Faulted phase selection function based upon impedance comparison in a distance protection relay

Distance Protection Methodology for Detection of Faulted Phase and Fault Along With Power Swing Using Apparent Impedance

“…Takuya Utsumi et al [14] proposed a method to identify the faulted phases based on impedance comparison. It was observed that the apparent impedance measured is least for the faulted phases compared to the non-faulted phases.…”