Once-through boiler steam temperature control using Dynamic Matrix Control technique

This paper presents an application of Dynamic Matrix Control (DMC) for controlling steam temperatures in a large-scale once-through boiler-turbine system. In order to control the steam temperatures, we choose a spray and a damper as two controllers. The step response model for the DMC is generated for the two major output variables, superheater and reheater temperatures, by performing step-input tests. On-line optimization is performed for the DMC using the step response model. Proposed controller is implemented in a large-scale power plant simulator and the simulation results show satisfactory performance of the proposed DMC technique.