A performance oriented impedance based fault location algorithm for series compensated transmission lines

• Propose a performance oriented fault location algorithm for series compensated transmission lines.
• Test the proposed algorithm on two different test system for various fault cases.
• Evaluate the fault location issues for series compensated lines.
• Compare the proposed algorithm with four selected fault location algorithms.

This paper proposes a performance oriented fault location algorithm for series compensated transmission lines. The algorithm estimates the fault location based on the calculated fault voltage and current using two end measurements and line parameters. Fault location computations are carried out considering faults existed before or after the compensator location on the line. The calculated MOV impedance is the key factor in determining whether or not the fault is located in front of the compensator. A 380 kV transmission line with a series capacitor and an MOV has been tested for various fault types, fault locations and fault resistances. The results show that the algorithm accurately estimates the fault location for all cases.