ring distributor

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 3.43P: Three single-phase transformers, each rated 10MVA,66.4/12.5kV,60Hz, with an equivalent series...
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3. A 3-phase ring distributor ABCDA, fed at A at 11 kV supplies balanced loads of 30 A at 0.8
pf lagging at B, 50 A at 0.707 pf lagging at C, and 40 A at 0.8 pf lagging at D. The load
currents are referred to the supply voltage at A. The impedances per phase of the various
sections are:
Section AB = (3+j4) ohms Section BC = (1+j1) ohms
Section CD = (2+j3) ohms Section DA = (1+j2) ohms
Calculate the currents in sections: AB and BC, and station bus-bar voltages per phase at
B, and C.
Transcribed Image Text:3. A 3-phase ring distributor ABCDA, fed at A at 11 kV supplies balanced loads of 30 A at 0.8 pf lagging at B, 50 A at 0.707 pf lagging at C, and 40 A at 0.8 pf lagging at D. The load currents are referred to the supply voltage at A. The impedances per phase of the various sections are: Section AB = (3+j4) ohms Section BC = (1+j1) ohms Section CD = (2+j3) ohms Section DA = (1+j2) ohms Calculate the currents in sections: AB and BC, and station bus-bar voltages per phase at B, and C.
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