A New Method for Adaptive Distance Relay Setting in the Presence of SSSC using Neural Networks

The control parameters of static synchronous series compensator (SSSC) can significantly influence the apparent impedance seen by a distance relay, thus making it over-reach or under-reach for different cases. In this paper, a new method for setting the distance relays in the presence of SSSC for a first zone protection is presented. This paper reveals the problem imposed by SSSC and suggests a neural network-based approach as a solution. The boundaries of the relay operation characteristic are modified according to the control parameters of SSSC to avoid incorrect operations of the distance relay. Artificial neural networks (ANNs) have been used for the task