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A quality index applied to transient response evaluation of a synchronous generator

In this paper we propose to use a quality response index (QRI) to evaluate the transient stability response of electric machinery under fault conditions. This index is used to calculate a control constant for the improvement of the transient response of a machine-infinite bus system which results in an optimization problem formulation. This optimization problem is solved using genetic algorithms to obtain the best value of a control proportionality-constant parameter of the static synchronous compensator (STATCOM). Results of a case study considering several conditions (operation points, faults, and clearing times) are included.