Improvement of power system transient stability by using controllable series compensator

The purpose of this investigation is three fold: development of a nonlinear controller suitable for short-time frame dynamics; application of the developed nonlinear controller to improvement of transient stability of large scale power systems; and implementation of the designed controller and its application on power systems for simulation and analysis purposes. In this paper, we outline the mathematical development and the application of the developed controller to study transient stability of a small scale power system. Because power system transient stability, flexible AC transmission systems (FACTS), and nonlinear control are the key building blocks in this paper, we briefly outline these building blocks and how they relate to each other for improved transient stability analysis and power system control.