Model of the arc earth-fault for medium voltage networks

Abstract

In this paper the universal model of dynamic short-circuit arcs is presented for simulation of earth-fault in medium voltage networks. The model describes the entire arc short-circuit process: the ignition, the burning stage, the arc extinction and the increasing recovery voltage. Four alternative choices of the characteristics of the static arc are implemented and compared. Simulation results in medium voltage networks are described. Realistic current and voltage time dependencies are obtained.