Determination of a Line with a Single-Phase Short Circuit in the Distribution Network Using the Method of Signal Input

A distribution network with a mode of small ground fault currents can provide high reliability of power, but with a single-phase ground closure, it is quite difficult to determine the damaged line. In distribution networks, most of the damage is single-phase ground closures. For the normal operation of the network, it is quite important to quickly and accurately determine the line with the ground fault. This article proposes a method for determining a damaged line based on the signal line. The dynamic selection of parameters and frequency of the signal supplied to the network, which is analyzed by this method in real time, is analyzed. The accuracy of signal conversion in the frequency region is improved by using the Fourier phase transformation. Considering the active energy consumption of the entered signal after damage as a criterion improves the accuracy of the line determination. Theoretical analysis has shown that the damaged line can be determined quite accurately.