I. Z The three-phase circuit shown in Figure 1 is composed of a balanced three-phase A-connected voltage source with Vab519.62|60° V having a phase sequence of abc. A balanced three-phase A-connected load impedances of Za=21+j36 Q per phase, and line impedances of Zi = 0.5 + j Q per phase. a) Transform the A-A connected circuit to Y-Y connected circuit, and write the values of the circuit elements. b) Draw the single-phase equivalent circuit of the Y-Y connected circuit, and write the values of the circuit elements. c) Calculate the line current I,. Write the phasor expressions of I, and I. LIB b B Isc Za Figure 1

I. Z The three-phase circuit shown in Figure 1 is composed of a balanced three-phase A-connected voltage source with Vab519.62|60° V having a phase sequence of abc. A balanced three-phase A-connected load impedances of Za=21+j36 Q per phase, and line impedances of Zi = 0.5 + j Q per phase. a) Transform the A-A connected circuit to Y-Y connected circuit, and write the values of the circuit elements. b) Draw the single-phase equivalent circuit of the Y-Y connected circuit, and write the values of the circuit elements. c) Calculate the line current I,. Write the phasor expressions of I, and I. LIB b B Isc Za 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 3.36P: Three single-phase two-winding transformers, each rated 25MVA,34.5/13.8kV, are connected to form a...

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