Analysis and control of power system oscillations

Power systems contain many modes of oscillation due to a variety of interactions among its components. Many of the oscillations are due to synchronous generator rotors swinging relative to one another. The electromechanical modes involving these masses usually occur in the frequency range of 0.1 to 2 Hz. Particularly troublesome are the intra-area oscillations, which typically are in the frequency range of 0.1 to 1 Hz.