Two Degrees of Freedom Observer Controller for Load Frequency Control with Communication Delay

Abstract

Two degrees of freedom (2-DOF) Smith predictor based observer controller is designed for load frequency control of two area systems with communication delay. The conventional proportional integral (PI) controller is used for command tracking and an independent observer based feedback controller is designed for disturbance of change in load demand. In interconnected power system, the presence of communication delay complicates the design and implementation of the controller. The original delayed system with unified Smith predictor (USP) is converted to an augmented plant which is used to design the robust controller. A stable dynamic performance is achieved with the designed controller.

Keywords: Communication delay, Unified Smith Predictor, load frequency control, two degrees of freedom

Cite this Article

Ashu Ahuja, Shiv Narayan, Jagdish Kumar. Two Degrees of Freedom Observer Controller for Load Frequency Control with Communication Delay. Journal of Control & Instrumentation. 2017; 8(2): 35–44p.