Angle-based management of a power grid system

• US 10,495,677 B2
• Filed: 05/03/2016
• Issued: 12/03/2019
• Est. Priority Date: 05/14/2015
• Status: Active Grant

• Current Assignee: General Electric Technology GmbH (GE Aerospace)
• Original Assignee: General Electric Technology GmbH (GE Aerospace)
• Inventors: Parashar, Manu, Jampala, Anil, Giri, Jay, Biswas, Saugata
• Primary Examiner(s): Gumedzoe, Peniel M
• Application Number:
  US15/145,385
• Publication Number:
  US 20160334447A1
• Time in Patent Office: 1,309 Days
• CPC Class Codes: G01R 21/133 by using digital technique
• CPC Class Codes: G01R 25/00 Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
• CPC Class Codes: G01R 31/40 Testing power supplies testing photovoltaic devices H02S50/10
• CPC Class Codes: G08B 21/18 Status alarms G08B21/02 takes precedence
• 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 13/00034 the elements or equipment being or involving an electric power substation
• CPC Class Codes: H02J 13/00036 the elements or equipment being or involving switches, relays or circuit breakers circuits for indication of single switches H01H9/167
• CPC Class Codes: H02J 2203/20 Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
• CPC Class Codes: H02J 3/381 Dispersed generators
• 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 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 10/18 using switches, relays or circuit breakers, e.g. intelligent electronic devices [IED]
• CPC Class Codes: Y04S 10/30 State monitoring, e.g. fault, temperature monitoring, insulator monitoring, corona discharge
• CPC Class Codes: Y04S 10/40 Display of information, e.g. of data or controls
• CPC Class Codes: Y04S 40/20 Information technology specific aspects, e.g. CAD, simulation, modelling, system security

Abstract

Energy flow in a power grid system (e.g., an electrical energy distribution system) is managed. In an example embodiment, a system provides for generating monitoring data for an electrical energy distribution system based on power-flow data for the electrical energy distribution system and topology data for the electrical energy distribution system. The power-flow data is indicative of voltage values that are repeatedly obtained from the electrical energy distribution system. The topology data is indicative of a topology for the electrical energy distribution system. The system also provides for identifying, based on the monitoring data, a change in a voltage angle associated with a transmission line in the electrical energy distribution system. Furthermore, the system provides for generating a notification for a graphical user interface in response to a determination that the change in the voltage angle for the transmission line satisfies a defined criterion.

Claims

1. A system, comprising:

a memory to store executable instructions; and

a processor coupled to the memory, that executes or facilitates execution of the executable instructions to perform operations, comprising;

generating monitoring data for an electrical energy distribution system that includes power-flow data for the electrical energy distribution system and topology data for the electrical energy distribution system, wherein the power-flow data is indicative of voltage values that are repeatedly obtained from the electrical energy distribution system, and wherein the topology data is indicative of topology information associated with an arrangement of devices in the electrical energy distribution system;

identifying, using the monitoring data that includes the power-flow data and the topology data associated with the arrangement of the devices in the electrical energy distribution system, change in a voltage angle associated with a transmission line in the electrical energy distribution system; and

wherein the change in the voltage angle is utilized to compute a sensitivity of voltage angle separation between a source region and a sink region of the electrical energy distribution system, the source region and sink region being coupled together by a transmission line, wherein the computed sensitivity is utilized to determine whether portions of the electrical energy distribution system including the source region and the sink region are under stress, and when the determination is made that one or more of the portions of the electrical energy distribution system are under stress, modifications to portions of the electrical energy distribution system are made, the modifications being effective to adjust power transmissions and energy flow in the electrical energy distribution system to alleviate the stress and to prevent power outages.

2. The system of claim 1, wherein the operations further comprise generating a notification for a graphical user interface in response to the determination that the change in the voltage angle for the transmission line satisfies a defined criterion.

3. The system of claim 2, wherein the identifying comprises identifying a rate of the change in the voltage angle using a set of defined voltage patterns for the transmission line.

4. The system of claim 1, wherein the identifying comprises identifying the change in the voltage angle associated with the transmission line using a power flow technique that analyzes power flow associated with the transmission line.

5. The system of claim 1, wherein the identifying comprises identifying, using the monitoring data that includes the power-flow data and the topology data, another change in another voltage angle for a device associated with the transmission line.

