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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

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

Power System Analysis and Design (MindTap Course List)
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
Chapter6: Power Flows
Section: Chapter Questions
Problem 6.58P
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answer num 5 but use num 3 as reference

5. In problem # 3, if there will be an interconnector between A and C, what must be its impedance (magnitude and angle) so that the new station bus-bar voltage at C will be 6212.805/-0.568° V?
Transcribed Image Text:5. In problem # 3, if there will be an interconnector between A and C, what must be its impedance (magnitude and angle) so that the new station bus-bar voltage at C will be 6212.805/-0.568° V?
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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