Adaptive Nonlinear Control with Disturbance Attenuation for Multimachine Power Systems

Abstract This paper presents a design approach to nonlinear feedback excitation control for multimachine power systems with disturbance. It is shown that a decentralized nonlinear feedback control law, which stabilizes the power system with desired L2 gain from the disturbance to a penalty signal, can be designed by a recursive constructing approach. First, a state feedback law is presented for the case of the system with known parameters, and then the control law is extended to adaptive version for the case when the parameters of the electrical dynamics in the power system are unknown. Simulation result demonstrate that the proposed controllers guarantee transient stability of the system regardless of the system parameters and a large sudden fault.