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Unraveling the Impact of Voltage Notching on Harmonic Distortion in Power Systems
This white paper explores the phenomenon of voltage notching, its measurable effects on harmonic distortion, and the limitations of current standards in addressing it. Through simulation and analysis, it demonstrates how notching differs from traditional harmonic issues, highlights the broadband nature of its frequency impact, and provides practical guidance for detection and mitigation using waveform capture techniques.
Key topics include:
- Introduction to Voltage Notching
- IEEE 519 Standard and Notching Limits
- Observations from Simulations
- Interpreting Notch Depth, Width, and THD
- Harmonic Composition of Notched Waveforms
- Distinguishing Notching from Traditional Harmonics
- Detection and Capture Strategies
Why utilities should care:
Understanding voltage notching and its unique contribution to harmonic distortion enables more accurate diagnosis of power quality issues, supports compliance with standards, and informs targeted mitigation strategies, ultimately improving system reliability and reducing misapplied solutions.
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