Automatic Generation Control of an interconnected multi-area reheat thermal power systems with conventional proportional-integral controller considering various performance indices

This paper presents the analysis of Automatic Generation Control (AGC)/Load Frequency Control (LFC) of conventional three area interconnected thermal power systems. The current study considered suitable Generation Rate Constraints (GRC), reheat and non-reheat turbine. Optimum gain settings of the conventional controllers are obtained, both in the constraints and non-constraints modes using with three different performance indices. Dynamic performance of the system is analyzed considering one percent of step load disturbance is in either area of the system. Furthermore, time domain specification analysis is used for the system performance evaluation. The analysis established that Integral Time Absolute Error (ITAE) based conventional controllers yield better controlled response and good dynamic performance compared to other indices.