Hybrid electric generating power plant that uses a combination of real-time generation facilities and energy storage system

• US 9,847,648 B2
• Filed: 12/29/2016
• Issued: 12/19/2017
• Est. Priority Date: 06/20/2011
• Status: Active Grant

• Current Assignee: Fluence Energy LLC (AES Corporation)
• Original Assignee: AES Corporation
• Inventors: Shelton, John Christopher, Geinzer, Jay Craig, Galura, Brett Lance, Meersman, Steven Christianne Gerard
• Primary Examiner(s): Ali, Mohammad
• Assistant Examiner(s): AZAD, MD ABUL K
• Application Number:
  US15/394,400
• Publication Number:
  US 20170110882A1
• Time in Patent Office: 355 Days
• Field of Search: 700297
• CPC Class Codes: H02J 2300/10 The dispersed energy generation being of fossil origin, e.g. diesel generators
• CPC Class Codes: H02J 2300/20 The dispersed energy generation being of renewable origin
• CPC Class Codes: H02J 2300/24 of photovoltaic origin
• CPC Class Codes: H02J 2300/28 The renewable source being wind energy wind motors F03D
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence
• CPC Class Codes: H02J 7/34 Parallel operation in networks using both storage and other dc sources, e.g. providing buffering H02J7/14 takes precedence
• CPC Class Codes: H02M 7/44 by static converters
• CPC Class Codes: H02M 7/68 by static converters
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers
• CPC Class Codes: Y02E 10/76 Power conversion electric or electronic aspects

Abstract

Approaches for controlling power supplied to an electric grid are disclosed. In embodiments, methods and systems control power supplied to an electric grid using an energy storage device. In an embodiment, a method receives an indication of power to be supplied to the electric grid, generates power from a power generator and adjusts, using the generated power, an energy level of the energy storage device to control power supplied to the grid in accordance with the received indication. In another embodiment, a system comprises a grid indication receiver for receiving an indication of power to be supplied to the electric grid; a power generator connected to the grid; an energy storage device coupled to the power generator; and a controller for adjusting, using the generated power from the generator, an energy level of the energy storage device to control power supplied to the grid in accordance with the received indication.

Claims

1. A method of controlling power supplied to an electric grid using at least one energy storage device to store energy, the method comprising:

generating power from at least one power generator;

receiving, by the controller, an optimum discharge and storage profile of the at least one energy storage device or a predetermined power discharge and storage profile of the at least one energy storage device;

adjusting, by the controller, the storage of energy by the at least one energy storage device according to the optimum discharge and storage profile or the predetermined power discharge and storage profile of the at least one energy storage device; and

adjusting, based on the optimum or predetermined power discharge and storage profile of the at least one energy storage device, power generation from the at least one power generator to satisfy an indication of power to be supplied to the electric grid,

wherein the optimum or the predetermined power discharge and storage profile of the at least one energy storage device and an optimum or a predetermined ramp profile of the at least one power generator are based on at least two factors selected from the group consisting of;

(1) wear and tear on respective equipment;

(2) an optimum rate of change of the at least one power generator;

(3) a fuel consumption rate profile of the at least one power generator;

(4) a state of charge (SOC) of the at least one energy storage device;

(5) a durability of the respective equipment;

(6) costs of initial acquisition and depreciation of the at least one power generator and the at least one energy storage device; and

(7) transmission losses of the power distributed by the electric grid.

2. The method of claim 1, further comprising:

operating the at least one energy storage device in a manner to reduce emissions of the at least one power generator.

3. The method of claim 1, wherein the at least one power generator is in a standby state, and when the indication of power to be supplied to the electric grid is received, the at least one energy storage device provides required power while the at least one power generator moves into an active state.

4. The method of claim 1, wherein the indication of power to be supplied to the electric grid includes both real power and reactive power components.

5. The method of claim 1, wherein the indication of power to be supplied to the electric grid indicates a present power supply level to be supplied to the electric grid that is based on wear and tear or transmission losses over the electric grid.

6. The method of claim 1, wherein output from the at least one power generator and the at least one energy storage device are controlled to:

1) optimize ramp rate for the combination of the at least one power generator and the at least one energy storage device;

2) reduce maintenance of the at least one power generator and/or the at least one energy storage device;

or

3) reduce spinning reserve services of the at least one power generator based on a power supply level of the at least one energy storage device.

7. A non-transitory computer readable storage medium having instructions stored thereon that, in response to execution by a computing device, cause the computing device to perform operations for controlling power supplied to an electric grid using at least one energy storage device to store energy, the operations comprising:

generating power from at least one power generator;

receiving an optimum discharge and storage profile of the at least one energy storage device or a predetermined power discharge and storage profile of the at least one energy storage device;

adjusting the storage of energy by the at least one energy storage device according to the optimum discharge and storage profile or the predetermined power discharge and storage profile of the at least one energy storage device; and

adjusting, based on the optimum or predetermined power discharge and storage profile of the at least one energy storage device, power generation from the at least one power generator to satisfy an indication of power to be supplied to the electric grid,

wherein the optimum or the predetermined power discharge and storage profile of the at least one energy storage device and an optimum or a predetermined ramp profile of the at least one power generator are based on at least two factors selected from the group consisting of;

(1) wear and tear on respective equipment;

(2) an optimum rate of change of the at least one power generator;

(3) a fuel consumption rate profile of the at least one power generator;

(4) a state of charge (SOC) of the at least one energy storage device;

(5) a durability of the respective equipment;

(6) costs of initial acquisition and depreciation of the at least one power generator and the at least one energy storage device; and

(7) transmission losses of the power distributed by the electric grid.

