The New Approach in Modeling, Simulation and Hierarchical Control of the Fluid Catalytic Cracking Process II - Hierarchical control

In the second part of the paper is presented the hierarchical control structure, which is organized on three levels: conventional control level, advanced control level, and optimal control level; each levels being characterized by the output-input values and by dynamic characteristics. The author gives special attention to the second level, where was developed based on a model predictive controller. The investigation of performances for the predictive controller was performed using the dynamic simulator presented in the first part of the paper. From economic point of view, the development and the implementation of the hierarchical control structure for the catalytic cracking process is leading to increase the overall plant efficiency.