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Unlocking Hidden Power Quality Events with THD-Based Waveform Capture
This white paper demonstrates how Total Harmonic Distortion (THD)-based waveform capture triggers enable detection of complex power quality events that traditional RMS-based methods miss. By monitoring rapid changes in THD from one cycle to the next, utilities can capture and analyze transient disturbances such as capacitor bank switching, voltage notching, and oscillatory transients. The paper details the logic, configuration, and practical examples of THD-triggered waveform capture, highlighting its advantages for comprehensive power quality monitoring.
Key topics include:
- Waveshape Trigger Logic and Settings
- Analyzing the Results
- Examples and Recommendations
Why utilities should care:
THD-based waveform capture reveals transient and sub-cycle events that standard RMS triggers overlook, enabling more accurate identification of power quality issues, improved event classification, and better-informed operational decisions for grid reliability.
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