Consider a simple power system consisting of an ideal voltage source, an ideal step-up transformer, a ransmission line, an ideal step-down transformer, and a load. The voltage of the source is V, = 480/0° V . The impedance of the transmission line is Z = 3+ j4 N, and the impedance of the oad is Zg = 30 + j40 n. a) Assume that the transformers are not present in the circuit. What is the load voltage and efficiency of the system? b) Assume that transformer 1 is a 1:5 step-up transformer, and transformer 2 is a 5:1 step-down transformer. What is the load voltage and efficiency of the system? c) What transformer turns ratio would be required to reduce the transmission line losses to 1% of the

Consider a simple power system consisting of an ideal voltage source, an ideal step-up transformer, a ransmission line, an ideal step-down transformer, and a load. The voltage of the source is V, = 480/0° V . The impedance of the transmission line is Z = 3+ j4 N, and the impedance of the oad is Zg = 30 + j40 n. a) Assume that the transformers are not present in the circuit. What is the load voltage and efficiency of the system? b) Assume that transformer 1 is a 1:5 step-up transformer, and transformer 2 is a 5:1 step-down transformer. What is the load voltage and efficiency of the system? c) What transformer turns ratio would be required to reduce the transmission line losses to 1% of the

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 3.34MCQ: Consider Figure 3.25 of the text for a transformer with off-nominal turns ratio. (i) The per-unit...

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