The one-line diagram of a power system is shown in the figure below. The 3-ph load is composed of three 4.8-N capacitors in delta connection. The motor draws 50 MW, 0.6 power factor lagging at 20 kV. Use a base of 100 MVA, 20 kV in the generator circuit. Determine the generator and motor internal emfs and the transmission line current. Line M 3-ph Load The three-phase power and line-line ratings are given below: X = 24% X = 6.4% X = 42.35 Q X = 22.5% G:80 MVA 22 kV 22/110 kV 110 kV T1:40 MVA Line: M: 68.85 MVA 20kV The three-phase ratings of the three-winding transformer T2 are: Y-connected 110 kV Primary: Secondary: Tertiary: 40 MVA, 25 MVA, Y-connected 22 kV A-connected 15 MVA, 4.4 kV Neglecting resistance, the leakage impedances are: Zps = 9.6% Zpt = 7.2% Zst = 10% 40 MVA, 40 MVA, 25 MVA, 110 kV 110 kV 22 kV
The one-line diagram of a power system is shown in the figure below. The 3-ph load is composed of three 4.8-N capacitors in delta connection. The motor draws 50 MW, 0.6 power factor lagging at 20 kV. Use a base of 100 MVA, 20 kV in the generator circuit. Determine the generator and motor internal emfs and the transmission line current. Line M 3-ph Load The three-phase power and line-line ratings are given below: X = 24% X = 6.4% X = 42.35 Q X = 22.5% G:80 MVA 22 kV 22/110 kV 110 kV T1:40 MVA Line: M: 68.85 MVA 20kV The three-phase ratings of the three-winding transformer T2 are: Y-connected 110 kV Primary: Secondary: Tertiary: 40 MVA, 25 MVA, Y-connected 22 kV A-connected 15 MVA, 4.4 kV Neglecting resistance, the leakage impedances are: Zps = 9.6% Zpt = 7.2% Zst = 10% 40 MVA, 40 MVA, 25 MVA, 110 kV 110 kV 22 kV
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 3.25P: Consider a single-phase electric system shown in Figure 3.33. Transformers are rated as follows:...
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