Q 2) The single-line diagram of a three-phase system is shown in Fig. 1. Using the common base Sp = 50 MVA, draw the impedance diagram in per unit including the load impedance. The manufacturer's nominal ratings are given as follows: Bus O Bus 2 Line 1 T1 T2 Line 2 Line 3 Bus 3 T3 Bus 4 Load Device Generator G,: 48 MVA 20 kV 20% Generator G,: 25 MVA 13.8 kV 15% Transformer T1: 50 MVA 20/110 kV 8% Transformer T2: 30 MVA 13.8/110 kV 6% Transformer T3: 50 MVA 11/110 kV 10% The three-phase load at bus 4 absorbs 60 MVA at 0.75 power factor (lagging), and lines 1, 2, and 3 have the reactance of 400, 32 0, and 300, respectively.
Q 2) The single-line diagram of a three-phase system is shown in Fig. 1. Using the common base Sp = 50 MVA, draw the impedance diagram in per unit including the load impedance. The manufacturer's nominal ratings are given as follows: Bus O Bus 2 Line 1 T1 T2 Line 2 Line 3 Bus 3 T3 Bus 4 Load Device Generator G,: 48 MVA 20 kV 20% Generator G,: 25 MVA 13.8 kV 15% Transformer T1: 50 MVA 20/110 kV 8% Transformer T2: 30 MVA 13.8/110 kV 6% Transformer T3: 50 MVA 11/110 kV 10% The three-phase load at bus 4 absorbs 60 MVA at 0.75 power factor (lagging), and lines 1, 2, and 3 have the reactance of 400, 32 0, and 300, respectively.
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.23P: Figure 3.32 shows the oneline diagram of a three-phase power system. By selecting a common base of...
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