Integrated fuzzy logic generator controller with emergency control loop

This paper presents a fuzzy logic generator controller with emergency control loop. The controller consists of two blocks: a stability monitoring block, by which the stability of the generator is monitored in real time; and a control block, by which both the excitation control signal and the speed governing control signal are generated through a simple fuzzy logic and by using measured real power, terminal voltage and generator speed. Whenever instability of the generator is detected, the signals, to change the setting of the reference voltage and the real power output, are sent to the control block to shift the operating point to its new stable one in order to maintain the stability of the generator. To demonstrate the efficiency of the proposed generator controller, experimental studies have been performed on an analog simulator