A Comparative Fault Analysis in Series Compensated Line during Power Swing

A Power swing block is very much necessary to avoid unintentional operation for modern distance relay at the time of power swing condition. However, in presence of power swing condition if any fault occurs then the relay immediately operate to maintain security for the apparatus.In series compensated line during power swing the fault detection is very complicated due to capacitor in the protection circuit. In this paper by negative sequence component of current the classification and location of symmetrical and unsymmetrical fault is easily possible. The data simulated by EMTDC/PSCAD software in a series compensated line for power swing condition and is tested and found to be accurate.