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Improved representation of generator and load dynamics in the study of voltage limited power system operations

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3 Author(s)
O'Keefe, R.J. ; American Electr. Power Service Corp., Columbus, OH, USA ; Schulz, Richard P. ; Bhatt, Navin B.

The implementation and significance of modeling improvements in operational planning studies of a voltage limited network interface in the AEP System are presented. The modeling improvements are with respect to conventional load flow based modeling and consist of significant elements relevant to system voltage performance documented in the literature. These elements include voltage sensitive dynamic load models; distribution system equivalents that include load tap changer (LTC) regulation of load voltage; generator field current limiting action; and generator voltage regulator reactive line drop compensation. Both dynamic and steady-state aspects of voltage stability performance of the AEP voltage limited network interface are addressed. The implications of conventional load flow modeling in operational planning studies are discussed with reference to the results of the generator and load modeling improvements

Published in:

Power Systems, IEEE Transactions on  (Volume:12 ,  Issue: 1 )