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Unlocking Reliable Detection of Oscillatory Transients with Advanced Waveform Analysis
This white paper explores the challenges of capturing oscillatory transients in electrical distribution systems, particularly those caused by capacitor bank switching. Traditional RMS-based triggers often miss these short-lived, high-magnitude events due to minimal RMS changes. The paper demonstrates that using waveshape-based triggering, specifically monitoring changes in Total Harmonic Distortion (THD), enables accurate detection and analysis of these transients, ensuring better protection and system reliability.
Key topics include:
- Introduction to Oscillatory Transients
- Causes and Characteristics of Transients
- Limitations of RMS-Based Triggering
- Waveshape and THD-Based Triggering Methodology
- Case Study: Analyzing a Capacitor Bank Event
- Configuring and Interpreting THD Triggers
Why utilities should care:
Accurate detection of oscillatory transients prevents equipment damage, improves power quality, and enhances system reliability. Employing THD-based triggering captures events missed by RMS methods, supporting proactive maintenance and reducing costly unplanned outages.
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