A 3-phase generator has positive, negative, and zero-sequence reactance's of 0.30, 0.20, and 0.05 p.u. respectively. The generator is connected to a three-phase transformer Delta-Wye grounded with positive and negative sequence reactance of 0.10 p.u. and zero sequence reactance equal to 0.20 p.u. The transformer is connected to a transmission line having positive and negative sequence reactance of 10% and a zero-sequence reactance of 35%. The transmission line is connected to another Wye-Delta transformer and then to a three-phase load with each branch impedance being j1.0 and the neutral is grounded through a reactance of j1.0. A single line-to-line fault occurs at the end of the transmission line on phases B and C. a. Draw the sequence networks b. Compute the Sequence currents c. Compute the faulted phase currents
A 3-phase generator has positive, negative, and zero-sequence reactance's of 0.30, 0.20, and 0.05 p.u. respectively. The generator is connected to a three-phase transformer Delta-Wye grounded with positive and negative sequence reactance of 0.10 p.u. and zero sequence reactance equal to 0.20 p.u. The transformer is connected to a transmission line having positive and negative sequence reactance of 10% and a zero-sequence reactance of 35%. The transmission line is connected to another Wye-Delta transformer and then to a three-phase load with each branch impedance being j1.0 and the neutral is grounded through a reactance of j1.0. A single line-to-line fault occurs at the end of the transmission line on phases B and C. a. Draw the sequence networks b. Compute the Sequence currents c. Compute the faulted phase currents
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 3.31P
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