An overview of digital fault location algorithms for power transmission lines using transient waveforms

Abstract A digital fault location algorithm for calculating the fault distance on a power transmission line can be designed using any of three approaches: the steady-state phasor approach, the differential equation approach and the travelling-wave approach. In this paper, the algorithms utilizing the differential equation and the travelling-wave approach are reviewed. The effect of various algorithms on the relay speed and accuracy is examined. The associated filtering techniques are discussed.

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