Controller Design and Load Frequency Control for Single Area Power System with Model Order Reduction Technique

The performance of power systems gets worsening due to the presence of sudden load changes, uncertainties of parameters etc. Therefore the design of load frequency control is very important in the modern power systems. This paper presents LFC control technique to reject the typical disturbance as well as control the large-scale system problems. Parameter uncertainty and load disturbance approach has been proposed to LFC design on the purpose of rejection of typical disturbances. This paper presents the model order reduction technique of Transfer function of the single area power system by using Routh approximation. The Second-order reduced system model has proposed instead of full order system to effectively improve the performance of the closed loop system. This entire approach is simulated in MATLAB environment for a single –area power system. In addition to this the reduced order power system is converted into digital domain for digital implementation of load frequency controller. Index Terms—Internal model control (IMC), load frequency control (LFC), model-order reduction, robustness, Digital domain.