# US 9,519,301 B2 · Contingency-based load shedding > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,519,301 B2 - Document ID: US9519301B2 - Status: Granted - Kind: B2 - Application number: 14/190,858 - Filed: 2014-02-26 - Published: 2015-08-27 - Granted: 2016-12-13 - Earliest claimed: 2014-02-26 - Assignees: Schweitzer Engineering Laboratories, Inc. - Applicants: Schweitzer Engineering Laboratories, Inc. - Inventors: Jedidiah W. Bartlett; William F. Allen - Web page: https://patentgrep.com/patent/US9519301B2 ## CPC - G05F 1/66: Regulating electric power - G05F: SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES ## Abstract Disclosed herein are a variety of systems and methods for management of an electric power generation and distribution system. According to various embodiments, a system consistent with the present disclosure may be configured to analyze a data set comprising a plurality of generator performance characteristics of a generator at a plurality of operating conditions. The performance characteristics may be used to produce a generator capability model. The generator capability model may comprise a mathematical representation approximating the generator performance characteristics at the plurality of operating conditions. The system may further produce an estimated generator capacity at a modeled condition that is distinct from the generator performance characteristics of the data set and is based upon the generator capability model and may implement a control action based on the estimated generator capacity at the modeled condition. ## Claims ### Claim 1 A system for contingency-based load shedding in an electrical power distribution system, comprising: a data bus; a processor in communication with the data bus; and a non-transitory computer readable storage medium in communication with the data bus, the non-transitory computer readable storage medium storing information comprising: a data set comprising a priority list associating at least one priority with a plurality of loads connected to an electrical power distribution system; a power system monitoring module executable on the processor and configured to monitor the electrical power distribution system and detect a first contingency trigger associated with a first contingency; an event window module executable on the processor and configured to identify, within a contingency window following the first contingency: a first change in topology of the electric power distribution system specified by the first contingency, a second change in topology affecting at least one of a plurality of sources in electrical communication with the plurality of loads, and a contingency event associated with the first contingency; and a load shedding module executable on the processor and configured to selectively shed at least one of the plurality of loads based on the priority list based upon the identification of the first change in topology, the second change in topology, and the contingency event each occurring within the contingency window. ### Claim 2 (depends on 1) The system of claim 1, wherein the event window module is configured to monitor a plurality of status indicators associated with a plurality of electrical couplers in the electric power distribution system, and one of the first change in topology and the second change in topology corresponds to a change associated with at least one of the plurality of electrical couplers. ### Claim 3 (depends on 1) The system of claim 1, wherein the load shedding module is further configured to selectively shed loads based on the priority list until a stabilizing condition is satisfied. ### Claim 4 (depends on 3) The system of claim 3, wherein the load shedding module is further configured to implement a delay period following the shedding of each load prior to evaluation of the stabilizing condition. ### Claim 5 (depends on 1) The system of claim 1, wherein the first contingency trigger comprises a reserve margin falling below a specified threshold. ### Claim 6 (depends on 5) The system of claim 5, wherein the power system monitoring module is further configured to selectively evaluate an incremental reserve margin at a plurality of points throughout the electric power distribution system and to establish the first contingency trigger based on one of the incremental reserve margin at any of the plurality of points. ### Claim 7 (depends on 1) The system of claim 1, wherein the first change in topology, the second change in topology, and the contingency event rely on independently derived information relating to the electric power distribution system. ### Claim 8 (depends on 1) The system of claim 1, wherein the second change in topology results in at least one source of the plurality of sources being associated with a different electrical island following the second change in topology. ### Claim 9 (depends on 1) The system of claim 1, wherein the priority list comprises a priority for each of a plurality of sheddable loads. ### Claim 10 (depends on 1) The system of claim 1, wherein the power system monitoring module is further configured to identify a second contingency trigger associated with a multiple contingency event, and the event window module is configured to identify any of a plurality of contingency events associated with the multiple contingency event. ### Claim 11 A method for contingency-based load shedding in an electrical power distribution system, comprising: providing a data set comprising a priority list associating a priority with a plurality of loads connected to the electrical power distribution system; monitoring the electrical power distribution system and detecting a first contingency trigger associated with a first contingency; identifying, within a contingency window following the first contingency: a first change in topology of the electric power distribution system specified by the first contingency a second change in topology affecting at least one of a plurality of sources in electrical communication with the plurality of loads; and a contingency event associated with the first contingency; and shedding at least one of the plurality of loads based on a priority list based upon the identification of the first change in topology, the second change in topology, and the contingency event each occurring within the contingency window. ### Claim 12 (depends on 11) The method of claim 11, further comprising: identifying one of the first change in topology and the second change in topology by monitoring a plurality of status indicators associated with a plurality of electrical couplers in the electric power distribution system, and the first change in topology corresponds to a change associated with at least one of the plurality of electrical couplers. ### Claim 13 (depends on 11) The method of claim 11, further comprising: shedding loads based on the priority list until a stabilizing condition is satisfied. ### Claim 14 (depends on 13) The method of claim 13, further comprising: implementing a delay period following the shedding of each load prior to evaluating the stabilizing condition. ### Claim 15 (depends on 11) The method of claim 11, wherein the first contingency trigger comprises one of a reserve margin falling below a specified threshold. ### Claim 16 (depends on 15) The method of claim 15, further comprising: evaluating a reserve margin at a plurality of points throughout the electric power distribution system; and establishing the first contingency trigger based on one of the reserve margin at any of the plurality of points. ### Claim 17 (depends on 11) The method of claim 11, wherein the first change in topology, the second change in topology, and the contingency event rely on independently derived information relating to the electric power distribution system. ### Claim 18 (depends on 11) The method of claim 11, wherein the second change in topology results in at least one source of the plurality of sources being associated with a different electrical island following the second change in topology. ### Claim 19 (depends on 11) The method of claim 11, wherein the priority list comprises a priority for each of a plurality of sheddable loads. ### Claim 20 (depends on 11) The method of claim 11, further comprising: identifying a second contingency trigger associated with a multiple contingency event; and identifying any of a plurality of contingency events associated with the multiple contingency event.