8. The non-transitory computer readable storage medium of claim 7, further comprising:

operating the at least one energy storage device in a manner to reduce emissions of the at least one power generator.

9. The non-transitory computer readable storage medium of claim 7, wherein the at least one power generator is in a standby state, and when the indication of power to be supplied to the electric grid is received, the at least one energy storage device provides required power while the at least one power generator moves into an active state.

10. The non-transitory computer readable storage medium of claim 7, wherein the indication of power to be supplied to the electric grid includes both real power and reactive power components.

11. The non-transitory computer readable storage medium of claim 7, wherein the indication of power to be supplied to the electric grid indicates a present power supply level to be supplied to the electric grid that is based on wear and tear or transmission losses over the electric grid.

12. The non-transitory computer readable storage medium of claim 7, wherein output from the at least one power generator and the at least one energy storage device are controlled to:

1) optimize ramp rate for the combination of the at least one power generator and the at least one energy storage device;

2) reduce maintenance of the at least one power generator and/or the at least one energy storage device;

or

3) reduce spinning reserve services of the at least one power generator based on a power supply level of the at least one energy storage device.

13. A system for controlling power supplied to an electric grid, the system comprising:

at least one power generator configured to generate power, the at least one power generator being connected to the electric grid;

at least one energy storage device configured to store energy, the at least one energy storage device being coupled to the at least one power generator and the electric grid;

a controller configured to receive an optimum discharge and storage profile of the at least one energy storage device or a predetermined power discharge and storage profile of the at least one energy storage device, adjust the storage of energy by the at least one energy storage device according to the optimum discharge and storage profile or the predetermined power discharge and storage profile of the at least one energy storage device, and adjust, based on the optimum or predetermined power discharge and storage profile of the at least one energy storage device, power generation from the at least one power generator to satisfy an indication of power to be supplied to the electric grid,

wherein the optimum or the predetermined power discharge and storage profile of the at least one energy storage device and an optimum or a predetermined ramp profile of the at least one power generator are based on at least two factors selected from the group consisting of;

(1) wear and tear on respective equipment;

(2) an optimum rate of change of the at least one power generator;

(3) a fuel consumption rate profile of the at least one power generator;

(4) a state of charge (SOC) of the at least one energy storage device;

(5) a durability of the respective equipment;

(6) costs of initial acquisition and depreciation of the at least one power generator and the at least one energy storage device; and

(7) transmission losses of the power distributed by the electric grid.

14. The system of claim 13, wherein the at least one energy storage device operates in a manner to reduce emissions of the at least one power generator.

15. The system of claim 13, wherein the at least one power generator is in a standby state, and when the indication of power to be supplied to the electric grid is received, the at least one energy storage device provides required power while the at least one power generator moves into an active state.

16. The system of claim 13, wherein the indication of power to be supplied to the electric grid includes both real power and reactive power components.

17. The system of claim 13, wherein the indication of power to be supplied to the electric grid indicates a present power supply level to be supplied to the electric grid that is based on wear and tear or transmission losses over the electric grid.

18. The system of claim 13, wherein output from the at least one power generator and the at least one energy storage device are controlled to:

1) optimize ramp rate for the combination of the at least one power generator and the at least one energy storage device;

2) reduce maintenance of the at least one power generator and/or the at least one energy storage device;

or

3) reduce spinning reserve services of the at least one power generator based on a power supply level of the at least one energy storage device.

19. An apparatus for controlling power supplied to an electric grid using at least one power generator and at least one energy storage device coupled to the electric grid, the apparatus comprising:

a controller configured to receive an optimum discharge and storage profile of the at least one energy storage device or a predetermined power discharge and storage profile of the at least one energy storage device, adjust the storage of energy by the at least one energy storage device according to the optimum discharge and storage profile or the predetermined power discharge and storage profile of the at least one energy storage device, and adjust, based on the optimum or predetermined power discharge and storage profile of the at least one energy storage device, power generation from the at least one power generator to satisfy an indication of power to be supplied to the electric grid,

wherein the optimum or the predetermined power discharge and storage profile of the at least one energy storage device and an optimum or a predetermined ramp profile of the at least one power generator are based on at least two factors selected from the group consisting of;

(1) wear and tear on respective equipment;

(2) an optimum rate of change of the at least one power generator;

(3) a fuel consumption rate profile of the at least one power generator;

(4) a state of charge (SOC) of the at least one energy storage device;

(5) a durability of the respective equipment,

(6) costs of initial acquisition and depreciation of the at least one power generator and the at least one energy storage device; and

(7) transmission losses of the power distributed by the electric grid.

20. The apparatus of claim 19, wherein the at least one energy storage device operates in a manner to reduce emissions of the at least one power generator.

21. The apparatus of claim 19, wherein the at least one power generator is in a standby state, and when the indication of power to be supplied to the grid is received, the at least one energy storage device provides required power while the at least one power generator moves into an active state.

22. The apparatus of claim 19, wherein the indication of power to be supplied to the grid includes both real power and reactive power components.

23. The apparatus of claim 19, wherein the indication of power to be supplied to the grid indicates a present power supply level to be supplied to the grid that is based on wear and tear or transmission losses over the power grid.

24. The apparatus of claim 19, wherein output from the at least one power generator and the at least one energy storage device are controlled to:

1) optimize ramp rate for the combination of the at least one power generator and the at least one energy storage device;

2) reduce maintenance of the at least one power generator and/or the at least one energy storage device;

or

3) reduce spinning reserve services of the at least one power generator based on a power supply level of the at least one energy storage device.