Akademik Veri Yönetim Sistemi
Gazi Mühendislik Bilimleri Dergisi, cilt.11, sa.1, ss.104-120, 2025 (TRDizin)
Protection systems are crucial for ensuring the continuity and reliability of power systems. Simulating the power system before its implementation helps improve protection strategies. This study examines the coordination of non-directional overcurrent relays in a three-bus power system modeled in the ETAP software. A three-phase short-circuit fault was applied, and load flow analysis, short-circuit analysis, and relay coordination graphs were generated. To minimize relay operating times, the widely used Particle Swarm Optimization (PSO) algorithm and the Transit Search Optimization (TSO) algorithm, which was applied to relay coordination for the first time, were utilized. The results indicate that TSO significantly reduced the total relay operating time compared to both PSO and the calculated values. The total operating time, initially 1.428 ms, was reduced by 19.82% to 1.145 ms using PSO, and further reduced by 46.43% to 0.765 ms using TSO. Additionally, a direct comparison of PSO and TSO revealed that TSO achieved a 33.19% greater reduction in relay operating time than PSO. These findings suggest that TSO may serve as a more effective optimization method for relay coordination compared to PSO.