Fault detection in electric power delivery systems using underreach, directional, and traveling wave elements
First Claim
1. A system configured to detect a fault in an electric power delivery system, comprising:
- a data acquisition subsystem configured to receive a plurality of representations of electrical conditions associated with at least a portion of the electric power delivery system;
a traveling wave differential subsystem configured to;
determine an operating quantity based on the plurality of representations of electrical conditions associated with the at least a portion of the electric power delivery system;
determine a restraint quantity based on the plurality of representations of electrical conditions associated with the at least a portion of the electric power delivery system;
detect a traveling wave generated by the fault based on the plurality of representations of electrical conditions associated with the at least a portion of the electric power delivery system;
a directional subsystem configured to;
determine a direction of the fault based on a polarity of the traveling wave; and
determine that the fault falls within a zone of protection based on the direction of the fault;
a fault detector subsystem configured to declare a fault based on a comparison of the operating quantity and the restraint quantity; and
a protective action subsystem configured to implement a protective action based on the declaration of the fault.
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Accused Products
Abstract
The present disclosure pertains to systems and methods for detecting faults in an electric power delivery system. In one embodiment, a system may include a data acquisition subsystem configured to receive a plurality of representations of electrical conditions. The system may also include a traveling wave differential subsystem configured to determine an operating quantity based on the plurality of representations of electrical conditions. The traveling wave differential subsystem may also determine a restraint quantity based on the plurality of representations of electrical conditions. The traveling wave differential subsystem may detect a traveling wave generated by the fault based on the plurality of representations. A fault detector subsystem may be configured to declare a fault based on a comparison of the operating quantity and the restraint quantity. A protective action subsystem may implement a protective action based on the declaration of the fault.
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Citations
24 Claims
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1. A system configured to detect a fault in an electric power delivery system, comprising:
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a data acquisition subsystem configured to receive a plurality of representations of electrical conditions associated with at least a portion of the electric power delivery system; a traveling wave differential subsystem configured to; determine an operating quantity based on the plurality of representations of electrical conditions associated with the at least a portion of the electric power delivery system; determine a restraint quantity based on the plurality of representations of electrical conditions associated with the at least a portion of the electric power delivery system; detect a traveling wave generated by the fault based on the plurality of representations of electrical conditions associated with the at least a portion of the electric power delivery system; a directional subsystem configured to; determine a direction of the fault based on a polarity of the traveling wave; and determine that the fault falls within a zone of protection based on the direction of the fault; a fault detector subsystem configured to declare a fault based on a comparison of the operating quantity and the restraint quantity; and a protective action subsystem configured to implement a protective action based on the declaration of the fault. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for detecting a fault in an electric power delivery system, comprising:
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receiving a plurality of representations of electrical conditions associated with at least a portion of the electric power delivery system; determining an operating quantity based on the plurality of representations of electrical conditions associated with the at least a portion of the electric power delivery system; determining a restraint quantity based on the plurality of representations of electrical conditions associated with the at least a portion of the electric power delivery system; detecting a traveling wave generated by the fault based on the plurality of representations of electrical conditions associated with the at least a portion of the electric power delivery system; determining a direction of the fault based on a polarity of the traveling wave; determining based on the direction of the fault that the fault falls within a zone of protection; declaring a fault based on a comparison of the operating quantity and the restraint quantity; and implementing a protective action based on the declaration of the fault. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A system configured to detect a fault in an electric power delivery system, comprising:
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a data acquisition subsystem configured to receive a plurality of representations of electrical conditions associated with at least a portion of the electric power delivery system; a traveling wave differential subsystem configured to; determine an operating quantity based on the plurality of representations of electrical conditions associated with the at least a portion of the electric power delivery system; determine a restraint quantity based on the plurality of representations of electrical conditions associated with the at least a portion of the electric power delivery system by determining a passing through traveling wave traversing from a first end of the electric power delivery system to a second end of the electric power delivery system; detect a traveling wave generated by the fault based on the plurality of representations of electrical conditions associated with the at least a portion of the electric power delivery system; a fault detector subsystem configured to declare a fault based on a comparison of the operating quantity and the restraint quantity; and a protective action subsystem configured to implement a protective action based on the declaration of the fault.
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24. A method for detecting a fault in an electric power delivery system, comprising:
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receiving a plurality of representations of electrical conditions associated with at least a portion of the electric power delivery system; determining an operating quantity based on the plurality of representations of electrical conditions associated with the at least a portion of the electric power delivery system; determining a restraint quantity based on the plurality of representations of electrical conditions associated with the at least a portion of the electric power delivery system by determining a passing through traveling wave traversing from a first end of the electric power delivery system to a second end of the electric power delivery system; detecting a traveling wave generated by the fault based on the plurality of representations of electrical conditions associated with the at least a portion of the electric power delivery system; declaring a fault based on a comparison of the operating quantity and the restraint quantity; and implementing a protective action based on the declaration of the fault.
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Specification