Fault location in electric power delivery systems
First Claim
Patent Images
1. A system for determining a location of a fault in a radial electric power delivery system with at least two branches, comprising:
- a first device in electrical communication with the radial electric power delivery system for obtaining power system voltage and current information therefrom and determining whether a fault condition exists thereon; and
,a fault locator in communication with the first device, including;
a receive module for receiving;
an indication from the first device of a phase-to-phase fault condition on the radial electric power delivery system; and
,radial electric power delivery system data including the voltage and current information or a value calculated therefrom from the first device;
a fault location determination module for determining possible fault locations and creating a list of the possible fault locations using;
the radial electric power delivery system data from the first device;
physical parameters of the radial electric power delivery system; and
,a calculated reactance to the fault calculated without using positive-sequence current.
2 Assignments
0 Petitions
Accused Products
Abstract
Accurately calculating location of a phase-to-phase fault even on a branched, non-homogenous, radial electric power distribution system. The calculation includes determining a calculated reactance to the fault without using positive-sequence current measurements, and uses the line parameters to determine locations on the system that match the calculated reactance to the fault. The calculation may further include a determination of faulted phase and eliminate fault location possibilities based on absence of the faulted phase at those locations.
-
Citations
22 Claims
-
1. A system for determining a location of a fault in a radial electric power delivery system with at least two branches, comprising:
-
a first device in electrical communication with the radial electric power delivery system for obtaining power system voltage and current information therefrom and determining whether a fault condition exists thereon; and
,a fault locator in communication with the first device, including; a receive module for receiving; an indication from the first device of a phase-to-phase fault condition on the radial electric power delivery system; and
,radial electric power delivery system data including the voltage and current information or a value calculated therefrom from the first device; a fault location determination module for determining possible fault locations and creating a list of the possible fault locations using; the radial electric power delivery system data from the first device; physical parameters of the radial electric power delivery system; and
,a calculated reactance to the fault calculated without using positive-sequence current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A method for determining a location of a fault having a fault type in an radial electric power delivery system, comprising a first intelligent electronic device in electrical communication with the radial electric power delivery system, the method comprising:
-
obtaining, at the first intelligent electronic device radial electric power delivery system voltage and current information from the radial electric power delivery system; determining, at the first intelligent electronic device a phase-to-phase fault condition on the radial electric power delivery system; communicating the phase-to-phase fault condition and radial electric power delivery system data including the voltage and current information or a value calculated therefrom from the first intelligent electronic device to a fault locator; determining using the fault locator a possible fault location on the radial electric power delivery system and creating, using the fault locator, a list of the possible fault locations using; the radial electric power delivery system data; physical parameters of the radial electric power delivery system; and
,a calculated reactance to the fault calculated without using positive-sequence current. - View Dependent Claims (18, 19, 20, 21, 22)
-
Specification