A transformer of 100MVA, 60Hz, 138/69 kV, works as step down, has the following parameters: r1 = 0,06 ohm; XL1 = 0,08 ohm; r2 = 0,03 ohm; XL2 = 0,04 ohm. When the transformer is at rated load and assuming that the voltage at the terminals and the induced voltages are in phase, calculate:

A transformer of 100MVA, 60Hz, 138/69 kV, works as step down, has the following parameters: r1 = 0,06 ohm; XL1 = 0,08 ohm; r2 = 0,03 ohm; XL2 = 0,04 ohm. When the transformer is at rated load and assuming that the voltage at the terminals and the induced voltages are in phase, calculate:

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 3.17P: The transformer of Problem 3.16 is supplying a rated load of 50 kVA at a rated secondary voltage of...

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Question

A transformer of 100MVA, 60Hz, 138/69 kV, works as step down, has the following parameters: r1 = 0,06 ohm; XL1 = 0,08 ohm; r2 = 0,03 ohm; XL2 = 0,04 ohm. When the transformer is at rated load and assuming that the voltage at the terminals and the induced voltages are in phase, calculate:
- The relation between the primary and secondary induced electromotive force (emf) and between respective terminal voltages.
- Explain the results obtained.

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