Time-domain distance line protection of electric power delivery systems
First Claim
1. A system configured to detect a fault in an electric power delivery system, comprising:
- a data acquisition subsystem configured to acquire a plurality of time-domain representations of electrical conditions in the electric power delivery system at each of a first terminal and a second terminal;
an incremental quantities subsystem configured to;
calculate a plurality of values of an operating quantity based on the plurality of time-domain representations of electrical conditions;
calculate a plurality of values of a restraining quantity based on the plurality of time-domain representations of electrical conditions;
determine an interval during which the calculated operating quantity exceeds the calculated restraining quantity;
a fault detector subsystem configured to declare a fault based on the calculated operating quantity exceeding the calculated restraining quantity by a security margin;
a protective action subsystem configured to implement a protective action on the electric power delivery system based on the declaration of the fault.
1 Assignment
0 Petitions
Accused Products
Abstract
The present disclosure relates to detection of faults in an electric power system. In one embodiment, an incremental quantities subsystem may be configured to calculate a plurality of values of an operating quantity based on the plurality of time-domain representations of electrical conditions. The incremental quantities subsystem may also calculate a plurality of values of a restraining quantity based on the plurality of time-domain representations of electrical conditions. An interval during which the calculated operating quantity exceeds the calculated restraining quantity may be determined. A fault detector subsystem may be configured to declare a fault based on the calculated operating quantity exceeding the calculated restraining quantity by a security margin. A protective action subsystem configured to implement a protective action based on the declaration of the fault.
-
Citations
19 Claims
-
1. A system configured to detect a fault in an electric power delivery system, comprising:
-
a data acquisition subsystem configured to acquire a plurality of time-domain representations of electrical conditions in the electric power delivery system at each of a first terminal and a second terminal; an incremental quantities subsystem configured to; calculate a plurality of values of an operating quantity based on the plurality of time-domain representations of electrical conditions; calculate a plurality of values of a restraining quantity based on the plurality of time-domain representations of electrical conditions; determine an interval during which the calculated operating quantity exceeds the calculated restraining quantity; a fault detector subsystem configured to declare a fault based on the calculated operating quantity exceeding the calculated restraining quantity by a security margin; a protective action subsystem configured to implement a protective action on the electric power delivery system based on the declaration of the fault. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for detecting a fault in an electric power delivery system, comprising:
-
acquiring a plurality of time-domain representations of electrical conditions in the electric power delivery system at each of a first terminal and a second terminal; calculating a plurality of values of an operating quantity based on the plurality of time-domain representations of electrical conditions; determining a plurality of values of a restraining quantity based on the plurality of time-domain representations of electrical conditions; determining an interval during which the calculated operating quantity exceeds the calculated restraining quantity; declaring a fault based on the calculated operating quantity exceeding the calculated restraining quantity by a security margin; and implementing a protective action on the electric power delivery system based on the declaration of the fault. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
-
Specification