Fault detection and reconstruction for single area load frequency control system

Abstract

In order to improve the reliability of the single area load frequency system, the problem of fault diagnosis of the single area load frequency control systems based on observer is studied. In this paper, the issues of fault detection and reconstruction for single area load frequency control systems with uncertainty and disturbance by designing adaptive sliding mode observer are considered. By constructing a single area load frequency control system model, the dynamic equations of the load frequency control system are given. Then, a robust adaptive sliding mode observer is designed, and fault diagnosis is carried out for the system. Next, based on super-twisting algorithm the derivative of system output can be obtained, and the purpose of reconstruction for the actuator faults is realized. Subsequently, the proposed methods of both fault detection and reconstruction are applied to a single area load frequency control system, and the simulation results verify the feasibility and effectiveness of them.