On-time stabilization of single-machine power system connected to infinite bus by using optimized fuzzy-PID controller

Power systems are subjected to disturbance that may cause unacceptable power oscillations in transmission lines. The use of power system stabilizer has a great effect in controlling and damping of these low-frequency oscillations. Study and discussion in the field of designing different kinds of stabilizers constitutes one of the dynamic research areas concerning power systems. The major problem of stabilizers lies in their failure to respond well in different work conditions. To solve this problem, the fuzzy controller has been used. The aim of this study is to design Fuzzy-PID stabilizer in single-machine system connected to infinite bus by using hybrid big bang big crunch algorithm. The system was tested under different conditions, by changing the load by %+25 and %-25. Simulation results are compared in three scenarios and by applying three-phase to ground fault for the duration of 70ms. The results revealed good efficiency of this controller in stabilizing of power system in different conditions.

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