Incidents

Incidents in PME represent real world power events, such as disturbances or faults. An incident combines alarms, waveforms, and burst data from many sources in the system into a single representation of the power event. Instead of having to analyze each data point individually, you can look at an incident and see how the different pieces of information are linked together.

PME uses alarm types and alarm start times as criteria to determine which alarms to group into a specific incident. The start of an alarm marks the beginning of an incident. Any alarm of a similar type, that starts within a certain time interval is considered part this same incident. The grouping time interval is always based on the most recent alarm in the incident, which means that the counter is restarted every time a new alarm is added to the incident. If there is no more alarm that falls inside the interval, the incident is complete. The maximum duration for an incident is 24 hours and the maximum number of alarms in an incident is 500. A new incident is started the next time an alarm is recorded. See Alarm to incident mapping for more information.

The incident grouping time interval is different for different alarm types. For example, Over Voltage alarms have a time interval of 5 minutes. If a new Over Voltage alarm occurs within 5 minutes, for any source, it is grouped into the same incident. To make it easier to analyze incidents, PME categorizes them into types. The incident types are based on the alarm types.

The following table shows the Incident types and the grouping time intervals for each type: