The Effect of Non-Dynamic Parameters of Excitation System on Stability Performance

A detailed state-space model of an automatic voltage regulator and exciter-generator unit is developed which provides for saturation in both exciter and synchronous machine. Via a perturbation analysis and Liapunov´s first method, the effect of varying the non- dynamic parameters of the excitation system on overall unit stability is studied. Critical parameters and their optimal setting ranges are identified. It is shown that without due regard for these critical regions, the stability limit of the generation unit can be made less favorable on auto matic control than on manual control.