SYSTEMS AND METHODS FOR LOCATING DEFECTS ON A SINGLE-CONNECTED LOAD TRANSMISSION LINE

摘要

P The position of a fault in a transmission line (10) is determined by obtaining measured circuit parameters including intensity and voltage values measured before fault and at fault at the transmission and reception ends. The phase angle difference due to non-synchronized measurements can be calculated by using the intensity and voltage values measured before the fault. The load impedance of the connected load is calculated. A first and a second fault position are respectively calculated by assuming that the fault is located respectively on the origin side (11) or on the destination side (12) of the branch node. The fault position is chosen at one of the first and second fault positions, by selecting the fault position having a value in a predetermined range representing a total distance between two nodes. /P