This page displays all detected power quality events within a selected time interval and provides tools for filtering, analyzing, and exporting the results.

Event Retrieval Limits:

The system allows retrieving up to 300 events at a time, provided that the selected time range does not exceed 30 days. If either limit is exceeded, a notification is displayed requesting adjustment of the selection criteria.


Filtering and Configuration:

The displayed events can be refined using multiple filtering options:

  • Events may be filtered by selecting a specific power channel from the drop-down list.
    If no channel is selected, events from all available channels are displayed.
  • Additional filtering can be applied by selecting one or more event types such as Dip, Swell, Interruption, RVC, Transient, or THD.
  • It is also possible to include or exclude flagged events, depending on the required analysis.
  • All selected filters are applied simultaneously, and the results table is updated accordingly.


Event Interaction 

Clicking on the Event ID opens the detailed event page.The event details page includes:

  • Trigger configuration (nominal values and thresholds)
  • Detailed event parameters
  • Associated waveform data


Flagged Events Visualization

  • Flagged events are visually distinguished in the results table using color highlighting.
  • Each color represents a specific classification or severity level.
  • This allows quick identification of critical or abnormal events.



Data Export

The system provides options to export the displayed data for reporting and further analysis:

  • Export as PDF report
  • Export as CSV file

The exported data reflects the currently applied filters and displayed results.


Event Recording Behavior

A snapshot of the power line waveforms during each event is automatically captured and stored for analysis.

The waveform recording follows the rules below:

  • A pre-event and post-event window is always included:
    • 100 ms before the start of the event
    • 100 ms after the end of the event
  • If the event duration is less than or equal to 300 ms:
    • The entire event duration is recorded
    • The event is reported as a single complete snapshot


  • If the event duration is greater than 300 ms:
    • Only a partial waveform is stored, including:
      • The first 150 ms of the event
      • The last 150 ms of the event


  • If the page is accessed while a long event (> 300 ms) is still active:
    • Only the initial part of the waveform is available
    • This includes:
        • 100 ms pre-event data
        • First 150 ms of the event
  • Events are automatically recorded when predefined thresholds are exceeded.
  • If an event is still active, the duration is masked by three dashes (---).
  • If the system goes offline while an event is active, the event remains open and is not automatically closed.
  • The event will continue to be updated once the system resumes operation.


Supported Event Types

The system detects and records multiple types of power quality events, including:

  • Voltage Dip
  • Voltage Swell
  • Interruption
  • High and Low frequency
  • Rapid Voltage Change (RVC)
  • Transient
  • Inrush Current
  • Voltage and Current Total Harmonic Distortion ( VTHD-F & ITHD-F)

Each event type has its own characteristics, trigger conditions, and recorded parameters.


Waveform Recording Overview

For each detected event, waveform snapshots are automatically captured to support detailed analysis.

  • A predefined duration is recorded before the event start and after the event end.
  • The exact recording behavior depends on the event duration.
  • Both waveform data and associated RMS values (for RMS-based events) are stored.

  • In addition to the common waveform representation, some event types include additional data or visualizations depending on their characteristics. For example:
    • In THD events, a snapshot of the harmonic components at the trigger instant is included.


    • In Transient events, a high-resolution snapshot from the waveforms of the triggering transient is included.





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