Transient-Based Fault-Location Method for Multiterminal Lines Employing S-Transform

In this paper, a novel method for fault location in multiterminal transmission lines is presented. The method is based on applying the S-transform to the modal components of synchronized measured currents at different terminals to extract time of arrival of the first arrived transient wave generated by the fault. These arrival times are then reported to a central processor where they are converted to distance indices and involved in a decision procedure. The simulation results have shown good performance of the proposed method under different fault resistances, fault inception angles, fault locations (even on tap points), fault types, and faulted sections.