6. The system of claim 2, wherein the generating comprises modifying a portion of the graphical user interface in response to the determination that the change in the voltage angle for the transmission line satisfies the defined criterion.

7. The system of claim 1, wherein the operations further comprise generating information related to a set of actions for the modifying the portion of the electrical energy distribution system in response to the determination that the change in the voltage angle for the transmission line satisfies a defined criterion.

8. The system of claim 1, wherein the operations further comprise repeatedly obtaining the power-flow data from the electrical energy distribution system during an interval of time that is less than one second.

9. The system of claim 1, wherein the operations further comprise repeatedly obtaining the power-flow data from the electrical energy distribution system via a phasor measurement device communicatively coupled to the transmission line.

10. The system of claim 1, wherein the operations further comprise identifying, using the change in the voltage angle for the transmission line, a power outage associated with the electrical energy distribution system.

11. The system of claim 1, wherein the operations further comprise detecting congestion associated with the electrical energy distribution system in response to a determination, using the change in the voltage angle, that an amount of a power supply to a device associated with the transmission line is below a defined threshold level.

12. A method, comprising:

generating, by a system comprising a processor, topology data that is indicative of an arrangement and a power status of devices in an electrical energy distribution system;

generating, by the system, power-flow data that is indicative of voltage parameters associated with the electrical energy distribution system;

identifying, by the system and using the power-flow data and the topology data indicative of the arrangement and the power status of the devices in the electrical energy distribution system, a change in a voltage angle associated with a transmission line coupled between a first location and a second location in the electrical energy distribution system; and

wherein the change in the voltage angle is utilized to compute a sensitivity of voltage angle separation between the first region and the second region of the electrical energy distribution system, the first region and second region being coupled together by a transmission line, wherein the computed sensitivity is utilized to determine whether portions of the electrical energy distribution system including the first region and the second region are under stress, and when the determination is made that one or more of the portions of the electrical energy distribution system are under stress, modifications to portions of the electrical energy distribution system are made, the modifications being effective to adjust power transmissions and energy flow in the electrical energy distribution system to alleviate the stress and to prevent power outages.

13. The method of claim 12, wherein the identifying comprises identifying a rate of the change in the voltage angle during an interval of time.

14. The method of claim 12, wherein the generating the power-flow data comprises repeatedly obtaining the power-flow data from the electrical energy distribution system during an interval of time.

15. The method of claim 12, wherein the generating the power-flow data comprises repeatedly obtaining the power-flow data from the electrical energy distribution system via a phasor measurement device communicatively coupled to the transmission line.

16. The method of claim 12, further comprising:

displaying, by the system, information related to a set of actions for the altering in response to the determination that the change in the voltage angle for the transmission line satisfies a defined criterion.

17. The method of claim 12, further comprising:

displaying, by the system, information related to a power outage in the electrical energy distribution system in response to the determination that the change in the voltage angle for the transmission line satisfies a defined criterion.

18. A non-transitory computer readable storage device comprising executable instructions that, in response to execution, cause a device comprising a processor to perform operations, comprising:

obtaining topology data that is indicative of a topology calculation for an arrangement of devices in a power grid system;

repeatedly obtaining power-flow data during a period of time, the power-flow data being indicative of voltage parameters associated with the power grid system;

identifying, using the power-flow data and the topology data indicative of the topology calculation for the arrangement of the devices in the power grid system, a change in a voltage angle associated with a transmission line in the power grid system; and

wherein the change in the voltage angle is utilized to compute a sensitivity of voltage angle separation between a source region and a sink region of the electrical energy distribution system, the source region and sink region being coupled together by a transmission line, wherein the computed sensitivity is utilized to determine whether portions of the electrical energy distribution system including the source region and the sink region are under stress, and when the determination is made that one or more of the portions of the electrical energy distribution system are under stress, modifications to portions of the electrical energy distribution system are made, the modifications being effective to adjust power transmissions and energy flow in the electrical energy distribution system to alleviate the stress and to prevent power outages.

19. The non-transitory computer readable storage device of claim 18, wherein the identifying comprises identifying a rate of the change in the voltage angle during another period of time.

20. The non-transitory computer readable storage device of claim 18, wherein the identifying comprises identifying a rate of the change in the voltage angle based on a set of defined voltage patterns for the power grid system.