This paper is focused on the proposal and validation of a procedure to obtain the necessary data to model the magnetization curve of saturated core reactors as required for the voltage regulator device constituted by a parallel combination of an inductive saturated unit and a fixed capacitor bank. The methodology to model the nonlinear device is based on constructive parameters and information associated to the type of magnetic material utilized to build up the equipment. The results are expressed in terms of the relationship between the core flux and current values which are used to feed the ATPDraw time domain simulator. Computational studies are then carried out to find the reactive power absorbed by the reactor as a function of the applied voltage, and the theoretical results are compared to three prototypes having different ratings. The experimental results derived from 7kVAr-0.22kV, 600kVAr-13.8kV and 3MVAr-34.5kV products are then utilized to validate the saturation curve ATP representation through a comparative performance analysis of the absorbed reactive power with the voltage variation.

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