MULTIVARIABLE CONTROL SCHEME FOR LARGE-SCALE CHEMICAL PLANTS

PATRICIO LUPPI; DAVID ZUMOFFEN; MARTA BASUALDO

Buenos Aires

Congreso; 23 Congreso Argentino de Control Automático; 2012

Asociación Argentina de Control Automático

In this work, the plantwide control (PWC) methodology presented in Luppi et al. (2011) is improved in order to obtain better disturbances rejection. The procedure is based on the net load evaluation (NLE) index (Zumoffen and Basualdo (2010)). It allows to configure a sparse controller structure by considering a trade-off between servo and regulator behavior. Here, the cost function minimization drives to select a specific model which is accounted for the multivariable controller design, in the context of internal model control (IMC) implementation. The complete PWC methodology is applied to the pulp mill plant obtained from Castro and Doyle (2004b). It is tested through closed-loop simulations including several disturbances and setpoint changes. The comparisons with previous results are given too for obtaining the final conclusions.