Intelligent fault locator and zone isolation for transmission line

Power transmission systems play an important role in modern society. When transmission system outages occur, fast and proper restoration is critical to improving service quality and customer satisfaction. To ensure high power quality, an intelligent and reliable protection system is required. This system must be able to handle faults in transmission system that occur for a various of random causes; it must also grant for rapid detection and precise location of the fault, isolation of the faulty section, and prevention of devastating damage to people and equipment. In this article, the ANN (Artificial N3eural Network) is proposed as a mechanism for fault detection, classification, and localization. This new approach can be trained by measuring three-phase currents and voltages and implemented in a relay to make it intelligent. Therefore, in case of a fault, the proposed intelligent relay can locate the fault and send a tripping command to the circuit breakers to disconnect the faulty zone from the whole structure. Different fault scenarios are considered to test the tripping measures.