Multiple swing transient stability assessment with phasor measurements

This publication introduces a methodology to detect transient stability in power systems using Wide Area Measurements (WAMS). Identification of transiently stable and unstable power oscillations, for several coherent groups of machines, is achieved with the use of the proposed Out-of-Step protection methodology. This methodology is also able to detect instability after the first swing of oscillation and is capable of adapting to different system conditions.