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This paper presents a new impedance based fault location method in the case of single phase to earth faults. This method utilized the measured impedance by distance relay and super imposed current factor, which is the ratio of post-fault current to super imposed current, to discriminate the fault position on the line. This method is robust against the fault resistance. The presented method only uses...
This paper presents an accurate algorithm for locating faults on a series-compensated line. It applies two-end currents and one-end voltage and thus can be applied with current differential protective relays. The algorithm applies two subroutines and the procedure for selecting the valid subroutine. The algorithm has been evaluated using the fault data of ATP-EMTP versatile simulations of faults on...
Based on the ratio between the sum of two terminals voltages phasor of the transmission line and the sum of two terminals currents phasor of the same line, which is defined as integrated impedance in this paper, a new ultra high voltage (UHV) transmission line pilot protection principle is proposed. When an outer fault occurs, the integrated impedance reflect the capacitance impedance of the line,...
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