3) As shown in Fig. 1, a balanced three-phase, positive-sequence source with VAB = 480/0° V is applied to an unbalanced A load. Note that one leg of the A is open. Determine: a) the load currents IAB and IBC; b) the line currents IA, IB and IC which feed the A load; c) the zero-, positive, and negative-sequence components of the line currents Le LA V=480/0° V

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
Chapter2: Fundamentals
Section: Chapter Questions
Problem 2.52P: A balanced three-phase load is connected to a 4.16-kV, three-phase, fourwire, grounded-wye dedicated...
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3) As shown in Fig. 1, a balanced three-phase, positive-sequence source with VAB = 480/0° V is
applied to an unbalanced A load. Note that one leg of the A is open. Determine:
a) the load currents IAB and IBC;
b) the line currents IA, IB and Ic which feed the A load;
c) the zero-, positive, and negative-sequence components of the line currents
lc
LA
B
VAB=480 0° V
(18+/10) 2
3=
Figure 1: Problem 3
A
wo
G₁
500 MVA, 13.8 kV, x=2=0.20, 0 = 0.10 pu
G₂: 750 MVA, 18 kV, 2= 2 = 0.18,20 = 0.09 pu
G3: 1000 MVA, 20 kV, 20.17, 22 = 0.20, 0 = 0.09 pu
T₁: 500 MVA, 13.8/500 kV, A-Y, * = 0.12 pu
T₂: 750 MVA, 18/500 kV, A-Y, x = 0.10 pu
T3: 1000 MVA, 20/500 kV, A-Y, 2=0.10 pu
Each Line: X₁ = 50 , Xo = 150
Transcribed Image Text:3) As shown in Fig. 1, a balanced three-phase, positive-sequence source with VAB = 480/0° V is applied to an unbalanced A load. Note that one leg of the A is open. Determine: a) the load currents IAB and IBC; b) the line currents IA, IB and Ic which feed the A load; c) the zero-, positive, and negative-sequence components of the line currents lc LA B VAB=480 0° V (18+/10) 2 3= Figure 1: Problem 3 A wo G₁ 500 MVA, 13.8 kV, x=2=0.20, 0 = 0.10 pu G₂: 750 MVA, 18 kV, 2= 2 = 0.18,20 = 0.09 pu G3: 1000 MVA, 20 kV, 20.17, 22 = 0.20, 0 = 0.09 pu T₁: 500 MVA, 13.8/500 kV, A-Y, * = 0.12 pu T₂: 750 MVA, 18/500 kV, A-Y, x = 0.10 pu T3: 1000 MVA, 20/500 kV, A-Y, 2=0.10 pu Each Line: X₁ = 50 , Xo = 150
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