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Unmasking Ferroresonance: Identifying and Preventing Hidden Power Quality Threats
This white paper explores the phenomenon of ferroresonance, a nonlinear electrical resonance that can cause severe voltage fluctuations and equipment failure in power distribution systems. It details the conditions that lead to ferroresonance, outlines how to identify its unique signatures using power quality recordings, and provides practical prevention strategies. Real-world data and waveform analysis are presented to illustrate detection methods and the critical importance of transformer loading and switching practices.Key topics include:
- Overview of Ferroresonance
- Analysis of Power Quality Recordings
- Waveform and Harmonic Analysis
- Prevention Strategies
Why utilities should care:
Understanding ferroresonance enables proactive mitigation of catastrophic voltage events, reduces risk of equipment failure, and supports reliable grid operation. Early detection and proper transformer loading can prevent outages and costly damage, ensuring system stability and customer satisfaction.
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