Because of being operated to accomodate the load variation, fired power plants need modern controller to satisfy frequency regulation, fast response and efficiency requirement. But in the way of developing the Digital Instumentation and Control System that can adopt advanced control algorithms, power plant simulator must be available for safe and convenient test.
In this thesis, a simple drum-type boiler model is proposed, using Signal Flow Diagram that describes the system by a collection of basic time response representing the relationship between process variables.
After verifying the model and thereafter building simulator based on the proposed model, we test the operation of controller and aprove stability or efficiency of implemented control algorithms.