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Unlocking THD Insights from Power Factor Histograms‚No Harmonic Data Required
This white paper introduces a method for estimating Total Harmonic Distortion (THD) using power factor (PF) and displacement power factor (DPF) histograms, even when traditional harmonic or waveform data is unavailable. By leveraging always-enabled histogram data from PMI recorders, the approach enables calculation of average THD for entire recording sessions, providing actionable insights for power quality assessment. The method demonstrates good accuracy across various load conditions and equipment, allowing for early detection of harmonic issues and informed decisions on further monitoring.
Key topics include:
- Theoretical Background
- Using Histogram Data
- THD Estimation Process
Why utilities should care:
Enables reliable THD estimation without explicit harmonic data, maximizing the value of existing power quality recordings. Supports early identification of harmonic issues, efficient use of monitoring resources, and informed planning for follow-up investigations.
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