Identification of Critical Nodes and Accident Chains of Power Systems under the Effect of Geomagnetic Storms

Table 1

GIC of substations under the action of geoelectric fields of different strengths.

Name	Eastward E field GIC (A)
	E = 1 V/km	E = 3 V/km	E = 5 V/km	E = 9 V/km
SUB1	−7.529	−22.588	−37.647	−67.764
SUB2	−7.616	−22.849	−38.082	−68.547
SUB3	7.366	22.097	36.829	66.292
SUB4	−1.435	−4.305	−7.176	−12.916
SUB5	−2.006	−6.017	−10.027	−18.049
SUB6	1.967	5.899	9.832	17.698
SUB7	−5.374	−16.123	−26.871	−48.368
SUB8	−5.570	−16.709	−27.849	−50.127
SUB9	−0.060	−0.181	−0.302	−0.544
SUB10	3.610	10.829	18.049	32.487
SUB11	2.855	8.566	14.277	25.698
SUB12	−7.893	−23.679	−39.464	−71.036
SUB13	−0.367	−1.101	−1.835	−3.303
SUB14	0.000	0.000	0.000	0.000
SUB15	6.395	19.184	31.974	57.552
SUB16	0.499	1.497	2.494	4.489
SUB17	2.389	7.166	11.944	21.499
SUB18	5.437	16.311	27.185	48.934
SUB19	2.151	6.454	10.756	19.361
SUB20	5.183	15.548	25.913	46.643