The Effect of Fault Resistance on Distance Relaying Application
Keywords:Protection, Distance relay, under reach, Fault resistance, Line impedance, Mho relay.
The design and behavior of distance relay used for
the protection of long transmission line is described in this paper.
The relay was simulated using the model language in MATLAB.
The operating behavior of the relay was assessed using two
different simulated networks with both solid and resistive faults.
The data generated by MATLAB SIMULINK describes the
voltage and current signals at the relay location both immediately
before and during the fault. The data is applied to the relay
simulator, which than evaluates whether the impedance
trajectory of the fault enters one or more of the operating zones.
The results are presented in graphical form using an R-X