The Protective Coordination Improvement of Distance Relays of High Voltage Lines via Artificial Neural Networks

Document Type : Original Article

Abstract
In this paper, an adaptive unit is designed for distance relay using the
Artificial Neural Network (ANN) to study the effect of power oscillation
on distances relays in the presence of distributed generation sources. The
proposed system, along with the relay constant setting unit, uses the local
information to set the trip limit for the relay. In this case, the adjustment of
the relay protection zones will be adapted simultaneously as the conditions
of the dispersed generation units' change, in order to prevent from the
faulty operating of the relay