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Unlocking Power Quality Insights Through Harmonic Analysis
This white paper details the calculation of harmonics and interharmonics in electrical systems using the Discrete Fourier Transform (DFT). It explains how waveform distortions, primarily from nonlinear loads, can be decomposed into harmonic components, and outlines industry standards for measurement and analysis. The paper also covers the formation of harmonic and interharmonic groups, providing practical examples and formulas for accurate power quality assessment.
Key topics include:
- Harmonics from Nonlinear Loads
- The Discrete Fourier Transform (DFT)
- Industry Standards for Harmonic Measurement
- Calculating Harmonic Magnitude and Phase Angle
- Interharmonics and Harmonic Groups
Why utilities should care:
Accurate harmonic analysis enables identification of waveform distortion sources, supports compliance with power quality standards, and informs mitigation strategies to reduce equipment stress, improve reliability, and optimize network performance.
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