کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
585916 | 1453265 | 2016 | 14 صفحه PDF | دانلود رایگان |
• The main causes of long-standing alarms being nuisance are identified.
• Industrial examples are provided as supportive evidences of the identified main causes.
• A dynamic state-based alarm system is proposed to remove long-standing alarms.
• Two rules are formulated to select state variables.
• Industrial case studies illustrate the effectiveness of the dynamic state-based alarm system.
Long-standing alarms are those in the alarm state continuously for a long period of time. Some long-standing alarms belong to nuisance alarms, playing a detrimental role to the performance of industrial alarm systems, and hence they should be removed. The paper analyzes the main causes leading to long-standing alarms as nuisance ones; industrial examples from a large-scale thermal power plant are provided as supportive evidences of the main causes. A dynamic state-based alarm system is designed to remove long-standing alarms caused by the inconsistency between the alarm design and discrete-valued operating states. The design is based on two rules formulated to select state variables and a novel alarm generation mechanism to generate state-based alarm variables. Industrial case studies illustrate the effectiveness of the dynamic state-based alarm system in significantly reducing the severity of long-standing alarms.
Journal: Journal of Loss Prevention in the Process Industries - Volume 43, September 2016, Pages 106–119