The flexible alternating current transmission systems (FACTS) have been widely used in\nmodern power systems. Because of the presence of the FACTS devices, distance relays in transmission\nlines may inaccurately locate fault locations. Therefore, it is significant to find a mechanism for\nlocating fault in transmission lines connected to FACTS in which a static var compensator (SVC) is\ninvestigated in this work. Based on the development of a phasor measurement unit (PMU) with global\npositioning system (GPS), this paper proposes a new method for calculating apparent impedance seen\nby the distance relay location while a short-circuit fault occurs in a transmission line connected the\nSVC to the midpoint of the line. According to the method, sampled voltage and current measurement\nat the relay and SVC locations are synchronized using PMUs and the synchronized measurements\nare then used to calculate a new apparent impedance and to locate the fault location in the line.\nThe method in this paper has the capability for fast calculation and it also has the robustness for\nidentifying different fault types in power systems. Matlab/Simulink software is applied to simulate\nthe study results and to evaluate the correctness of the modeling and effectiveness of the proposed\nmethod for locating fault in this paper.
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