Abstract

There are a lot of methods for fault location using synchronized phasor measurement. Most of these methods are based on using measured voltage and current in one or two ends of a transmission line. Current measurement accuracy is limited according to the used current transformer’s (CT) accuracy. In this paper, besides various methods of fault distance location detection in power transmission lines, a new method based on the current Tran’s removal and use of the voltage sampling by network impedance matrix method is described. This fault distance location detection method is sufficiently accurate and precise fault location is calculated with minimum error difference. At first, relations to calculate the fault location of this method are proved. Then the location of the single phase to ground and phase-phase fault of the network to ground is detected using the electromagnetic transient program (EMTP) software in two cases: First regarding the capacity of the lines’ capacitors and then regardless of that. This simulation method can determine the fault location online and with the minimum time.

Key words: Fault locator, Synchronized phasor measurement, Fault analysis, impedance matrix, EMTP.

Abbreviation

CT, Current transformer; EMTP, electromagnetic transient program.