Coordination of excitation and governing control based on fuzzy logic

In deregulated power systems, competition could push the system near its security limit. The issue of power system stability is becoming more crucial. The excitation and governing controls of a generator play an important role in improving the dynamic and transient stability of power systems. Typically the excitation control and governing control are designed independently. In this paper, the authors present a fuzzy logic based method for the excitation control and governing control. Fuzzy logic is applied to generate two compensating signals to modify the controls during system disturbances. A single machine to infinite bus system is applied in simulation. The oscillation of internal generator angles is observed to indicate the good performance of proposed control scheme