Plant Abnormality Notification for Stop-Time Inspection Items
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Solution Overview
Problem
In plants equipped with gas turbines, detecting abnormalities is challenging as some inspection items can only be checked when the plant is stopped, leading to potential omission of unchecked items in information, making it difficult to identify all inspection items immediately upon detecting a sign of abnormality.
Innovation Solution
A notification device and method that includes an abnormality estimation unit, item specifying unit, notification unit, stop-time item specifying unit, check result acquisition unit, and stop-time item output unit to identify and notify inspection items, allowing for efficient checking during plant stoppage and updating occurrence probabilities based on check results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If inspection items are checked during plant operation, then inspection efficiency is improved, but some inspection items cannot be checked (only checkable when stopped)
Solution Approach 1:
The system performs preliminary classification of inspection items into two categories: those checkable during operation and those requiring plant stoppage. By identifying and separating stop-time inspection items in advance, the system ensures they are not overlooked during operational inspections, thereby maintaining inspection completeness while preserving efficiency during operation.
2Loss of information
If all inspection items are notified simultaneously, then information completeness is improved, but information management becomes complex and inspection items may be buried
Solution Approach 1:
The notification system segments inspection items into distinct categories based on inspection timing requirements. Stop-time inspection items are separated from other inspection items and presented as a distinct list. This segmentation reduces information management complexity by organizing notifications in a structured manner, making it easier for operators to identify and prioritize specific inspection tasks without being overwhelmed by a undifferentiated list of all items.
3Measurement precision
If repeated checking of same inspection items is performed, then detection accuracy is improved, but time consumption increases and unchecked items may be buried
Solution Approach 1:
The system implements a feedback mechanism that tracks the inspection status of each item and provides this information back to the notification system. When an inspection item has already been checked, the system receives feedback about its status and adjusts subsequent notifications accordingly, preventing redundant notifications for already-checked items. This ensures detection accuracy is maintained through repeated checking of necessary items while avoiding unnecessary time consumption from re-notifying about completed inspections.
Data Source
AI summary
A notification device is provided with: an abnormality estimation unit for estimating a state relating to an abnormality of a plant and a factor relating to the abnormality of the plant; an item specifying unit for specifying inspection items on the basis of the abnormality of the plant and the state relating to the factor relating to the abnormality of the plant estimated by the abnormality estimation unit; a notification unit for notifying of the inspection items specified by the item specifying unit; a stop-time item specifying unit for specifying the inspection items which should be checked at a time of a stop out of the inspection items specified by the item specifying unit; a check result acquisition unit for receiving a check result for the inspection items notified of by the notification unit; and a stop-time item output unit for outputting the inspection items which should be checked at the time of stop.