Performance analysis of power differential based transmission line protection

This paper deals with investigation of novel fault detection for the protection of transmission line. Conceptually the difference of the average quantities for phase active power entering and leaving the lines are compared Computation of these quantities is carried out via simulating a tie line connecting two power system networks using MATLAB. The sensitivity of the proposed detector for internal fault and stability for external fault are observed for wide range of fault resistance. The test result shows remarkable stability during external faults and also depicts distinguished performance of the proposed power differential concept in detecting internal faults.