Phase to Ground Fault Analysis of a High Voltage Transmission Line Equipped with Resistive and Inductive SFCL

Advanced technologies in power electronics have always been a prominent factor in the development of new devices in power systems. Superconducting Fault Current Limiter (SFCL) can be regarded as a key component for future electric power systems. It is capable of eliminating the hazards during faults by increasing the short-circuit power of the network. SFCL devices can be either resistive (R-SFCL) or inductive (I-SFCL). They show negligible resistance or reactance, respectively, under normal operating conditions and they reliably switch to a high impedance state in the case of a high current. This paper studies the use of R-SFCL and I-SFCL by investigating their impacts on the short-circuit calculations of a high voltage line. The case study is for a 220 kV transmission line in the northern transmission network of Algeria which is subjected to a phase to ground fault in the presence of a fixed fault resistance. The impact of SFCL impedance (Z(SFCL)) of R-SFCL and I-SFCL on short-circuit parameters (symmetrical current components, transmission line currents, voltage symmetrical components, and transmission line voltages) is presented using a developed MATLAB program. Analysis and comparison of the obtained simulation results lead to the conclusion that using R-SFCL offers a better system performance than I-SFCL for the system under study.