A review on Series Compensation of Transmission Lines and Its Impact on Performance of Transmission

Abstract — Insertion of series capacitor in transmission line reduces net transfer reactance of line and it gives greater power transfer capability of the lines. It also improves power flow control & voltage regulation of lines. But it also causes problem to the conventional distance protection scheme during fault condition. The major problem to the distance relay is to measure correct impedance from relaying point to fault point when series capacitor remains in fault path. This paper briefly discusses need of series compensation, basic series capacitor model and problems due to series compensatio