DISTRIBUTED ELECTRICAL POWER NETWORK MODEL MAINTENANCE

• US 20130282189A1
• Filed: 04/18/2012
• Published: 10/24/2013
• Est. Priority Date: 04/18/2012
• Status: Active Grant

• Current Assignee: Hitachi Energy Limited (Hitachi, Ltd.)
• Original Assignee: ABB Research Ltd. (ABB Limited)
• Inventors: Wang, Zhenyuan, Stoupis, James Dimitrios
• Granted Patent: US 9,520,717 B2
• Time in Patent Office: Days
• US Class Current: 700/286
• CPC Class Codes: H02J 2203/20 Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
• CPC Class Codes: H02J 3/00 Circuit arrangements for ac mains or ac distribution networks
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 40/20 Information technology specific aspects, e.g. CAD, simulation, modelling, system security

Abstract

Among other things, one or more techniques and/or systems are provided for maintaining a distributed electrical power network model associated with a power grid. A global power network model, comprising a global logical representation of the power grid, may be maintained at a network control center configured to manage one or more substations associated with the power grid. The network control center may host grid management applications that may utilize the global power network model. A local power network model, comprising a local logical representation of a power grid territory within the power grid monitored by a substation, may be maintained at the substation. The substation may host one or more local grid management applications that may utilize the local power network model. The global power network model and the local power network model may be synchronized in response to events occurring within the power grid.

Claims

1. A method for maintaining a distributed electrical power network model associated with a power grid, comprising:

maintaining a global power network model at a network control center configured to manage one or more substations associated with a power grid, the global power network model comprising a global logical representation of the power grid; and

maintaining a first local power network model at a first substation, the first local power network model comprising a local logical representation of the power grid associated with the first substation, the first local power network model based upon at least some of the global power network model.

2. The method of claim 1, comprising:

receiving a power network model update from the first substation, the power network model update corresponding to a power grid event within a first power grid territory monitored by the first substation; and

updating the global power network model based upon the power network model update.

3. The method of claim 1, comprising:

detecting a power network model change within the power grid; and

sending a power network model update corresponding to the power network model change to the first substation.

4. The method of claim 3, comprising:

notifying the first substation to update the first local power network model based upon the power network model update.

5. The method of claim 1, the first substation configured to execute a local grid management application based upon the first local power network model, the local grid management application comprising at least one of a fault detection isolation restoration application (FDIR), a network reconfiguration application, a voltage and var control application, a demand response control application, and a power generation compensation application.

6. The method of claim 1, comprising:

distributing the execution of the one or more grid management applications between the network control center and the one or more substations.

7. The method of claim 6, comprising:

assigning execution priority to a local grid management application hosted by a substation over a grid management application hosted by the network control center.

8. The method of claim 1, comprising:

receiving a power network model update from the first substation, the power network model update corresponding to a power grid event within a first power grid territory monitored by the first substation;

evaluating the power grid event associated with the power network model update against the global power network model; and

responsive to a determination that corrective action is to be taken based upon the evaluation, issuing a control command defining the corrective action to one or more substations.

9. A method for maintaining a distributed electrical power network model within a power grid, comprising:

maintaining, at a first substation, a first local power network model received from a network control center configured to manage one or more substations associated with a power grid, the first local power network model comprising a local logical representation of the power grid associated with the first substation, the first local power network model based upon at least some of a global power network model maintained by the network control center.

10. The method of claim 9, comprising:

detecting, by the first substation, a power network model change corresponding to a power grid event within a first power grid territory monitored by the first substation; and

updating the first local power network model based upon the power network model change.

11. The method of claim 10, comprising:

identifying one or more peer substations that are peers of the first substation.

12. The method of claim 11, comprising:

sending a power network model update corresponding to the power network model change to the one or more peer substations; and

instructing the one or more peer substations to update local power network models, maintained at respective peer substations, based upon the power network model update.

13. The method of claim 10, comprising:

sending a power network model update corresponding to the power network model change to the network control center; and

instructing the network control center to update the global power network model based upon the power network model update.

14. The method of claim 9, comprising:

receiving a power network model update from the network control center, the power network model update corresponding to a power network model change within the power grid detected by the network control center; and

updating the first local power network model based upon the power network model update.

15. The method of claim 14, comprising:

sending a notification of the power network model update to one or more peer substations.

16. The method of claim 9, comprising:

receiving a power network model update from a second substation, the power network model update corresponding to a power grid event within a second power grid territory monitored by the second substation; and

updating the first local power network model based upon the power network model update.

17. The method of claim 11, the detecting a power network model change, comprising:

obtaining power grid measurement data from an intelligent electric device feeder (IED feeder) indicating a state change within the first power grid territory.

18. The method of claim 10, comprising:

sending a power network model update corresponding to the power network model change to the network control center;

receiving a notification from the network control center that corrective action is to be taken based upon an evaluation of the power grid event associated with the power network model update against the global power network model by the network control center.

19. A system for maintaining a distributed electrical power network model associated with a power grid, comprising:

a network model management component configured to;

maintain a global power network model at a network control center configured to manage one or more substations associated with a power grid, the global power network model comprising a global logical representation of the power grid; and

maintain a first local power network model at a first substation, the first local power network model comprising a local logical representation of the power grid associated with the first substation, the first local power network model based upon at least some of the global power network model.

20. The system of claim 19, the network model management component configured to at least one of:

update the global power network model based upon a first power network model update received from the first substation, the first power network model update identifying a power grid event within a first power grid territory monitored by the first substation; and

send a second power network model update to the first substation based upon a detected power network model change within the power grid, the second power network model update comprising a notification for the first substation to update the first local power network model based upon the second power network model update.