control of the local energy storage according to the non-localized and localized regulating or system tasks.

7. The energy storage system according to claim 6, characterized in that the local control unit is designed to give the localized regulating and system tasks for control of the respective energy storage system precedence over the non-localized regulating and system tasks.

8. The energy storage system according to claim 1, characterized in that the local energy storage system exclusively executes the localized regulating and system tasks for the one or more respective local power supply grids in the task storage at failure of the communication network and/or of the central control unit.

9. An energy storage system comprising one or more local energy storage systems with a respective local storage capacity and local output suitable for absorbing and emitting energy from and to connected power supply grid, with the one or more local energy storage systems each being connected to a non-local power supply grid and/or one or more local power supply grids, but at least comprising one local control unit to control the respective energy storage system for localized regulating and system tasks for the one or more respective local power supply grids and the energy storage system further comprising a central control unit connected via a communication network to the respective local control unit to control absorbing and emission of energy from the one or more local energy storage systems to the non-local power supply grid, with the central control unit being equipped for disposing of all portions of the local storage capacities and of the local output of the one or more energy storage systems for non-localized regulating and system tasks in the non-local power supply grid that have been submitted by the respective local control units to the central control unit via the communication network as not needed for the localized regulating and system tasks, wherein the central control unit further to determine which of the local energy storage systems are ready for black start support and that black start support takes precedence over the localized regulating and system tasks for the one or more respective connected local power supply grids.

10. The energy storage system according to claim 9 characterized in that the local energy storage system comprises one or more flywheel energy accumulators to absorb energy from the connected power supply grids and to emit energy to the connected power supply grids.

11. The energy storage system according to claim 9 characterized in that the local energy storage system comprises one or more measuring units to measure one or more relevant data in the respective connected power supply grid and that the control unit further to execute control of the local energy storage system for the respective connected power supply grid based on the measured relevant data.

12. The energy storage system according to claim 9 characterized in that the local energy storage system comprises a control unit to which the one or more local power supply grids and the non-local power supply grid are connected, with the control unit designed to control an energy flow between the connected power supply grids and the energy storage system.

13. The energy storage system comprising one or more local energy storage systems with a respective local storage capacity and local output suitable for absorbing and emitting energy from and to connected power supply grid, with the one or more local energy storage systems each being connected to a non-local power supply grid and/or one or more local power supply grids, but at least comprising one local control unit to control of the respective energy storage system for localized regulating and system tasks for the one or more respective local power supply grids and the energy storage system further comprising a central control unit connected via a communication network to the respective local control unit to control absorbing and emission of energy from the one or more local energy storage systems to the non-local power supply grid, with the central control unit being equipped for disposing of all portions of the local storage capacities and of the local output of the one or more energy storage systems for non-localized regulating and system tasks in the non-local power supply grid that have been submitted by the respective local control units to the central control unit via the communication network as not needed for the localized regulating and system tasks, wherein the central control unit comprises one or more interfaces for external systems for receipt of external data for superordinate control of the energy storage system and to determine individual or a number of local energy storage systems for non-localized regulating or system tasks in the non-local power supply grid over other local energy storage systems and form a regulating network for the non-local power supply grid based on these external data.

14. The energy storage system according to claim 13, characterized in that the control units of the energy storage systems of the regulating network and/or the regional network are designed to communicate with each other directly via the communication network for execution of the non-localized regulating or system tasks and/or regional regulating and system tasks without inclusion of the central control unit.

15. The energy storage system according to claim 14, characterized in that the central control unit at least temporarily assigns the task of control of the regulating network and/or the regional network to a local control unit in the regulating network and/or in the regional network determined by the central control unit.

16. The energy storage system according to claim 14, characterized in that the central control unit submits a hierarchy of the local control units in the regulating network and/or in the regional network together with the transfer of the control task, with the local control unit following in the hierarchy to control the regulating network and/or the regional network at failure of the control unit charged with control or the corresponding local energy storage system.

17. The energy storage system according to claim 13 characterized in that the local energy storage system comprises one or more flywheel energy accumulators to absorb energy from the connected power supply grids and to emit energy to the connected power supply grids.

18. The energy storage system according to claim 13 characterized in that the local energy storage system comprises one or more measuring units to measure one or more relevant data in the respective connected power supply grid and that the control unit further to execute control of the local energy storage system for the respective connected power supply grid based on the measured relevant data.

19. The energy storage system according to claim 13 characterized in that the local energy storage system comprises a control unit to which the one or more local power supply grids and the non-local power supply grid are connected, with the control unit designed to control an energy flow between the connected power supply grids and the energy storage system.

