Chaotic Power System Stabilization Based on Novel Incommensurate Fractional‐Order Linear Augmentation Controller

Abstract

The nonlinear dynamics of an incommensurate fractional-order single-machine infinite-bus (SMIB) power system benchmark model are explored and studied by means of modern nonlinear analysis theories, such as bifurcation, chaos, power spectral density (PSD), and bicoherence methods. The effect of incommensurate order derivatives on power system dynamics is presented. The study reveals that the power system undergoes interesting dynamics such as periodic motion, chaotic oscillations, and multistability whenever the system parameter values fall into particular ranges. A new fractional-order linear augmentation-based control scheme is applied to damp out the power system’s chaotic oscillation, change the stability of the coexisting states, and drive the system from multistability to monostability. The stability of the proposed control system is derived using Lyapunov theory. Simulation results confirmed the effectiveness and robustness of the proposed control scheme in damping power system oscillations and achieving good overall performance. The results in this paper will give a better understanding of the nonlinear dynamic behaviors of the incommensurate fractional-order SMIB power system.

Quenching chaos in a power system using fixed-time fractional-order sliding mode controller

“…A novel fractional-order with incommensurate order and linear augmentation control method is suggested in Ref. [17] to remove the coexistence of multiple attractors and chaos in the power system. All the aforementioned control techniques cannot ensure in advance a preallocated fixed convergence time to a stable equilibrium.…”