TRANSMISSION LINE PROTECTION USING TRAVELING WAVES IN OPTICAL GROUND WIRE FIBER

摘要

Disclosed herein are systems for detecting a location of a fault on an electric power transmission line using a state of polarization traveling wave in an optical ground wire. Various embodiments may also detect a traveling wave on a conductor of the transmission system. The arrival times of the state of polarization traveling wave and the electrical traveling wave may be compared. Using the difference in times and the known propagation velocities of the traveling waves a distance to the fault may be calculated. Arrival time of the state of polarization traveling wave may be calculated using electrical signals from photodetectors in an optical channel with polarizing filters at different orientations or reference frames.