A repetitive motion that can be either undamped, positively damped, or negatively damped.
Last Updated: June 18, 2025
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An oscillation is just a repetitive motion that can be either undamped, positively damped (decaying with time), or negatively damped (growing with time).
Types of oscillations include:
- Transients: Usually high frequency and highly damped
- Local plant: Usually from 1 to 5 Hz
- Inter-area oscillations: From 0.15 to 1 Hz
- Slower dynamics: Such as AGC, less than 0.15 Hz
- Subsynchronous resonance: 10 to 50 Hz (less than synchronous)