Nonlinear Fault Tolerant Control Design for Multimachine Power Systems

Proposed here is a Fault Tolerant Control (FTC) design for nonlinear power systems with unknown actuator failures. The method is based on the efficient multi input-multi-output linearization technique. The power system considered here is consisted of two generators along with a load and an infinite bus via a transmission network. First, the derivatives of the system's output is calculated repeatedly, in order to find the relative degree of the system. Then the dynamics of the power system are linearized with the feedback linearization strategy. Subsequently, a nominal controller is designed to stabilize the system. In the proposed approach, if an actuator failure happens, the derived fault tolerant controller accommodates its effect. Simulation results confirm the usefulness of the adopted fault tolerant control scheme.