20. An energy storage system comprising one or more local energy storage systems with a respective local storage capacity and local output suitable for absorbing and emitting energy from and to connected power supply grid, with the one or more local energy storage systems each being connected to a non-local power supply grid and/or one or more local power supply grids, but at least comprising one local control unit to control of the respective energy storage system for localized regulating and system tasks for the one or more respective local power supply grids and the energy storage system further comprising a central control unit connected via a communication network to the respective local control unit to control absorbing and emission of energy from the one or more local energy storage systems to the non-local power supply grid, with the central control unit being equipped for disposing of all portions of the local storage capacities and of the local output of the one or more energy storage systems for non-localized regulating and system tasks in the non-local power supply grid that have been submitted by the respective local control units to the central control unit via the communication network as not needed for the localized regulating and system tasks, wherein the central control unit further to determine individual or a number of local energy storage systems which form a regional network from the specific energy storage systems based on local or non-local influence data and to submit to them additional or changed priority localized regulating and system tasks as regional regulating and system tasks.

21. The energy storage system according to claim 20 characterized in that the local energy storage system comprises one or more flywheel energy accumulators to absorb energy from the connected power supply grids and to emit energy to the connected power supply grids.

22. The energy storage system according to claim 20 characterized in that the local energy storage system comprises one or more measuring units to measure one or more relevant data in the respective connected power supply grid and that the control unit further to execute control of the local energy storage system for the respective connected power supply grid based on the measured relevant data.

23. The energy storage system according to claim 20 characterized in that the local energy storage system comprises a control unit to which the one or more local power supply grids and the non-local power supply grid are connected, with the control unit designed to control an energy flow between the connected power supply grids and the energy storage system.

24. An energy storage system comprising one or more local energy storage systems with a respective local storage capacity and local output suitable for absorbing and emitting energy from and to connected power supply grid, with the one or more local energy storage systems each being connected to a non-local power supply grid and/or one or more local power supply grids, but at least comprising one local control unit to control of the respective energy storage system for localized regulating and system tasks for the one or more respective local power supply grids and the energy storage system further comprising a central control unit connected via a communication network to the respective local control unit to control absorbing and emission of energy from the one or more local energy storage systems to the non-local power supply grid, with the central control unit being equipped for disposing of all portions of the local storage capacities and of the local output of the one or more energy storage systems for non-localized regulating and system tasks in the non-local power supply grid that have been submitted by the respective local control units to the central control unit via the communication network as not needed for the localized regulating and system tasks, wherein the local control unit is designed to periodically review the present connection with the central control unit via the communication network and the local control unit is designed to recover this connection in case of interruption of the connection with the central control unit via an alternative sub-communication network in the communication network.

25. The energy storage system according to claim 24 characterized in that the local energy storage system comprises one or more flywheel energy accumulators to absorb energy from the connected power supply grids and to emit energy to the connected power supply grids.

26. The energy storage system according to claim 24 characterized in that the local energy storage system comprises one or more measuring units to measure one or more relevant data in the respective connected power supply grid and that the control unit further to execute control of the local energy storage system for the respective connected power supply grid based on the measured relevant data.

27. The energy storage system according to claim 24 characterized in that the local energy storage system comprises a control unit to which the one or more local power supply grids and the non-local power supply grid are connected, with the control unit designed to control an energy flow between the connected power supply grids and the energy storage system.

28. A procedure for operation of an energy storage systems comprising one or more local energy storage systems with a respective local storage capacity and local output, which are suitable to absorb and emit energy from/to connected power supply grids, comprising:

Controlling of the respective local energy storage system for localized regulating and system tasks in one or more local power supply grids connected to the local energy storage system by a local control unit in the scope of the capacity and output of the energy storage system for the one or more local power supply grids,

Submitting of the capacities and output not required for the localized regulating and system tasks of the local energy storage system by the local control unit via a connected communication network to a central control unit also connected to the communication network, and

Controlling of the respective local energy storage system to absorb and emit energy for non-localized regulating and system tasks in a non-local power supply grid also directly or indirectly connected to the local energy storage system by central control unit via the communication network in the scope of the portions of all capacities and output of the energy storage system not required for the localized regulating and system tasks submitted to the central control unit.

29. The procedure according to claim 28, further compromising:

Configuring and/or updating of at least the non-local regulating or system tasks for the non-local power supply grid in one task storage of the local energy storage system, additionally comprising the localized regulating and system tasks,

Accessing of the local control unit to the task storage for control of the local energy storage,

Priority control controlling of the energy storage system for localized regulating and system tasks by the local control unit according to the task storage in the regular operation and

Exclusive execution of the localized regulating and system tasks for the one or more respective local power supply grids at failure of the communication network and/or of the central control unit.