Observer Output Feedback Load Frequency Control for a Two-Area Interconnected Power System

Abstract

Abstract. This paper presents an observer output-feedback load frequency control for power systems with uncertain parameters and time delays in communication networks. First, an observer-based controller is designed dependent on only the observer output. Therefore, the conservatism is reduced and the robustness is enhanced. It also both save computing time and make the control method simpler. Second, the stability of both the observer error system and closed-loop control system is proven via the Lyapunov direct method. Moreover, simulation results show that the proposed observer output-feedback load frequency controller results in shortening the frequency's transient response, maintaining required control quality in the wider operating range, and being more robust to uncertainties as compared to some existing control methods.KeyWords: load frequency control, interconnected power systems, observer output.