Question: Table Q1 MVA KV X (pu) X (pu) X (pu) X/pu) Iyound System Component Generator G1 Generator G2 Generator G Transformer T Transformer T2 Transformer T3 Each Line 0.2 0.18 0.17 0.028 2 500 750 1000 500 750 1000 13.8 18 20 13.8/500 Y 184/500 Y 20A/500 Y 0.12 0.18 0.17 0.12 0.10 0.10 50 82 0.12 0.10 0.10 5022 0.10 0.09 0.09 0.12 0.10 0.10 150 22 Al T3 G3 …

Table Q1 MVA kV X (pu) X (pu) X (pu) X/pu) Iyound System Component Generator G1 Generator G2 Generator G Transformer T Transformer T2 Transformer T3 Each line 0.2 0.18 0.17 0.028 2 500 750 1000 500 750 1000 13.8 18 20 13.8/500 Y 184/500 Y 20A/500 Y 0.12 0.18 0.17 0.12 0.10 0.10 50 82 0.12 0.10 0.10 5022 0.10 0.09 0.09 0.12 0.10 0.10 150 22 al T3 G3 3 Line 2 2100 이 G1 T1 Line 1 oot YA T2 G2 4 Line 3 T0–OY ΠΔ Figure Q1 Assume that the prefault voltage is 1.0 per unit and prefault current is neglected. 1) Find all the positive, negative and zero sequence parameters value in per unit on a 1000 MVA, 20 kV base in the zone of generator G- i) Draw the positive, negative and zero sequence network diagram. Write all the parameters values on the sequence network If a single line to ground fault occurs at Bus 3, find the subtransient fault curent in ampere. 1V) If the Y connection of transformer T, is grounded, repeat part (11) 11)