TAF PUBLISHING

Highly complex and integrated modern chemical process plants are susceptible to disturbances propagate throughout the plant from one unit to other interconnected units and create plantwide oscillations. These persisting oscillations are originated due to various faults such as sensor faults, valve faults, process faults, and controller tuning faults. A fundamental frequency and its harmonics can characterize these types of nonlinear faults. This paper demonstrates a novel datadriven off-line time-domain method to identify the root cause of plantwide or unitwide disturbances to troubleshoot plantwide disturbances using harmonics analysis. The successful application of the proposed method has been demonstrated through simulated data.