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Accurately Estimate Power System Ring Frequencies Using ProVision and PQ Recorders
This white paper details a practical methodology for estimating ring frequencies caused by resonances between power correction capacitors and inductive loads using ProVision software and waveform data from PMI's PQ recorders. It explains data collection techniques, waveform analysis, and frequency estimation methods, including the use of harmonic magnitude plots for verification. The findings enable more precise identification and mitigation of oscillatory transients in electrical circuits.
Key topics include:
- Data Collection
- Finding and Isolating Resonances in Waveform Data
- Estimating Ring Frequency
- Pitfalls That Occur When You Don't Use the Peak
- Using Half Cycles to Find Ring Frequency
- Using the Harmonic Magnitude Plot
Why utilities should care:
Understanding and mitigating resonant frequencies in power systems reduces equipment stress, improves power quality, and minimizes downtime. Accurate ring frequency estimation supports effective circuit tuning and filter design, enhancing grid reliability and operational efficiency.
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