The application of power system stabilizers to a multigenerator plant

The effect of power system stabilizers on the oscillatory modes of a genera ting plant, which consists of a number of equal, identical generators, is d iscussed. It is shown that the power system stabilizer design and the type of power system stabilizer input may alter the damping produced by the stab ilizer on the exciter mode and the intra-plant electromechanical modes. A p ower system stabilizer which is designed to match the ideal phase lead over a wide frequency range is shown to add damping to plant, inter-area and in tra-plant electromechanical modes. The exciter mode damping is shown to be reduced by power system stabilizers having frequency input