New Method for Locating Transmission Line Ground Faults

The current ratio method has yielded good results for ground fault location, however, it is dependent on current readings from both ends of a 2-terminal transmission line. The proposed method is operable from current data, namely, the phase and residual currents, from a single terminal. A distinctive ratio curve is obtained for circuits containing series capacitors, and the method provides a means for locating ground faults on 3-terminal circuits.