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Transmission line fault location for phase-to-earth fault using one-terminal data

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4 Author(s)
Zhang, Q. ; Dept. of Electr. Power & Autom., Tianjin Univ., China ; Zhang, Y. ; Song, W. ; Yu, Y.

An accurate algorithm for the fault location of a single phase-to-earth fault on a two-parallel power transmission line is presented. The faulted phase circuit and the zero-sequence circuit of the two-parallel line are used as a fault location model, in which the source impedance of the remote end is not involved. The algorithm effectively eliminates the effect of load flow and fault resistance on the accuracy of fault location. It embodies an accurate fault location by measuring only local data and is used in a procedure that provides the automatic determination of faulted types and phases, rather than requiring an engineer to specify them. Simulation results have demonstrated the validity of the algorithm under the condition of a phase-to-earth fault

Published in:

Generation, Transmission and Distribution, IEE Proceedings-  (Volume:146 ,  Issue: 2 )