COMPONENT FAULT ISOLATION IN A FLUID CATALYTIC CRACKING UNIT VIA ANALYTICAL REDUNDANCY

摘要

This paper considers an approach to detect and isolate component faults for a Fluid Catalytic Cracking (FCC) unit. Model based analytical redundancy is used on an augmented linearized model of the nonlinear FCC unit to the isolation of faults. Some component faults are modeled and implemented in a software package to test the considered approach. The proposed design is tested using a nonlinear simulation of the FCC unit model. The results show that the linear observed-based approach applied to an augmented state of the FCC to component fault detection and isolation can be used with success. The nonlinear behavior of the FCC however has some effect on the residuals. The detection and isolation can be reached with the help of a threshold.