This talk is partially based on the IEEE Proc.  paper, Nov 2005
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Illustration on the NPCC equivalent system [3]
•An example of  A DYNAMIC problem: A line carrying large power is tripped. This results in  low frequency inter-area oscillations with common controllers; low frequency voltage oscillations.
•An example of STEADY-STATE FEASIBILITY problems during increased transfers (from PJM, through NYISO into IESO).