# US 9,520,717 B2 · Distributed electrical power network model maintenance > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,520,717 B2 - Document ID: US9520717B2 - Status: Granted - Kind: B2 - Application number: 13/450,043 - Filed: 2012-04-18 - Published: 2013-10-24 - Granted: 2016-12-13 - Earliest claimed: 2012-04-18 - Assignees: ABB Research Ltd. - Applicants: James Dimitrios Stoupis; Zhenyuan Wang - Inventors: James Dimitrios Stoupis; Zhenyuan Wang - Web page: https://patentgrep.com/patent/US9520717B2 ## CPC - H02J 3/00: Circuit arrangements for AC mains or AC distribution networks - H02J 2103/30: Simulating, planning, modelling, reliability check or computer assisted design [CAD] of electric power networks - Y02E 60/00: Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation - Y04S 40/20: Information technology specific aspects, e.g. CAD, simulation, modelling, system security - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y04S: SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS ## 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, is maintained at a network control center configured to manage one or more substations associated with the power grid. The network control center hosts grid management applications that 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, is maintained at the substation. The substation hosts one or more local grid management applications that utilize the local power network model. The global power network model and the local power network model are synchronized in response to events occurring within the power grid. ## Claims ### Claim 1 A method, 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; receiving, at the network control center, a first power network model update from a first substation of the power grid, the first power network model update corresponding to a first power grid event at least partially in a first power grid territory associated with the first substation, the first power grid event comprising a switch of one or more consumers from a first feeder to a second feeder; evaluating, by the network control center, the first power grid event to determine whether the first power grid event was a desirable course of action; and responsive to determining, by the network control center, that the first power grid event was not a desirable course of action: sending a first notification of a corrective action to the first substation, the first notification comprising a first instruction for the first substation to update a first local power network model, the first local power network model comprising a first local logical representation of the first power grid territory with which the first substation is associated, the first local power network model based upon at least some of the global power network model; and sending a second notification of the corrective action to a second substation of the power grid, the second notification comprising a second instruction for the second substation to update a second local power network model, the second local power network model comprising a second local logical representation of a second power grid territory with which the second substation is associated, the second local power network model based upon at least some of the global power network model, the corrective action corresponding to a second power grid event at least partially in the second power grid territory. ### Claim 2 (depends on 1) The method of claim 1, comprising: updating the global power network model based upon the corrective action. ### Claim 3 (depends on 1) The method of claim 1, the evaluating comprising determining whether the first power grid event is associated with an overload of the second feeder. ### Claim 4 (depends on 1) The method of claim 1, the second power grid event comprising a switch of at least one of the one or more consumers to a third feeder. ### Claim 5 (depends on 1) 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, or a power generation compensation application. ### Claim 6 (depends on 1) The method of claim 1, comprising: distributing execution of one or more grid management applications between the network control center and the one or more substations. ### Claim 7 (depends on 6) 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. ### Claim 8 (depends on 1) The method of claim 1, the first power grid territory at least one of partially overlapping or different than the second power grid territory. ### Claim 9 A method, comprising: maintaining, at a first substation of a power grid, a first local power network model, the first local power network model comprising a first local logical representation of a first power grid territory with which the first substation is associated, the first local power network model based upon at least some of a global power network model maintained by a network control center, the global power network model comprising a global logical representation of the power grid; updating the first local power network model based upon a first power grid event at least partially in the first power grid territory, the first power grid event comprising a switch of one or more consumers from a first feeder to a second feeder; sending, from the first substation, a first power network model update to the network control center, the first power network model update corresponding to the first power grid event; and receiving, at the first substation, a first notification of a corrective action from the network control center, the first notification comprising a first instruction for the first substation to update the first local power network model, the corrective action corresponding to a second power grid event at least partially in a second power grid territory with which a second substation of the power grid is associated. ### Claim 10 (depends on 9) The method of claim 9, the first power grid territory at least one of partially overlapping or different than the second power grid territory. ### Claim 11 (depends on 9) The method of claim 9, the second power grid event comprising a switch of at least one of the one or more consumers to a third feeder. ### Claim 12 (depends on 11) The method of claim 11, the first feeder and the second feeder in the first power grid territory and the third feeder in the second power grid territory. ### Claim 13 (depends on 9) The method of claim 9, comprising: sending a second power network model update corresponding to the first power grid event to the second substation prior to receiving the first notification. ### Claim 14 (depends on 9) The method of claim 9, comprising: receiving a second power network model update from the network control center; and updating the first local power network model based upon the second power network model update. ### Claim 15 (depends on 14) The method of claim 14, comprising: sending a notification of the second power network model update to the second substation. ### Claim 16 (depends on 9) The method of claim 9, comprising: receiving a second power network model update from the second substation; and updating the first local power network model based upon the second power network model update. ### Claim 17 (depends on 9) The method of claim 9, comprising: detecting the first power grid event by obtaining power grid measurement data from an intelligent electric device feeder (IED feeder) indicating a state change within the first power grid territory. ### Claim 18 (depends on 9) The method of claim 9, the second power grid event comprising a switch of at least one of the one or more consumers from the second feeder to a third feeder. ### Claim 19 A system, comprising: a processor; and memory comprising processor-executable instructions that when executed by the processor cause implementation of 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; receive a first power network model update from a first substation of the power grid, the first power network model update corresponding to a first power grid event at least partially in a first power grid territory associated with the first substation, the first power grid event comprising a switch of one or more consumers from a first feeder to a second feeder; evaluate the first power grid event to determine whether the first power grid event was a desirable course of action; and responsive to determining that the first power grid event was not a desirable course of action: send a first notification of a corrective action to the first substation, the first notification comprising a first instruction for the first substation to update a first local power network model, the first local power network model comprising a first local logical representation of the first power grid territory with which the first substation is associated, the first local power network model based upon at least some of the global power network model; and send a second notification of the corrective action to a second substation of the power grid, the second notification comprising a second instruction for the second substation to update a second local power network model, the second local power network model comprising a second local logical representation of a second power grid territory with which the second substation is associated, the second local power network model based upon at least some of the global power network model, the corrective action corresponding to a second power grid event at least partially in the second power grid territory. ### Claim 20 (depends on 19) The system of claim 19, the second power grid event comprising a switch of at least one of the one or more consumers from the second feeder to a third feeder.