Definition: | state of an electric power system in which a credible event will result in loss of load, stresses of system components beyond their ratings, bus voltages and system frequency outside tolerances, cascading, voltage instability, or some other instability
NOTE 1 – The alert state can be adequate, inadequate, or partially adequate. If it is partially adequate, then a credible event may result in additional loss of load.
NOTE 2 – See figure 191-22.
X
|