Robust Fuzzy-model based controller with sliding mode control for multi-machine power systems

In this paper, we present the design of a new type of fuzzy controllers to enhance the transient stability and achieve voltage regulation of multimachine power system subject to persistent disturbance by incorporating sliding mode control theory with fuzzy control technology. First, a fuzzy model of the given nonlinear system is constructed to represent the local dynamic behaviors of the given nonlinear system. A global controller is then constructed by combining all local state feedback controllers and a global supervisory sliding mode controller. The stability of the closed-loop system is proved mathematically based on the Lyapunov method. Simulation results illustrate the performance of the developed approach regardless of the system operating conditions.