Fault location using traveling waves

摘要

The present disclosure relates to calculating a fault location in an electric power transmission system based on traveling waves. In one embodiment, a system consistent with the present disclosure may be configured to detect a fault in an electric power transmission system. The system may include a traveling wave detection subsystem configured to detect and measure traveling waves on a transmission line and a fault location estimation subsystem. The fault location estimation subsystem may receive from the traveling wave detection subsystem a first plurality of traveling waves on the transmission line generated during a reference event. The fault location estimation subsystem may receive from the traveling wave detection subsystem a second plurality of traveling waves generated during an unplanned event. An unmatched traveling wave in the second plurality of waves may be detected and a location of the unplanned event based on the unmatched traveling wave.

主权项

1. A system configured to detect a fault in an electric power transmission system, the system comprising:
a traveling wave detection subsystem configured to detect and measure traveling waves on a transmission line of the electric power transmission system; a fault location estimation subsystem configured to:
receive from the traveling wave detection subsystem a first plurality of traveling waves on the transmission line generated during a reference event;receive from the traveling wave detection subsystem a second plurality of traveling waves generated during the fault, the second plurality of traveling waves generated by the fault;identify a plurality of matched traveling waves in the first plurality of traveling waves and the second plurality of traveling waves;align the first plurality of traveling waves and the second plurality of traveling waves based on the plurality of matched traveling waves;identify an unmatched traveling wave in the second plurality of waves and a time of the unmatched traveling wave;determine a location of the fault on the transmission line based on the unmatched traveling wave, the time of the unmatched traveling wave and the propagation velocity of the unmatched traveling wave on the transmission line; and an interface configured issue a command to trip a breaker to clear the fault.