Bus 2 DFW Bus 5 VAL Bus 3 UT Bus 1 HOU Bus 7 WIND Bus 4 SA Bus 6 COAL 300 km 250 km 150 km 400 km 500 km Bus 3 UT Bus 1 HOU Bus 7 WIND Bus 4 SA Summer Peak, 3 kW per person, 20 million people, 60 GW Winter Peak, 80% of Summer Peak Spring/Fall Peak, 50% of Summer Peak Nightime, 50% of Daily Peak Approx 5% losses No Wind (Good Wind) Bus 6 COAL BUS LOAD % OF TOTAL GEN % OF TOTAL 1, HOU 30% 45% 2, DFW 25% 15% ( 10%) 3, UT 5% 4, SA 20% 10% 5, VAL 6, COAL 15% ( 5%) 7, WIND 5% ( 20%) Positive-sequence line constants for each 345kV circuit: R = 0.06 Ω/km per conductor L = 1 µH/m C = 12 pF/m Rating = 800 A per conductor