STORAGE INTEGRATED MANAGEMENT SYSTEMS FOR ENERGY MICROGRIDS

• US 20120215368A1
• Filed: 12/28/2011
• Published: 08/23/2012
• Est. Priority Date: 02/23/2011
• Status: Abandoned Application

• Current Assignee: NEC Laboratories America Inc (NEC Corporation)
• Original Assignee: NEC Laboratories America Inc (NEC Corporation)
• Inventors: Sharma, Ratnesh
• Application Number:
  US13/339,201
• Publication Number:
  US 20120215368A1
• Time in Patent Office: Days
• US Class Current: 700/287
• CPC Class Codes: H02J 3/32 using batteries with converting means
• CPC Class Codes: Y02P 80/14 District level solutions, i.e. local energy networks

Abstract

Systems and methods are provided to manage power storage, by generating power with one or more microgenerators; charging an ensemble of energy storage devices to receive power from the one or more microgenerators; abstracting the ensemble of storage resources with different characteristics, a dynamic and a current model of the load, and user-defined policies for operation, and matching a demand profile with a predetermined mix of energy supply from storage devices.

Claims

1. An energy management system, comprising:

one or more microgenerator(s);

an ensemble of energy storage devices to receive power from the one or more microgenerator(s) or the grid; and

a device manager coupled to the ensemble of storage devices, wherein the device manager stores an abstraction of the ensemble of storage resources with different characteristics, a dynamic and a current model of the load, and user-defined policies for operation, and wherein the controller matches a demand profile with a predetermined mix of energy supply from storage devices.

2. The system of claim 1, wherein the device manager models ramp rate, peak power and energy per cycle, cycle life, cost of ownership and round trip efficiency.

3. The system of claim 1, wherein the device manager comprises operational modes including trade-off policies between efficiency, cycle life, cost of ownership and performance.

4. The system of claim 1, wherein the device manager determines conversion efficiency of providing electrical power as

η

_i=f_i(DOD,T)

where i is an index for a specific storage technology, DOD is the depth of discharge and T is temperature.

5. The system of claim 1, wherein the user defined policies determine the suitability of certain devices for an application and quantify a lifetime impact on the device and cost of providing energy.

6. The system of claim 1, wherein the storage devices support base load, peak load, and instantaneous load.

7. The system of claim 1, wherein the device manager provides load leveling and voltage/frequency stability.

8. The system of claim 1, wherein the device manager maintains energy storage device health and safety.

9. The system of claim 1, wherein the device manager controls the energy storage devices as a dispatchable source in a microgrid.

10. The system of claim 1, wherein the device manager assesses the energy storage device health and disconnects the energy storage device from a grid, and operates the energy storage device in an islanded mode for certain period of time.

11. A method to manage power storage, comprising

generating power with one or more microgenerators;

charging an ensemble of energy storage devices to receive power from the one or more microgenerators;

abstracting the ensemble of storage resources with different characteristics, a dynamic and a current model of the load, and user-defined policies for operation, and

matching a demand profile with a predetermined mix of energy supply from storage devices.

12. The method of claim 11, comprising modeling ramp rate, peak power and energy per cycle, cycle life, cost of ownership and round trip efficiency.

13. The method of claim 11, operating the energy storage devices with trade-off policies between efficiency, cycle life, cost of ownership and performance.

14. The method of claim 11, comprising determining conversion efficiency of providing electrical power as

η

_i=f_i(DOD,T)

where i is an index for a specific storage technology, DOD is the depth of discharge and T is temperature.

15. The method of claim 11, comprising applying user defined policies to determine the suitability of certain devices for an application and quantify a lifetime impact on the device and cost of providing energy.

16. The method of claim 11, wherein each energy storage devices include a base load, peak load, and instantaneous load.

17. The method of claim 11, further comprising assessing the energy storage device health and disconnects the energy storage device from a grid, and operating the energy storage device in an islanded mode for certain period of time.

18. The method of claim 11, wherein the device manager provides load leveling and voltage/frequency stability.

19. The method of claim 11, wherein the device manager maintains energy storage device health and safety.

20. The method of claim 11, wherein the device manager controls the energy storage devices as a dispatchable source in a microgrid.