Performance evaluation of two type of numerical distance relays under fault transients

Abstract EN

In this paper one considers a numerical distance protection based on the dialogue of two protections using the numerical technology of relay 7SA612 and REL316*4, which constitutes a powerful means in term of speed and of selectivity for the elimination of the lines and bars faults in connecting stations, it can also ensure a " distant " help under good conditions.

This will make it possible to have permanently two protections of numerical distance to supervise the decentralized production connected through a HV line.

Some simulation results are given to confirm that.