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Estimate Harmonic Distortion Using Only Power Factor Measurements
This white paper demonstrates a practical method for estimating current total harmonic distortion (THD) using only true power factor (PF) and displacement power factor (DPF) readings, even when direct harmonic measurements are unavailable. Through theoretical derivation and real-world examples, the paper quantifies the relationship between PF, DPF, and THD, showing that the ratio of PF to DPF can provide a reliable estimate of current THD in typical utility environments, particularly when voltage distortion is minimal.
Key topics include:
- Background: PF, DPF, and Harmonics
- Theoretical Basis for THD Estimation
- Experimental Setup and Methodology
- Analysis of Results
- Real-World Application Examples
- Accuracy and Limitations
Why utilities should care:
Enables rapid detection of high harmonic distortion using existing power factor data, improving power quality monitoring and troubleshooting without the need for specialized harmonic analyzers or additional instrumentation.
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