TIME-DOMAIN DIRECTIONAL LINE PROTECTION OF ELECTRIC POWER DELIVERY SYSTEMS

摘要

The present disclosure relates to detection of faults in an electric power system. In one embodiment, an incremental quantities subsystem is configured to determine a forward torque, an operating torque, and a reverse torque based on the plurality of time-domain representations of electrical conditions. Each of the forward torque, the operating torque, and the reverse torque may be integrated over an interval. A fault detection subsystem may determine an occurrence of the fault based on a comparison of the operating torque to the forward torque and the reverse torque. Further, a direction of the fault may be determined based on the comparison of the forward torque, the operating torque, and the reverse torque. A fault may be declared based on the comparison and the direction. 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 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:
determine a forward torque, an operating torque, and a reverse torque based on the plurality of time-domain representations of electrical conditions;integrate each of the forward torque, the operating torque, and the reverse torque over an interval; a fault detection subsystem configured to:
determine an occurrence of the fault based on a comparison of the operating torque to the forward torque and the reverse torque;determine a direction of the fault based on the comparison of the forward torque, the operating torque, and the reverse torque;declare a fault based on the comparison and the direction; and a protective action subsystem configured to implement a protective action based on the declaration of the fault.