1 answer

The three-phase power and line-line ratings of the electric power system shown in Figure 2 are...

Question:

The three-phase power and line-line ratings of the electric power system shown in Figure 2 are given below. T1 T2 V. 1 2 vm 9

The three-phase power and line-line ratings of the electric power system shown in Figure 2 are given below. T1 T2 V. 1 2 vm 9 Line G M Figure 2 One-line diagram for problem 2 G: T1: 60 MVA 50 MVA 50 MVA T2: Line: M: 20 kV 20/200 kV 200/20 kV 200 kV 18 kV X=9% X=10% X=10% Z=120+j200 12 X=8% 43.2 MVA (a) Draw an impedance diagram showing all impedances in per unit on a 100-MVA base. Choose 20 kV as the voltage base for the generator. (b) The motor is drawing 45 MVA, 0.8 power factor lagging at a line-to-line terminal voltage of 18 kV. Determine the terminal voltage and the internal emf of the generator in per unit and in kV.

Answers

c@ old albare a hase, new New MVA base old MrA base Hg x(pu) * 100 0.09 X *(20)2 = 0.15pice. old ngase ken New MV Abase old MTerminal voltage (phase-to-neutral) of the most generator Vegna = Temput Im ( jxz, + Zine + jx, =2_0446.28876-36-87) (30.246

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