Implementation of Identification of Voltage Sag Location in Distribution Network with Harmonic

This paper proposes in observing Root Mean Square (RMS) voltage magnitude and locating the voltage sag location by using the distance relay method at upstream and downstream regions. It is found that the voltage sag location of the monitor can be identified clearly by comparing the magnitude and angle of impedance before and after the voltage sag event. The monitor can obtain the necessary impedance data by applying the relay’s algorithm or using distance estimates for the relay at that location. The radial unit distribution system network was constructed using SIMULINK. A comparison from several research papers was made between the Radial unit system and the Ring unit distribution system to observe the impedance magnitude and angle value. Harmonic distortion also was observed in this paper.