IED Alarm Arbitration via Power Level Ownership
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Solution Overview
Problem
In electrical power systems, multiple intelligent electronic devices (IEDs) often detect the same alarm event, leading to numerous separate reports to the monitor and control system, which is tedious and time-consuming for users, as each IED reports individually without consolidation.
Innovation Solution
IEDs equipped with the capability to detect alarm events, communicate with each other, and perform an arbitration process to determine ownership of the alarm event based on operating power levels, aggregating information and reporting it to the monitor and control system as a single report, thereby reducing redundant reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each IED reports alarm events independently to the monitor and control system, then complete alarm information is captured from all nodes, but the number of alarm reports increases significantly, creating user workload and time consumption
Solution Approach 1:
Multiple IEDs that detect the same alarm event merge their reports into a single consolidated alarm report. The system identifies duplicate alarms from different IEDs and combines them, assigning one IED as the primary reporter while other IEDs suppress their individual reports, thereby reducing the total number of alarm reports while maintaining complete alarm detection coverage
Solution Approach 2:
The monitor and control system acts as an intermediary that receives alarm reports from multiple IEDs, identifies duplicate events through timestamp and event type comparison, and manages the consolidation process by determining which IED should report the consolidated alarm, thus reducing user workload while preserving alarm information completeness
2Loss of information
If each IED reports alarm events independently to the monitor and control system, then all alarm events are captured, but numerous separate reports are generated requiring user acknowledgment
Solution Approach 1:
The system merges multiple separate alarm reports into a single consolidated report for the same alarm event detected by multiple IEDs. By comparing timestamps and event characteristics, the system combines duplicate alarms and generates one unified report that requires only a single user acknowledgment, thereby preserving complete alarm event coverage while significantly reducing the time users spend on acknowledgment tasks
3Productivity
If IEDs communicate alarm information to each other and perform arbitration, then redundant reporting is reduced, but the complexity of the IED system increases
Solution Approach 1:
The monitor and control system serves as an intermediary that handles the complex arbitration logic between multiple IEDs. IEDs communicate their alarm detections to the central system, which then determines which IED should take ownership of the consolidated report based on predefined criteria such as IED priority or location, thereby improving reporting efficiency while avoiding the need for complex peer-to-peer arbitration protocols among IEDs
Data Source
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AI summary
Systems and methods for managing alarms in an electrical power system employ intelligent electronic devices (IEDs) equipped with alarm arbitration capability. This capability allows an IED to aggregate alarms from multiple other IEDs relating to the same event or overlapping alarm events and provide one report about the event to a monitor and control system. In some embodiments, the alarm arbitration is performed based on IED power levels, that the IED having the highest power level is designated as the owner of the alarm event for alarm reporting purposes. Such an arrangement allows one IED to send a single report to the monitor and control system instead of potentially dozens of individual reports being sent by potentially dozens of IEDs for the same event or overlapping alarm events.