Fixed-time fault-tolerant control for power system with multiple actuator constraints

This paper copes with the fixed-time fault-tolerant control problem for a single-machine infinite power system with static VAR compensators. In order to handle the controller design problem caused by the actuator failures and unknown dead zone input, a fuzzy fault-tolerant control algorithm is derived by introducing the adaptive backstepping method. An adaptive fixed-time control strategy is designed to guarantee that the output signal can track the desired trajectory within a fixed time, where the convergence time is independent of the initial condition. Compared with existing results, the proposed controller guarantees the controlled system maintains semiglobal fixed-time stability and the tracking error converges to a small neighborhood around zero. Both actuator faults and dead zones have been considered, which can better meet the practical control requirements. A simulation example demonstrates the designed controller.