Grade-change control using INCA model predictive controller: application on a Dow polystyrene process model

A novel model predictive control architecture INCA has been implemented on a dynamic model of a Dow polystyrene production facility at Tessenderlo, Belgium. The controller allows for a controlled grade transition and pushes the process towards more profitable operating regions during normal production, subject to prioritized requirements. Results show an excellent tracking of a desired trajectory, together with large disturbance trajectory, together with a large disturbance rejection capability during the grade transition.