A Reduced Generator Model with Excitation Limits

This paper presents a simplified generator model for use in dynamic studies of electric power systems. The proposed model captures important characteristics of generators that include voltage and frequency variation as well as excitation limits. The behavior of the model is compared to that of a well-accepted higher order model through application to an example two-bus power system. Examination of equilibria with or without excitation limits, responses to load variations, and responses to step inputs indicate that the proposed model captures key behaviors, and may often be sufficient for analysis of power system dynamics.