Figure 10From: Assessing the hazard from geomagnetically induced currents to the entire high-voltage power network in SpainResistance structures. Resistance structures of (top) two-winding transformers, (middle) three-winding transformers, and (bottom) autotransformers connected to three-phase high-voltage (HV) and low-voltage (LV and LV') transmission lines at the substations.Back to article page