Transmission line fault location for single-phase-to-earth fault onnon-direct-ground neutral system

摘要

A new method for locating single-phase-to-earth faults on thentransmission line of nondirect ground neutral power systems isnpresented. The method employs the faulted phase network andnzero-sequence network as the fault location models. It effectivelyneliminates the effect of load and fault resistance on the accuracy ofnfault location. The technique embodies an accurate location by measuringnonly one local end data. The method is used in a procedure that providesnthe automatic determination of faulted line and phase, rather thannrequires engineer to specify them. Simulation results have shown theneffectiveness of the algorithm under the condition of earth fault