Effect of the GICs on magnetic saturation of asymmetric three‐phase transformer.

The most commonly used models in geomagnetic‐induced currents (GICs) studies neglect the hysteresis phenomenon. In relation to this, the authors present an approach to integrate the hysteresis phenomenon to the finite‐element model (2D‐FEM) for the effects of the GIC which considers the current, as an input quantity. These currents are obtained by a dynamic electromagnetic model that the authors developed, and are compared with the results obtained by experimentation. This is the first time that this phenomenon has been shown in three‐phase transformers with load. They also provide other practical responses in relation to other papers in which their studies concern the imbalance GIC bias on the asymmetric three‐phase transformers with no‐load while the majority of the transformers operate on load. [ABSTRACT FROM AUTHOR]