Voltage statbility analysis using Lyapunov function obtained by Krasovskii´s method

Stability analysis of a nonlinear dynamic system is a challenging task since long time in power system. However, in this paper Lyapunov function is used to find the stability of a nonlinear system very easily without calculating the exact solution. The Lyapunov function, that analyzes the stability of single machine infinite bus system, is constructed using Krasovskii´s method. The results obtained by the proposed method shows the variation in energy contents with the variation in load angles and load voltages, for a particular value of generator rotor angle.