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1. Introduction
•Power system stability may be broadly defined as that
property of apower system that enables it to remain in a
state of operating equilibrium under normal operating
conditions ad to regain an acceptable state of equilibrium
after being subjected to adisturbance [1].
•The robustness of a system is defined by the ability of
the system to maintain stable operation under normal
and perturbed conditions [2].
[1] P. Kundur, Power System Stability and Control. New York:
McGraw-Hill, 1994.
[2] PowerFactory User’s Manual DIgSILENT PowerFactory Version
14.0. DIgSILENT GmbH, Gomaringen, Germany 2008