Fault direction identification utilizing new current-based index founded on rate of change of fault current

The proliferation of Distributed Generations (DGs) in distribution networks has provided power system operation improvement while raising some protection challenges. Turning to bi-directional, the schemes deregulated should be able deal with an out-of-zone fault. More specifically, DGs impose bi-directional fault current and directional relay employed identify correct direction so that protective relays are prevented from mal-operation This paper introduces a current-based algorithm utilizes pre-fault signal as reference. is designed based on rate change current. As it can inferred mathematical basis proposed method, low sensitivity decaying DC noise components. Also, index certain straightforward range variation between (-1, 1) for backward forward direction, respectively. performance evaluated different scenarios such resistance, sampling frequency, types faults three simulated systems laboratory test bench. simulation experimental evaluation results show accuracy speed comparison similar algorithms.