Fault location in three-terminal line with use of limited measurements

Abstract

Limited availability of measurements, i.e. one-end measurements with additional information on amplitudes of load currents from the remote sections, for locating faults on three- terminal power line is considered. The delivered fault location algorithm consists of three subroutines designated for locating faults in particular sections of the line. In case of the subroutines for the sections, which are not adjacent to the main measurement terminal, the analytic shift of measurements to the tap point is applied. Special selection procedure is used for indication of the valid subroutine. The delivered fault location technique has been tested with the fault data obtained from versatile ATP-EMTP simulations. The sample examples are reported and discussed.