System and method for control of slope imbalance in model predictive control

摘要

Temporary relaxation of constraints allows for effective and cost effective operation in certain process models. The slope imbalance is controlled using soft landing constraints. Such soft landing constraints allow for a smooth return to the slope limit, thereby continuing the operation of systems such as petrochemical systems with several inflows and outflows, as opposed to forced shutdown of the system. Is possible. The slope imbalance can also be controlled by determining the unbalance slope and unbalance setpoint slope and using these constraints to solve the process model dynamic control problem. .