A backstepping sliding mode controller design for synchronous machine excitation systems for enhancing the transient stability

This research proposes a nonlinear composite excitation controller for synchronous generators (SGs) to improve power system stability. First, the nonlinear model is transformed into a reduced-order model using the nonlinear partial feedback linearization approach. Second, the control signal is produced by applying the reduced-order model to the suggested fast reaching law based-backstepping sliding mode controller (BSMC). Following that, the whole system's stability is maintained by employing the Lyapunov function theory. Finally, a simulation study with a big disturbance is performed to validate the suggested controller's theoretical notion. In addition, an existing controller is used to demonstrate the superiority of the proposed controller.