Design Method of Alarm System for Identifying Possible Malfunctions in a Plant Based on Cause-Effect Model

摘要

A new alarm system design method is proposed, in which it is assumed that the sign patterns and alarm sequences generated by the alarm system are invariant for each possible plant malfunction in a plant. The proposed method gives the most sets yet provided of plant malfunctions that operators can distinguish using the alarm system. We applied the proposed method to select alarm variables for a simple chemical plant. Results showed that the method provides more alarm variable combinations that can identify possible malfunctions than a previously used method.