Power system stability enhancement using Lyapunov theory

This paper describes the enhancement of power system stability using the application of Lyapunov stability theory. It is proved that system becomes more stable with the inclusion of additional controls in the model. Method of mathematical manipulation is used. For the system modeled, Lyapunov type energy functions and their derivatives are derived to determine stability status of the system. First, without controlling elements and then with the inclusion of the models of controlling elements like power system stabilizer and speed governor system.