Evaluation of the Polarized MHO Digital Distance Relay using Polarization Signals

This article describes the implementation and analysis of a digital distance relay Polarized MHO with various forms of polarizations.Therefore, their behavior was found for various fault types at certain points in the transmission line: a little ahead of the relay, behind the relay (considering a reverse fault), busbar, and far ahead of the busbar (inside the zone 1 protection).It is also investigated its resistive reach for many fault resistance values, and the change of its operating characteristic for the various fault points on the line, verifying the circle displacement Polarized MHO, dynamically modified under the influence of conditions and fault of polarization voltages used.The simulations were implemented through the MATLAB software, and the behavior was observed in the form of R-X diagrams from data generated by ATP®, using the graphical tool ATP-DRAW®.