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Rotor Angle Stability

The ability to remain in synchronism under normal and disturbed conditions.

Definition in an Article by a Task Force

Source: 1

Rotor angle stability is concerned with the ability of the interconnected synchronous machines in a power system to remain in synchronism under normal operating conditions and to regain synchronism after being subjected to a small or large disturbance.

Definition in a European Union Regulation

Source: 2 (p7)

'rotor angle stability' means the ability of synchronous machines to remain in synchronism under N-situation and after being subject to a disturbance;

Last modified: 2025-06-19

Related: stability · frequency-stability · voltage-stability · n-situation

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  1. N. Hatziargyriou and others (2021). Definition and Classification of Power System Stability - Revisited & Extended. https://doi.org/10.1109/TPWRS.2020.3041774 ↩

  2. (2017). Commission Regulation (EU) 2017/1485 of 2 August 2017 establishing a guideline on electricity transmission system operation. http://data.europa.eu/eli/reg/2017/1485/oj ↩