Cooperation of model predictive control with steady-state economic optimisation

Abstract

TheproblemofcooperationofModelPredictiveCon- trol (MPC) algorithms with steady-state economic optimisation is investigatedinthispaper. Itisparticularlyimportantwhenthedy- namicsofdisturbancesiscomparablewiththedynamicsofthepro- cess, since in such a casethe classicalhierarchicalmultilayer struc- tureis likely to benot efficientandgivethe economicyield smaller thanexpected. Thisisbecausetheeconomicnonlinearoptimisation problemcannotbethensolvedon-linetoupdatetheoptimaloperat- ingpointasfrequentlyasneeded. Ontheotherhand,simpletarget set-point optimisation based on linear models can be also in ciently accurate. This paper introduces approximate formulations of the target set-point optimisation problem which tightlycooper-