Modelling and Validation of the Magnetizing Curve to Represent Saturated Core Reactor Using ATP Simulator

Abstract

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.

A Comparative Performance Analysis between Saturated Core Voltage Regulators Using Silicon Steel and Amorphous Alloys

“…In [4], [8] the physical arrangement of a saturated reactor and its respective modelling on the ATP simulator are presented in detail. As one can see, the device in question shows similar operational principles to a saturated transformer, still emphasising, however, that the product under focus is presented as being made up of two identical three-phase arrangements, electrically interconnected, where each one is established as having three magnetic columns, as shown in the topology illustrated in Figure 3.…”

“…In regards to the modelling and implementation of the device on the ATP simulator consistent with [4], [5], [8], the final product can be found synthesized in Figure 4. Fig.…”

“…By use of the procedures detailed in [8], it is possible to correlate the BxH curve with the respective feature λxI linked to a given reactor, where λ is the concatenated flux and I the peak current consumed by the reactor.…”

“…This results in important perspectives to be considered, and within this scenario, the current study presents its principal objective, which is to correlate operational aspects associated with two devices, one made up of a reactor with a silicon steel core while the other with an amorphous alloy core. To this end, this study is based on computational models, which have already been developed [4], [8] and implemented on the ATP platform.…”

Saturated core voltage regulators: parameterization, computational models, and performance studies

“…To reach this goal, 2 study strategies are considered, each of which found on computer programs that have no retail value and, therefore, can be obtained free of charge. One of which is supported on time domain models, through the use of alternative transients program (ATP) software, which has already been employed for the goals set forth herein . Another uses the finite elements technique, under the terms set by the finite element method magnetics (FEMM) simulator.…”