Electrical fault location determination in a distribution system based on phasor information

Patent metadata

Field	Value
Publication number	US-10401417-B2
Application number	US-201414158108-A
Country	US
Kind code	B2
Filing date	Jan 17, 2014
Priority date	Feb 13, 2013
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

Determination of information relating to a location of an electrical fault in an electrical energy distribution system based on phasor information is disclosed. A component can receive phasor information and electrical energy distribution system information. The system can determine a distance factor based on the phasor information. The distance factor can be employed to determine fault location information. A set of fault location information can be generated. Fault location information can be corrected for fault characteristics. Equivalent circuit models can be employed in determining the distance factor. Fault locations can be validated to facilitate generating subset of fault location information. Access to fault location information can be facilitated.

First claim

What is claimed is:

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:
receiving phasor information related to determining a location of a fault in an electrical energy distribution system comprising multiple energy distribution branches, wherein the phasor information comprises a time synchronized measurement of an electrical characteristic of the electrical energy distribution system at a time by a single first phasor measurement unit device, and wherein the fault comprises a phase-to-ground fault;
receiving electrical distribution system information related to the electrical energy distribution system, wherein the electrical distribution system information comprises a model of at least a portion of the electrical energy distribution system at the time;
determining fault location information based on the phasor information and the electrical distribution system information, wherein the fault location information comprises one or more potential fault locations on one or more branches of the multiple energy distribution branches;
selecting at least one likely fault location from the one or more potential fault locations of the fault location information based on subsequent phasor information received after the receiving of the phasor information and received from a single second phasor measurement unit device, wherein the likely fault location is more likely to correspond to the fault than another fault location of the one or more potential fault locations; and
initiating dispatch of a repair resource in response to the fault in the electrical energy distribution system based on the at least one likely fault location, wherein the dispatch of the repair resource results in a repair of the fault in the electrical energy distribution system.

2. The system of claim 1 , wherein the determining the at least one likely fault location is performed at an energy management system device related to management or control of the electrical energy distribution system.

3. The system of claim 1 , wherein the determining the at least one likely fault location is performed at a mobile device.

4. The system of claim 3 , wherein the receiving the phasor information is via an interface of the mobile device in communication with an energy management system.

5. The system of claim 3 , wherein the receiving the phasor information is via an interface of the mobile device in communication with the single first phasor measurement unit device of the electrical energy distribution system.

6. The system of claim 3 , wherein the subsequent phasor information is received from the single second phasor measurement unit device via the interface of the mobile device.

7. The system of claim 1 , wherein the operations further comprise determining a distance factor related to a distance of the at least one likely fault location from a node device of the electrical energy distribution system.

8. The system of claim 7 , wherein the operations further comprise determining a candidate fault set based on the distance factor, wherein the candidate fault set comprises the at least one likely fault location.

9. The system of claim 8 , wherein the operations further comprise determining a subset of the candidate fault set based on the at least one likely fault location satisfying a condition related to the fault.

10. The system of claim 1 , wherein the operations further comprise modifying the fault location information based on an electrical characteristic of the fault.

11. The system of claim 10 , wherein the modifying the fault location information is performed iteratively and comprises satisfying a condition related to a determined threshold value.

12. The system of claim 10 , wherein the modifying the fault location information comprises modifying the fault location information using a non-linear equation.

13. A method, comprising:
receiving, by a device comprising a processor, first phasor information from a single first phasor measurement unit device in response to detecting a fault event for an electrical energy distribution system, wherein the fault event comprises a fault that is a phase-to-ground fault;
receiving, by the device, electrical distribution system information comprising parameters related to the electrical energy distribution system comprising at least two different energy distribution pathways;
determining, by the device, fault location information comprising at least one possible fault location on at least one of the at least two different energy distribution pathways based on the phasor information and the electrical distribution system information;
determining a probable fault location from the at least one possible fault location of the fault location information based on second phasor information from a single second phasor measurement unit device, wherein the probable fault location is more likely to be a true fault location than another possible fault location of the at least one probable fault location; and
initiating deployment of repair resources that cause a repair to the fault in response to the fault event of the electrical energy distribution system based on the probable fault location comprised in the fault location information.

14. The method of claim 13 , wherein the receiving the first phasor information comprises receiving time synchronized polyphasic voltage information.

15. The method of claim 13 , wherein the receiving the electrical distribution system information comprises receiving a model of the electrical characteristics of the electrical energy distribution system.

16. The method of claim 15 , wherein the model comprises a circuit model representing a portion of the electrical energy distribution system.

17. The method of claim 16 , wherein the circuit model is a Thevenin equivalent circuit model of the portion of the electrical energy distribution system.

18. The method of claim 13 , wherein the device is a mobile device.

19. The method of claim 13 , wherein an energy management system, related to management or control of the electrical energy distribution system, comprises the device.

20. A computer readable storage device comprising executable instructions that, in response to execution, cause a device comprising a processor to perform operations, comprising:
receiving first phasor information related to determining a first candidate location of a fault on a first energy distribution path in an electrical energy distribution system comprising at least a second energy distribution path that is a different path than the first energy distribution path, wherein the first phasor information is for a determined time from a first phasor measurement unit device, wherein the fault comprises an unintended phase-to-ground electrical pathway;
receiving second phasor information related to determining a second candidate location of the fault in the electrical energy distribution system, wherein the second phasor information is for the determined time from a second phasor measurement unit device;
receiving electrical distribution system information related the electrical energy distribution system, wherein the electrical distribution system information comprises a model of at least a portion of the electrical energy distribution system for the determined time;
determining a fault location information set comprising fault information related to the fault based o

Assignees

• General Electric Technology Gmbh

Inventors

• Ren Jinfeng
• Venkata Subrahmanyam Saraswati

Classifications

• H02H3/405

  using phase sequence analysing arrangements · CPC title

• H02H3/40

  responsive to ratio of voltage and current · CPC title

• G01R31/088

  Aspects of digital computing · CPC title

• G01R31/086 Primary

  in power transmission or distribution networks, i.e. with interconnected conductors · CPC title

• G01R19/2513

  Arrangements for monitoring electric power systems, e.g. power lines or loads; Logging · CPC title