An ANN-based distance protective relays of transmission lines

The distance relay measures the impedance from the relay location to fault point. The measured impedance is affected by the fault resistance, fault point, etc., that causes the relay operation overreach or under reach. In this paper, an ANN based distance relay has been proposed to locate the fault distance when a fault appears with the fault resistance. By training and testing a number of fault simulations, it has been seen that the ANN based distance relay can estimate the fault position better than conventional relays.