POWER GRID SYSTEM AND METHOD OF CONSOLIDATING POWER INJECTION AND CONSUMPTION IN A POWER GRID SYSTEM

• US 20170372438A1
• Filed: 06/10/2015
• Published: 12/28/2017
• Est. Priority Date: 10/23/2014
• Status: Abandoned Application

• Current Assignee: Sun Electric Digital Stream Incorporated
• Original Assignee: Sun Electric Pte., Ltd.
• Inventors: PELOSO, Matthew
• Application Number:
  US15/520,914
• Publication Number:
  US 20170372438A1
• Time in Patent Office: Days
• CPC Class Codes: G05B 19/042 using digital processors G05B19/05 takes precedence
• CPC Class Codes: G05B 2219/2639 Energy management, use maximum of cheap power, keep peak load low
• CPC Class Codes: G06N 7/01 Probabilistic graphical models, e.g. probabilistic networks
• CPC Class Codes: G06Q 20/102 Bill distribution or payments
• CPC Class Codes: G06Q 20/145 Payments according to the detected use or quantity
• CPC Class Codes: G06Q 50/06 Energy or water supply
• CPC Class Codes: H02J 13/00 Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
• CPC Class Codes: H02J 13/00028 involving the use of Internet protocols
• CPC Class Codes: H02J 13/00034 the elements or equipment being or involving an electric power substation
• CPC Class Codes: H02J 2203/20 Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
• 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 3/00 Circuit arrangements for ac mains or ac distribution networks
• CPC Class Codes: H02J 3/003 Load forecast, e.g. methods or systems for forecasting future load demand
• CPC Class Codes: H02J 3/28 Arrangements for balancing of the load in a network by storage of energy
• CPC Class Codes: H02J 3/38 Arrangements for parallely feeding a single network by two or more generators, converters or transformers
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• 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
• CPC Class Codes: Y02E 40/70 : Smart grids as climate change mitigation technology in the energy generation sector
• CPC Class Codes: Y02E 60/00 : Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 10/12 : Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
• CPC Class Codes: Y04S 10/123 : the energy generation units being or involving renewable energy sources
• CPC Class Codes: Y04S 10/50 : Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
• CPC Class Codes: Y04S 20/221 : General power management systems
• CPC Class Codes: Y04S 20/222 : Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 40/20 : Information technology specific aspects, e.g. CAD, simulation, modelling, system security

Abstract

A power grid system and a method of consolidating power injection and consumption in a power grid system. The power grid system comprises a power grid; at least one load connected to the power grid; a first meter configured for metering power imported from the power grid to the load; at least one intermittent power source connected to the power grid, a second meter configured for metering power generated by the intermittent power source; and a consolidation unit configured for associating readings from the first and second meters such that at least a portion of the power generated by the intermittent power source is offsettable with the power imported from the power grid to the load.

Claims

1. A power grid system comprising:

a power grid;

at least one load connected to the power grid;

a first meter configured for metering power imported from the power grid to the load;

at least one intermittent power source connected to the power grid,

a second meter configured for metering power generated by the intermittent power source; and

a consolidation unit configured for associating readings from the first and second meters such that at least a portion of the power generated by the intermittent power source is offsettable with the power imported from the power grid to the load.

2. The power grid system as claimed in claim 1, wherein the consolidation unit is configured to associate the readings from the first and second meters such that respective time profiles of the power generated by the intermittent power source and of the power imported from the power grid to the load are associated with each other.

3. The power grid as claimed in claim 2, wherein one or both of the intermittent source and the load are configured to be controllable for facilitating matching the respective time profiles to each other.

4. The power grid system as claimed in any one of the preceding claims, wherein the consolidation unit is configured to calculate a power supply cost for the load based on one or both of the associated readings from the first and second meters.

5. The power grid system as claimed in any one of the preceding claims, further comprising at least one dispatchable power source connected to the power grid and configured such that a power injection by the dispatchable power source into the power grid is adjustable responsive to one or both of the associated readings from the first and second meters.

6. The power grid system as claimed in any one of the preceding claims, wherein the intermittent source is directly connected to the power grid or via an intermediate grid-connected apparatus.

7. The power grid system as claimed in any one of the preceding claims, wherein the intermittent source and the load are located at different locations relative to the power grid or substantially at a same location relative to the power grid.

