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A New Practical Approach to Transient Stability-Constrained Optimal Power Flow

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3 Author(s)
Pizano-Martinez, A. ; Fac. of Electr. Eng., Univ. Michoacana de San Nicolas de Hidalgo, Morelia, Mexico ; Fuerte-Esquivel, C.R. ; Ruiz-Vega, D.

This paper presents a new, significantly improved, approach to formulate a global transient stability-constrained optimal power flow (TSC-OPF), where the sets of dynamic and transient stability constraints to be considered in the optimization process are reduced to one single stability constraint. This constraint is derived from dynamic information provided by the SIngle Machine Equivalent (SIME) method and is only expressed in terms of steady-state variables, which allows us to diminish the length of the time-domain simulation to be included into the global TSC-OPF to a single (initial) time step. In this way, the size of the resulting optimization problem is reduced to one very similar to that of a conventional OPF, overcoming the main drawback of global TSC-OPF techniques (its huge dimension) while maintaining its accuracy and improving its practical application to real power networks. Effectiveness of the proposal is demonstrated by numerical examples on the WSCC three-machine, nine-bus system and the Mexican 46-machine, 190-bus system.

Published in:

Power Systems, IEEE Transactions on  (Volume:26 ,  Issue: 3 )

Date of Publication:

Aug. 2011

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