Adaptive finite‐time control for turbo‐generator of power systems with prescribed performance

Abstract

Control of turbo-generator is facing great challenges resulting from more renewable energies injected into power systems, and it is still a challenging task to improve the accuracy and convergence speed when the operation point changes. In this paper, an adaptive finite-time controller design is proposed for turbo-generators in the presence of bounded disturbances and unknown system dynamics. Compared with existing methods, the finite-time stability rather than asymptotic stability or uniformly ultimately bounded (UUB) can be guaranteed and prescribed transient performance can be achieved. First, the constant constraints on the system states and terminal sliding mode (TSM) manifold are proposed to enhance the transient performance. Furthermore, the uncertainties of the system are overcome by the neural network (NN), and both the bounded external disturbances and the reconstruction error of NN are handled by an adaptive term and a robust term. In addition, the important chattering-free property could be achieved by the boundary layer. Finally, the finite-time stability of the output in the system is rigidly proved via Lyapunov analysis, and the effectiveness of the theoretical result is substantiated by extensive simulations.

Neural network adaptive control for turbo‐generator of power systems with prescribed performance and unknown asymmetric actuator dead zone

“…This paper considers a model of the turbo-generator in a single-machine infinite bus (SMIB) power system, which is described by [1,12,36]. The SMIB system with a turbo-generator is showed in Figure 1.…”

“…The main work of this paper is to optimize [12]. In this paper, the result of [12] is optimized, the chattering problem caused by the sliding mode control method is eliminated, and the dead zone of the actuator is considered.…”

Prescribed performance control approaches, applications and challenges: A comprehensive survey

“…Clearly, there exists a compromise between multiple indices including prescribed performance and other control qualities. In practical applications, we should make a reasonable tradeoff between these indices [117,[157][158][159][160][161][162][163][164][165][166][167][168][169].…”

A Finite-Time Speed and Direction Control for Four-Wheel Drive System

“…In (Liang et al, 2021) an FTC was suggested for turbo-generators in the existence of limited disturbances and unidentified scheme dynamics. The constant boundaries on the system states and multi-terminal sliding mode were suggested to improve the transient performance.…”