Abstract
A method of optimal analog-digital plant control based on an autoregressive model is proposed. Advantages of the proposed ADC (analog-digital coordinated control) scheme over the APC (automatic plant controller) scheme are demonstrated by the simulation test of the once-through boiler. The proposed method is applicable to boilers in general and it would be useful in practice to change gain matrix and other control constants according to the variation of operating state or load level of the thermal plant. It was concluded that the proposed control system makes it possible to improve the load follow-up capability.
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