DYNAMIC DISTRIBUTED POWER GRID CONTROL SYSTEM

• US 20120029720A1
• Filed: 05/02/2011
• Published: 02/02/2012
• Est. Priority Date: 07/29/2010
• Status: Abandoned Application

• Current Assignee: Avista Development, Inc. (Avistar)
• Original Assignee: Spirae, Inc.
• Inventors: Cherian, Sunil, Kley, Holger, Pacific, Oliver
• Application Number:
  US13/099,326
• Publication Number:
  US 20120029720A1
• Time in Patent Office: Days
• US Class Current: 700/297
• CPC Class Codes: G05B 19/0421 Multiprocessor system
• CPC Class Codes: G06Q 10/06 Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
• 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 13/00001 characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
• CPC Class Codes: H02J 13/00002 characterised by monitoring
• CPC Class Codes: H02J 13/00016 using a wired telecommunication network or a data transmission bus
• CPC Class Codes: H02J 13/00017 using optical fiber
• 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 2300/20 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 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 2310/58 The condition being electrical
• CPC Class Codes: H02J 2310/60 Limiting power consumption in the network or in one section of the network, e.g. load shedding or peak shaving
• CPC Class Codes: H02J 3/00 Circuit arrangements for ac mains or ac distribution networks
• CPC Class Codes: H02J 3/144 Demand-response operation of the power transmission or distribution network
• CPC Class Codes: H02J 3/16 by adjustment of reactive power
• 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: Y02B 90/20 : Smart grids as enabling technology in buildings sector smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00
• 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 40/30 : Reactive power compensation
• 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 10/123 : the energy generation units being or involving renewable energy sources
• CPC Class Codes: Y04S 10/30 : State monitoring, e.g. fault, temperature monitoring, insulator monitoring, corona discharge
• CPC Class Codes: Y04S 20/20 : End-user application control systems
• CPC Class Codes: Y04S 20/222 : Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 40/124 : using wired telecommunication networks or data transmission busses
• CPC Class Codes: Y04S 40/20 : Information technology specific aspects, e.g. CAD, simulation, modelling, system security

Abstract

A distributive and decentralized power grid control system passes aggregate information to and from hierarchal nodes. A particular node can operates without knowing anything about which specific assets are available for control below it in the hierarchy or the individual capabilities of those assets. Moreover the objective function is distributed in that parent nodes may or may not have access to all local goals of its children nodes. The computational burden for building a control solution is spread among many computational nodes within the system.

Claims

1. A method for distributive control of a distribution power grid among, comprising:

identifying at a root node of a power grid control system a global operational goal of the distribution power grid;

setting, at each of a plurality of hierarchal levels within the distribution power grid, a target goal wherein each target goal at lower hierarchal levels is a subset of target goals at higher hierarchal levels;

forming at each of the plurality of hierarchal levels one or more proposed solutions for that hierarchal level based on solutions to the target goal for lower hierarchal levels;

selecting at the root node a global solution;

communicating which of the one or more proposed solutions at each hierarchal level was selected; and

executing the one or more proposed solutions at the plurality of hierarchal levels to achieve the global operational goal.

2. The method of claim 1 wherein the global operational goal is associated with a global goal unique identifier.

3. The method of claim 2 wherein executing includes broadcasting an execution signal including the global goal unique identifier.

4. The method of claim 1 wherein the root node is an enterprise control module.

5. The method of claim 1 wherein only aggregate information is passed from lower hierarchal levels to higher hierarchal levels.

6. The method of claim 1 wherein the target goal at the root node sets target goals for each child node of the root node.

7. The method of claim 1 wherein each target goal at lower hierarchal levels is a blended target goal from one or more parent nodes.

8. The method of claim 1 responsive to no solution being possible at a particular hierarchy level, forming a solution closest to the target goal.

9. The method of claim 1 further comprising ranking the one or more proposed solutions at each hierarchal level.

10. The method of claim 1 further comprising blending at higher hierarchal levels aggregate effects of the one or more proposed solutions from lower hierarchal levels.

11. A distributive power grid control system, comprising:

a plurality of control modules operating on a plurality of hierarchal levels within a distribution power grid wherein each module sets a target goal based on a global operational goal and wherein each target goal at a lower hierarchal level is a subset of the target goal at a higher hierarchal level;

one or more proposed solutions formed at each higher hierarchal level based on solutions to the target goal for each lower hierarchal level;

a global solution to the global operational goal selected from the one or more proposed solutions at the root control module and communicated to each of the plurality of hierarchal levels; and

a signal sent to each of the plurality of control modules directing execution of the select set of solutions.

12. The control system of claim 11 wherein each target goal at the lower hierarchal level is a blended target goal from common higher hierarchal levels.

13. The control system of claim 11 wherein the global operational goal is set at a root control module.

14. The control system of claim 11 wherein the plurality of control modules includes enterprise, regional and local control modules.

15. The control system of claim 11 wherein the one or more proposed solutions are ranked.

16. The control system of claim 11 wherein only aggregate information from the lower hierarchal level is passed to the higher hierarchal level.

17. The control system of claim 11 wherein the global solution includes a select set of solutions from the one or more proposed solutions at each of the plurality of hierarchal levels.

18. The control system of claim 11 further comprising a message sent to each of the plurality of levels identifying which of the one or more proposed solutions is included in the select set of solutions.

19. The control system of claim 11 further comprising a unique identifier associating each of the one or more proposed solutions with the global operational goal.

20. The control system of claim 19 wherein the signal includes the unique identifier.

21. A computer-readable storage medium tangibly embodying a program of instructions executable by a machine wherein said program of instruction comprises a plurality of program codes for controlling a distribution power grid said program of instruction comprising:

program code for identifying at a root node of a power grid control system a global operational goal of the distribution power grid;

program code for setting, at each of a plurality of hierarchal levels within the distribution power grid, a target goal wherein each target goal at lower hierarchal levels is a subset of target goals at higher hierarchal levels;

program code for forming at each of the plurality of hierarchal levels one or more proposed solutions for that hierarchal level based on solutions to the target goal for lower hierarchal levels;

program code for selecting at the root node a global solution;

program code for communicating which of the one or more proposed solutions at each hierarchal level was selected; and

program code for executing the one or more proposed solutions at the plurality of hierarchal levels to achieve the global operational goal.

22. The program of instructions embodied in the computer-readable storage medium of claim 21, wherein only aggregate information is passed from lower hierarchal levels to higher hierarchal levels.

23. The program of instructions embodied in the computer-readable storage medium of claim 21, further comprising program code for setting target goals for each child node of the root node based on the target goal at the root node.

24. The program of instructions embodied in the computer-readable storage medium of claim 21, further comprising program code for blending each target goal at lower hierarchal levels from one or more parent nodes target goals.

25. The program of instructions embodied in the computer-readable storage medium of claim 21, wherein responsive to no solution being possible at a particular hierarchy level, further comprising program code for forming a solution closest to the target goal.

26. The program of instructions embodied in the computer-readable storage medium of claim 21, further comprising program code for ranking the one or more proposed solutions at each hierarchal level.

27. The program of instructions embodied in the computer-readable storage medium of claim 21, further comprising program code for blending at higher hierarchal levels aggregate effects of the one or more proposed solutions from lower hierarchal levels.