⚡ PDC / PMU — Relayman Pi PDC Data Viewer

Event shading Point markers A/B cursors Go to (UTC):Go Notes config.ini Reset Zoom Save as PNG Save as CSV

 

Key:   event   gap (unverified)   outage (verified, no data) ⚡ outage entry ⚙N regime 🔗 correlated V+F — scroll to zoom, drag to pan, double-click to reset

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Deadband-compressed synchrophasor history from the Pi PMU data collector (SQLite .db, or gzipped .db.gz snapshot). Records are stored only when the signal left its deadband, plus periodic heartbeats — so quiet periods are sparse by design, not missing.

Lines connect heartbeats across quiet periods: the deadband logic proved the signal stayed in band, so the straight run is an assertion of "nothing happened", not interpolated data. Where a trace breaks, time is genuinely unaccounted for (gap) or the meter was dark (outage).

Time axis is UTC and time-proportional: scroll to zoom, drag to pan, double-click or Reset Zoom for the full span. The event pane lists only what overlaps the displayed window. Each channel's min–max boxes set manual Y-axis limits (blank = autoscale).

Draggable vertical lines. The readout shows the nearest stored record at each cursor — not interpolation, because between heartbeats the deadband bounded the signal but never measured it — plus Δt and per-channel ΔY.

A gap (red) means the collector was down: unverified, we don't know what the signal did. An outage (dark hatched) is a verified loss of voltage — the 734/735 streams only while it measures voltage ≥ 5% of nominal, so when the line collapses the meter stops sending and there is no data for the duration. The last voltage it measured before going dark is shown as V↓. Outages never appear in voltage_events (the disturbance can't close while the meter is dark), so they're reconstructed from the stream and counted separately in the header.

When the configuration changed within the data, a coloured settings-regime ribbon runs along the top and dashed verticals mark each change (aligned to the meter-frame activation instant). Each event is tagged ⚙N with its regime — click config on an event to see the exact settings that produced it and what changed from the previous regime.

Events the collector tied together as one physical disturbance carry a 🔗 badge. Click either to spotlight both the voltage and frequency members on their subplots (joined by a dashed tie) and frame them together; Reset Zoom or double-click clears it.

pmuSettingsDiff(a,b) and pmuAnnotateEvent('V'|'F', trigger_start).

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