Eigenvalue sensitivities of excitation system model and parameters

Based on the theory of dynamic stability of small disturbance, several typical excitation system models in power system analysis software package (PSASP) are connected to the Phillips-Heffron model in this paper. It derives the detailed excitation system model used for the analysis of low-frequency oscillation in power system and then the particular model is extended to the multi-machine system. An improved eigenvalue sensitivity concept is presented to discuss the effects that different excitation system models and parameters have on low-frequency oscillation .The simulation results show that some parameters of the excitation controller can affect low-frequency oscillation mode clearly and so it is of great importance to set, to identify and to measure these parameters.