Fault detection in electric power delivery systems using underreach, directional, and traveling wave elements

摘要

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.

主权项

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; anddetermine 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.