8. The power grid system as claimed in any one of the preceding claims, wherein the consolidation unit is configured for deriving a histogram of a probabilistic demand of the load over one or more time bin intervals.

9. The power grid system as claimed in any one of the preceding claims, wherein the consolidation unit is configured for deriving a histogram of a probabilistic capacity of supply from the intermittent source over one or more time bin intervals.

10. The power grid system as claimed in claim 9, wherein a power injection by one or more dispatchable power sources into the power grid is adjustable as associated with the histogram of the probabilistic capacity of supply from the intermittent source over the one or more time bin intervals.

11. The power grid system as claimed in claim 9 or 10, wherein a risk profile associated with supply to the load from one or more dispatchable power sources over the power grid is modifiable as determined by observing a modified demand profile taking into account the histogram of the probabilistic capacity of supply from the intermittent source over the one or more time bin intervals.

12. The power grid system as claimed in any one of the preceding claims, wherein the consolidation unit is configured to receive external data such as location data, radiation data, wind speed data, cloud formation patterns as imaged via satellite, other meteorological information etc.

13. The power grid system as claimed in any one of the preceding claims, wherein the consolidation unit is configured to predict or refine a supply from the intermittent source to the load.

14. The power grid system as claimed in any one of the preceding claims, wherein the consolidation unit is configured to determine a look-back supply profile or profiles of the supply from the intermittent source to the load.

15. The power grid system as claimed in any one of the preceding claims, wherein the consolidation unit is configured to determine a look-back demand profile or profiles of a demand of the load.

31. A method of supplying power using the power grid system as claimed in any one of claims 1-15.

16. A method of consolidating power injection and consumption in a power grid system, the method comprising:

metering power imported from a power grid to a load using a first meter;

metering power generated by an intermittent power source connected to the power grid using a second meter; and

associating readings from the first and second meters such that at least a portion of the power generated by the intermittent power source is offsettable with the power imported from the power grid to the load.

17. The method as claimed in claim 16, comprising associating the readings from the first and second meters such that respective time profiles of the power generated by the intermittent power source and of the power imported from the power grid to the load are associated with each other.

18. The method as claimed in claim 17, comprising controlling one or both of the intermittent source and the load for facilitating matching the respective time profiles to each other.

19. The method as claimed in any one of claims 16 to 18, comprising calculating a power supply cost for the load based on one or both of the associated readings from the first and second meters.

20. The method as claimed in any one of claims 16 to 19, further comprising adjusting a power injection by at least one dispatchable power source into the power grid responsive to one or both of the associated readings from the first and second meters.

21. The method as claimed in any one of claims 16 to 20, wherein the intermittent source is directly connected to the power grid or via an intermediate grid-connected apparatus.

22. The method as claimed in any one of claims 16 to 21, wherein the intermittent source and the load are located at different locations relative to the power grid or substantially at a same location relative to the power grid.

23. The method as claimed in any one of claims 16 to 22, comprising deriving a histogram of a probabilistic demand of the load over one or more time bin intervals.

24. The method as claimed in any one of claims 16 to 23, comprising deriving a histogram of a probabilistic capacity of supply from the intermittent source over one or more time bin intervals.

25. The method as claimed in claim 24, comprising adjusting a power injection by one or more dispatchable power sources into the power grid as associated with the histogram of the probabilistic capacity of supply from the intermittent source over the one or more time bin intervals.

26. The method as claimed in claim 24 or 25, comprising modifying a risk profile associated with supply to the load from one or more dispatchable power sources over the power grid as determined by observing a modified demand profile taking into account the histogram of the probabilistic capacity of supply from the intermittent source over the one or more time bin intervals.

27. The method as claimed in any one of claims 16 to 26, comprising considering external data such as location data, radiation data, wind speed data, cloud formation patterns as imaged via satellite, other meteorological information etc.

28. The method as claimed in any one of claims 16 to 27, comprising predicting or refining a supply from the intermittent source to the load.

29. The method as claimed in any one of claims 16 to 28, comprising determining a look-back supply profile or profiles of the supply from the intermittent source to the load.

30. The method as claimed in any one of claims 16 to 29, comprising determining a look-back demand profile or profiles of a demand of the load.

32. A method of supplying power using the method as claimed in any one of claims 16 to 30.