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IEVref:692-02-08ID:
Language:enStatus: Standard
Term: potentially unstable state, <of an electric power system>
Synonym1: insecure state, CA US
[Preferred]
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Definition: alert state in which a credible event will result in instability, voltage collapse or cascade tripping

Figure 2 – Electric power system states

NOTE The arrows indicate the most important state transitions caused by credible events. Recovery transitions, in opposite directions, are effected by operator intervention.

Figure 3 – Examples of transitions within electric power system states

Note 1 to entry: This entry was numbered 191-22-07 in IEC 60050-191:1990.


Publication date:2017-12-15
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