This paper presents a study of the control and stability of a synchronous generator connected to an infinite bus via two parallel transmission lines when the system operate at high loading conditions and subjected to different disturbances.
An effective mean of damping the oscillations resulting from the disturbances is to provide the synchronous generator with power system stabilizer (PSS). An adaptive proportional-plus-integral-plus-derivative (PID) PSS is suggested in this paper. In this technique, the controller parameters (propor-tional, integral, and derivative constants) are not fixed but they are computed and updated according to the system operating conditions. Different stabilizing signals are used for the PID-PSS. Each signal is weighted by a factor used arbitrary to get the best performance of the generator under these conditions. The computer results obtained from simulation study are compared with the results of the system without a controller.