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IEVref:603-03-22ID:
Language:enStatus: Standard
Term: steady-state instability (of a power system)
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Definition: lack of steady-state stability

NOTE 1 – Steady-state instability usually occurs due to excessive power transfers.

NOTE 2 – Under this condition, the derivative of the active power with respect to the angle of deviation between at least one generator's e.m.f. and the reference e.m.f. is negative.

NOTE 3 – A power system is steady-state unstable for a steady-state operating condition if, following any small disturbance, it fails to reach a steady-state operating condition.


Publication date:1986
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