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1. The line currents in a 3-ph 4 -wire system are I, = 100<30°; I, = 50<300"; I. = 30<180°. Find the symmetrical components and the neutral current.

1. The line currents in a 3-ph 4 -wire system are I, = 100<30°; I, = 50<300"; I. = 30<180°. Find the symmetrical components and the neutral current.

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
Chapter4: Transmission Line Parameters
Section: Chapter Questions
Problem 4.1P: The Aluminum Electrical Conductor Handbook lists a dc resistance of 0.01558 ohm per 1000 ft at 20C...
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Exercises on Symmetrical Components 1. The line currents in a 3-ph 4 –wire system are l, = 100<30; I, = 50<300"; I, = 30<180°. Find the symmetrical components and the neutral current. 2. The sequencec component voltages of phasc voltages of a 3-ph system arc: Van = 100 <0° v; Va = 223.6 <-26.6" V: V = 100 <180" V. Detemine the phase voltages. 3. The two seq. components and the corresponding phase voltage of a 3-ph system are V,0 =1<-60° V; V,-2<0"V ; & Va = 3 <0°V. Determine the other phase voltages. 4. Determine the sequence components if I, =10<60° A; I, =10<-60° A; Ic = 10<180° A. 5. The line b of a 3-ph line feeding a balanced Y-load with neutral grounded is open resulting in line currents: I, = 10-0" A & I, = 10<120° A. Determine the sequence current components. 6. One conductor of a 3-ph line feeding a balanced delta-load is open. Assuming that line c is open, if current in line a is 10<0" A, determine the sequence components of the line currents 7. Given Va S253°, V= 72-164°, V.= 7210s°, find the symmetrical components. The phase components are shown in the phasor form below Va 105 164 Unbalanced condition 8. Given Vo -3,5 4 122", Vi- 5.0 2-10", V2- 1.9 292°, find the phase sequence components II
Transcribed Image Text:Exercises on Symmetrical Components 1. The line currents in a 3-ph 4 –wire system are l, = 100<30; I, = 50<300"; I, = 30<180°. Find the symmetrical components and the neutral current. 2. The sequencec component voltages of phasc voltages of a 3-ph system arc: Van = 100 <0° v; Va = 223.6 <-26.6" V: V = 100 <180" V. Detemine the phase voltages. 3. The two seq. components and the corresponding phase voltage of a 3-ph system are V,0 =1<-60° V; V,-2<0"V ; & Va = 3 <0°V. Determine the other phase voltages. 4. Determine the sequence components if I, =10<60° A; I, =10<-60° A; Ic = 10<180° A. 5. The line b of a 3-ph line feeding a balanced Y-load with neutral grounded is open resulting in line currents: I, = 10-0" A & I, = 10<120° A. Determine the sequence current components. 6. One conductor of a 3-ph line feeding a balanced delta-load is open. Assuming that line c is open, if current in line a is 10<0" A, determine the sequence components of the line currents 7. Given Va S253°, V= 72-164°, V.= 7210s°, find the symmetrical components. The phase components are shown in the phasor form below Va 105 164 Unbalanced condition 8. Given Vo -3,5 4 122", Vi- 5.0 2-10", V2- 1.9 292°, find the phase sequence components II
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