Fault detection and phase selection using Euclidean distance based function for transmission line protection

In this paper, a new fault detection technique is proposed for transmission line protection using Euclidean distance between successive current samples. The proposed technique is extended to identify faulty phase. However the normal relays are not reliable in situations like sudden load changes, switching operations etc., and it is very important to discriminate the faults and transients. Now a day so many new techniques are implemented to overcome above difficulties. The proposed technique is effectively works under these situations. Finally it is observed that the proposed algorithm is more effective to detect faults in transmission line system. Simulations are carried out in MATLAB/SIMULINK.