Subsynchronous Oscillation

SSO.

Definition in an Article

Source: ¹

Subsynchronous oscillation is an electric power system condition where the electric network exchanges significant energy with a turbine-generator at one or more of the natural frequencies of the combined system below the synchronous frequency of the system following a disturbance from equilibrium. The above excludes the rigid body modes of the turbine-generator rotors.

---

Last modified: 2026-01-18

Related: oscillation · subsynchronous-resonance

← Subregions · Subsynchronous Resonance →

---

1. (1985). Terms, Definitions and Symbols for Subsynchronous Oscillations. https://doi.org/10.1109/TPAS.1985.319152 ↩