VOLTAGE BASED METHOD FOR FAULT IDENTIFICATION IN A TRANSMISSION LINE AND APPARATUS THEREOF

摘要

A voltage based method for fault identification in a transmission line and an apparatus thereof. The method comprises the following steps: measuring real-time values of currents and voltages of unbroken healthy phase conductors in the transmission line when a single-phase fault occurs; respectively calculating an inductive voltage and a capacitive coupling voltage according to the measured currents and voltages (304); comparing the capacitive coupling voltage with the inductive voltage multiplied by a factor, wherein the multiplication result is used as a self-adjusted threshold based on the real time load condition of the transmission line; and identifying the fault type based on the compared result.