2. We are given a system involving a step transformer with the one-line diagram shown in Figure. 1. The transformer bank is made up of identical 10 transformers each specified by X1 = 0.21 2, n = N/NI = 10. Each generator phase is modeled by a Thevenin equivalent circuit. The transformer bank is delivering 100 MW at 0.9 PF lagging to a substation bus whose voltage is 230 kV (take this voltage as reference with an angle of zero) (a) Find the primary current, primary voltage (line-line), and 3Ø complex power supplied by the generator. (b) Find the phase shift between the primary and secondary voltages. To rest of system Generator A Y 230-kV bus Figure 1

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 3.11MCQ: For a short-circuit test on a 2-winding transformer, with one winding shorted, can you apply the...
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2. We are given a system involving a step transformer with the one-line diagram shown in Figure.
1. The transformer bank is made up of identical 10 transformers each specified by X1 = 0.21
2, n = N/NI = 10. Each generator phase is modeled by a Thevenin equivalent circuit. The
transformer bank is delivering 100 MW at 0.9 PF lagging to a substation bus whose voltage is
230 kV (take this voltage as reference with an angle of zero)
(a) Find the primary current, primary voltage (line-line), and 3Ø complex power supplied by
the generator.
(b) Find the phase shift between the primary and secondary voltages.
To rest
of system
Generator
A Y
230-kV
bus
Figure 1
Transcribed Image Text:2. We are given a system involving a step transformer with the one-line diagram shown in Figure. 1. The transformer bank is made up of identical 10 transformers each specified by X1 = 0.21 2, n = N/NI = 10. Each generator phase is modeled by a Thevenin equivalent circuit. The transformer bank is delivering 100 MW at 0.9 PF lagging to a substation bus whose voltage is 230 kV (take this voltage as reference with an angle of zero) (a) Find the primary current, primary voltage (line-line), and 3Ø complex power supplied by the generator. (b) Find the phase shift between the primary and secondary voltages. To rest of system Generator A Y 230-kV bus Figure 1
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