Nonlinear Power System Stability Study by Liapunov Function and Zubov's Method

Although there are many publications on power system stability, the application of Liapunov's direct method to the study is relatively new. Gless[l] used an energy integral as a Liapunov function to study 1-, 2-, and 3-machine problems. El-Abiad and Nagappan,[2] also based their studies of the transient stability of a multi-machine system with losses on energy concepts.