Conventional controller based AGC of multi-area Hydro-Thermal power systems

The present study proposed the Automatic Generation Control (AGC) of multi-area hydrothermal interconnected power system with conventional controller. Multi-area power system consists of four power generating units (Two Hydro and two thermal). The thermal power generating is equipped with appropriate single stage reheater unit and the hydro power generating unit is equipped with a suitable mechanical governor. All four areas are interconnected through tie-line. The conventional integral controller is employed into power system to improve the dynamic performance. The gain value of the integral controller is tuned using trial and error method with three different objective functions (Integral Time Square Error (ITSE), Integral Time Absolute Error (ITAE)) and one percent Step Load Perturbation (1%SLP) in area 1. It is observed from the response that the ITAE objective function tuned integral controller provided better result compared to ISE tuned controller. The time domain specification for the simulation is utilized to study the performance of the system with different objective functions and conventional controller.