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If rotor angle stability is the issue here then it is sufficient to just add system angles statistics channels and monitor the angle spread in each simulation.
If any generator goes out of step in the simulation the angle spread will increase. Angle spread is therefore a good indicator of rotor angle instability. If angle spread is high (<300-400 deg) the bus number of the most unstable generator is seen in the channel with bus number of maximum rotor angle.
It is thereby possible to identify unstable generators without adding channels for individual generators.
