Evaluation of performance of distance relays in presence of series compensators

This paper investigates the ability of impedance based fault locating systems in series compensated lines. Behaviour of Series capacitors and their built-in protection system has been studied to analyse the dynamics of the system during short circuit faults. This paper also aims at investigating attempt to provide a framework to facilitate a reliable decision making in the real time situation by amending conventional fault locating algorithms. The algorithm is simulated using MATLAB Simulink for a 220kV transmission line.