3. The three phase power and line-line ratings of the electric power system shown in Fig....

 

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3. The three phase power and line-line ratings of the electric power system shown in Fig. 3 are given below. G Vg G1 : T1 : T2 : T1 1 60 MVA 50 MVA 50 MVA 43.2 MVA Line Fig. 3 20 kV 20/200 kV 200/20 kV 18 kV 2 X = 9% X = 10% X = 10% M: X = 8% Line 200 kV Z = 120 + j200 a) Draw an impedance diagram showing all impedances in per unit on a 100 MVA base. Choose 20 kV as the voltage base for generator. T2 M b) The motor is drawing 45 MVA, 0.8 power factor lagging at a line-line terminal voltage of 18 kv. Determine the terminal voltage and the internal emf of the generator in per unit and in kv. 3. The three phase power and line-line ratings of the electric power system shown in Fig. 3 are given below. G Vg G1 : T1 : T2 : T1 1 60 MVA 50 MVA 50 MVA 43.2 MVA Line Fig. 3 20 kV 20/200 kV 200/20 kV 18 kV 2 X = 9% X = 10% X = 10% M: X = 8% Line 200 kV Z = 120 + j200 a) Draw an impedance diagram showing all impedances in per unit on a 100 MVA base. Choose 20 kV as the voltage base for generator. T2 M b) The motor is drawing 45 MVA, 0.8 power factor lagging at a line-line terminal voltage of 18 kv. Determine the terminal voltage and the internal emf of the generator in per unit and in kv.

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