Distribution of symmetrical current components along 10 kv cable line with isolated neutral at single-phase fault in the medium part of the line

Abstract

In the work is investigated the distribution of the values of the symmetrical components of capacitive currents along a 10 kV cable line with in insulated neutral mode during a single-phase ground fault in the middle part of the line. The patterns of changes of real phase currents and their symmetrical components along the line during a single-phase to ground fault are described. The distribution of currents along the length in the presence of parallel lines, one of which is damaged, has been studied. A digital model of the line and supply transformer was used, which allows obtaining results taking into account many factors that are difficult to consider in analytical form.