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Unlocking Advanced Power Quality Insights from Basic 60Hz Phasor Measurements
This white paper demonstrates how recording a minimal set of core power quality (PQ) measurements—specifically RMS values and fundamental (60Hz) harmonic magnitudes and phase angles—enables the derivation of a wide range of advanced PQ metrics. Through step-by-step mathematical computations, the paper shows how to reconstruct 60Hz phasors and use them to calculate THD, symmetrical components, unbalance, apparent power, displacement and distortion power factors, and reactive power. Practical examples and formulas are provided, illustrating that extended PQ analysis can be achieved efficiently with basic data, streamlining monitoring and diagnostics.
Key topics include:
- What Are These Core Measurements?
- Mathematical Computations
- THD
- Symmetrical Components
- Apparent Power
- Displacement Power Factor
- Examples of Algebraic Computations for All Measurements
- Reactive Power
- A Brief Note on Real Power
- Distortion Power Factor
Why utilities should care:
By leveraging just a few core measurements, it becomes possible to derive comprehensive power quality metrics, reducing data collection complexity while enabling faster diagnostics, improved reliability, and more cost-effective monitoring of electrical systems.
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