From Example 2.1 the maximum diversified kW demands were computed. Using the 0.9 lagging power factor, the maximum diversified kW and kVA demands for the line segments and transformers are Segment N1-N2: P12 = 92.8 kW S12 = 92.8 + j45.0 kVA S3 = 72.6 + j35.2 kVA Su = 48.9 + j23.7 kVA S = 30.3 + j14.7 kVA Segment N2-N3: P23 = 72.6 kW %3D Segment N3-N4: P4 = 48.9 kW Transformer T1: P = 30.3 kW %3D Transformer T2: Pr2 = 35.5 kW S2 = 35.5 + j17.2 kVA %3D Transformer T3: Pr3 = 48.9 kW ST3 = 48.9 + j23.7 kVA %3!

From Example 2.1 the maximum diversified kW demands were computed. Using the 0.9 lagging power factor, the maximum diversified kW and kVA demands for the line segments and transformers are Segment N1-N2: P12 = 92.8 kW S12 = 92.8 + j45.0 kVA S3 = 72.6 + j35.2 kVA Su = 48.9 + j23.7 kVA S = 30.3 + j14.7 kVA Segment N2-N3: P23 = 72.6 kW %3D Segment N3-N4: P4 = 48.9 kW Transformer T1: P = 30.3 kW %3D Transformer T2: Pr2 = 35.5 kW S2 = 35.5 + j17.2 kVA %3D Transformer T3: Pr3 = 48.9 kW ST3 = 48.9 + j23.7 kVA %3!

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 3.29P: Consider three ideal single-phase transformers (with a voltage gain of ) put together as ...

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Consider three ideal single-phase transformers (with a voltage gain of ) put together as three-phase bank as shown in Figure 3.35. Assuming positive-sequence voltages for Va,Vb, and Vc find Va,Vb, and VC. in terms of Va,Vb, and Vc, respectively. (a) Would such relationships hold for the line voltages as well? (b) Looking into the current relationships, express IaIb and Ic in terms of IaIb and Ic respectively. (C) Let S and S be the per-phase complex power output and input. respectively. Find S in terms of S.
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