Automatic generation control of an interconnected hydrothermal power system

This paper deals with automatic generation control of an interconnected hydrothermal system considering reheat type turbine in thermal plant area and low head turbine in hydro plant area using optimal controllers. The dynamical response of the load frequency control problem in an interconnected power system under consideration is improved with a practical viewpoint by designing the optimal output feedback controller. The optimal control methods are proposed and their dynamic responses are compared. The optimal control is determined by minimizing a performance index under the proposed output feedback conditions. The results indicate that the controllers exhibit better performance. In fact, the control systems designed on these methods satisfy the load frequency control requirements with a reasonable dynamic response.