Transient stability improvement with Neuro-Fuzzy control of STATCOM in single-machine system

In this paper, the goal is the improvement of transient condition in a single-machine system with designing of the nonlinear controllers for static Synchronous Compensator (STATCOM). By obtaining the Lyapunov function in presence of compensator in the system, some controllers are designed for it which by satisfying the Lyapunov stability criteria will increase the margin of transient stability and decrease the oscillation in the single machine system. For single machine with infinite bus (SMIB), three control methods of energy function (EFC), Fuzzy controller (FC) and Neuro-Fuzzy controller (NFC) presented and considered the effect of each of the above mentioned control methods of power system stability enhancement. The results of the simulations confirm the Neuro-Fuzzy controller ability in the improvement of the system transient conditions after occurrence of the fault.