IEVref:191-22-02ID:
Language:enStatus: Obsolete
Term: unstable state (of an electric power system)
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Definition: state of an electric power system which is not a stable state

NOTE 1 – In unstable state, the electric power system is experiencing cascading, voltage instability, or other instability.

NOTE 2 – See figure 191-22.

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Publication date:1990-12
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