Fault diagnosis strategy for startup process based on standard operating procedures

CATEGORY: DEBUTANIZER
2013 25th Chinese Control and Decision Conference (CCDC), 25-27 May 2013, Page(s): 4221 – 4226, Guiyang, China
Fault diagnosis strategy for startup process based on standard operating procedures
Jing, Zhang ; Department of Automation, Tsinghua, Beijing 100084 ; Boang, Liu ; Hao, Ye
Abstract
In the chemical process industry, startup typically is initiated by plant operators who follow predefined standard operating procedures (SOP) so that the plant settles into a steady state. Operator errors and process faults during startup are common. Existing diagnostic methods do not take operator errors into account, and do not make full use of the knowledge of SOP.
Authors present a fault diagnosis strategy for a startup process based on SOP. The approach proposes behavior observer combined with dynamic PCA to simultaneously estimate process faults and operator errors. They have implemented the method on UniSim.  They have determined that it successfully detects faults during the startup of a debutanizer.
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