Assessing the hazard from geomagnetically induced currents to the entire high-voltage power network in Spain

Earth, Planets and Space

Table 3 Comparison of the total GICs flowing in the transformer windings

Name	Winding	GIC for northward E field (A/phase)	GIC for eastward E field (A/phase)	GIC for northward E field, HV only (A/phase)	GIC for eastward E field, HV only (A/phase)	GIC for northward E field (% diff.)	GIC for eastward E field (% diff.)
T2	HV	1.75	−6.94	1.65	−7.77	5.8	12.0
T5	Common	23.31	−18.25	21.89	−30.84	6.1	69.0
T6	HV	−9.55	59.09	−8.32	53.25	12.9	9.9
T7	HV	−9.55	59.09	−8.32	53.25	12.9	9.9
T8	HV	−27.67	−17.89	−28.80	−21.01	4.1	17.5
T9	HV	−27.67	−17.89	−28.80	−21.01	4.1	17.5
T10	HV	10.15	22.38	10.29	21.92	1.4	2.0
T11	HV	10.15	22.38	10.29	21.92	1.4	2.0
T12	Common	0.99	−8.64	3.30	−15.55	232.9	80.0
T13	HV	1.75	−6.94	1.65	−7.77	5.8	12.0
T14	Common	0.99	−8.64	3.30	−15.55	232.9	80.0
T15	Common	23.31	−18.25	21.89	−30.84	6.1	69.0

The table shows the comparison of the total GICs flowing in the transformer windings for the benchmark test case (Table VIII of Horton et al. 2012) when a northward or eastward uniform electric field of 1 V/km was present (first two columns after the column of names). The percent differences (% diff.) data are also shown. HV stands for high voltage.