Synchronized Measurements-Based Algorithm for Short Transmission Line Fault Analysis


A brand new numerical algorithm for the analysis of single line to ground faults on short overhead transmission lines is presented in this paper. It's based upon synchronized sampling at 2 line ports, and an correct fault model together with the arcing phenomena and tower footing resistance at the fault point. The core of the algorithm is an economical nonrecursive parameter estimation methodology. A dynamic arc model is included in the fault model to represent the arc’s interaction with the external power network. The algorithm accurately estimates the arc voltage amplitude, tower footing resistance, and therefore the fault location, simultaneously. The algorithm comes within the time domain, and is based on the synchronized acquisition of currents and voltages at each line terminals. Case studies primarily based on simulated information are presented to demonstrate the effectiveness of the new method. In explicit, the sensitivity of the proposed algorithm to synchronization errors, harmonics, line capacitance, and fault resistance were explored with lumped, distributed, transposed, and untransposed line models.

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