Cascade GPC for Superheated Steam Temperature Control

I. Benyó, J. Kovács, Z. Hímer, and U. Kortela (Finland)


Predictive control, cascade control, superheater control


The paper deals with preliminary results in the development of a General Predictive Controller for superheater temperature control. The approach is based on a linearized multivariable model of the process. The controller, in a sense, follows the traditional cascade scheme using the inner measured variable in the prediction. The nonlinearity of the controlled process is handled by on-line identification. The proposed controller is compared to a traditional PI cascade controller compensating the steam massflow disturbance in a feedforward manner. The evaluation is based on simulation experiments.

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