Assessment of fault location algorithms in transmission grids

The increased accuracy into the fault´s detection and location make an easier task for maintenance, this being the reason to develop new possibilities to a precise estimation of the fault location. The paper presents the results of the implementation of two fault location algorithms in ATP-EMTP program. Some ATP-MODELS modules were associated to the ATP model of different transmission grids, these modules being developed on basis of Takagi algorithm applied in two-machine systems and on basis of one algorithm processing synchronized positive-sequence phasor quantities on both transmission lines´ terminals. DFT and A3 type filters were used to calculate the fundamental frequency phasors of the transient voltages and currents. There are presented some simulations´, the considered parameters of the presented analysis being: line´s load, fault´s type and resistance and fault position along the overseen line.