Implementation and laboratory test results of an Elman network-based transmission line directional relay

A transmission line fault direction identification module based on an Elman recurrent network has ben implemented on a DSP board and its behavior is investigated on a physical power system model. Details of implementation and the experimental studies are given and analysed in the paper. Studies show that the proposed approach is able to identify the direction of a fault on a transmission line rapidly and correctly. It is suitable to realize a fast transmission line directional comparison protection scheme.