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Problem 2 (10 pts) 132 kV TL 40 km 1 pu mid-point L-E fault 60 ΛΤΑ TL: Transmission line. L-E fault: Line-to-earth fault. Z.

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Generator Z 0.1 p.u Z2 0.07 p.u Transformer: Z Z, Z 0.1 p.u Transmission line: Z, Z, 0.7 O/km=0.7x40=28 Q Zo 2.5x Z 2.5 x 280.1 0.0482 0.0482 0.1 2 T/L Draw the negative sequence circuit diagram 0.1 0.0482 0.0482 0.1 T, 0.07 G N Zeg 0.07 0.1+0.04820.1 0.1205 0.1205 0.1 Tr 3X 0 G Z 0.1 0.1205 0.2205 p.u (a) Calculate the fault current 3E I f leg 2eg 0eg 3x1.0 0.2482 0.218b) Vf Impedance at point P If 0 1.1461 =0 0 As impedance at point P is zero, it is independent of the generator source impeda

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Problem 2 (10 pts) 132 kV TL 40 km 1 pu mid-point L-E fault 60 ΛΤΑ TL: Transmission line. L-E fault: Line-to-earth fault. Z. 0.07 pu 0.1 pu Generator 0.1 pu 0.1 pu 0.1 pu Transformers 2.5x Z] Transmi...
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