Design of Superheat Steam Temperature Controller Based on Discount Recursive Least Square Adaptive DMC

To avoid superheater steam temperature of supercritical boiler effect such as presumably higher or lower by disturbance,this paper proposed an adaptive dynamic matrix control(DMC) algorithm based on the theory which combining DMC with discount recursive partial least squares(DRPLS).This method can reduce the effect of the old data,and tone up new data.That improves the predictive capability of model.Based on discounted-measurement the model has the better flexibility and adaptability.A simulation for the superheated steam temperature control system of 600MW supercritical once-through boiler using presented method is carried out,and results in that the control system performance is better than conventional PID cascade control.