Q.9 A 100 MVA,230V/115 kV A-A 3 phase power transformer has a per unit resistance of 0.02 pu and a per unit reactance of 0.055 pu. The transformer supplies a load of 80MVA at 0.85 pf lagging. What is the percent voltage regulation of the transformer?

Q.9 A 100 MVA,230V/115 kV A-A 3 phase power transformer has a per unit resistance of 0.02 pu and a per unit reactance of 0.055 pu. The transformer supplies a load of 80MVA at 0.85 pf lagging. What is the percent voltage regulation of the transformer?

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 3.32MCQ

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Concept explainers

Three-Phase Transformers

Three-segment transformers are a type of transformer used to transform voltages of electrical systems into three ranges. Two type transformers are shell-type transformer and core type transformer. In brief, it could be described because of the exquisite kinds of configurations.

Transformer

Ever since electricity has been created, people have started using it in its entirety. We see many types of Transformers in the neighborhoods. Some are smaller in size and some are very large. They are used according to their requirements. Many of us have seen the electrical transformer but they do not know what work they are engaged in.

Question

Q.9
A 100 MVA,230V/115 kV A-A 3 phase power
transformer has a per unit resistance of 0.02
pu and a per unit reactance of 0.055 pu. The
transformer supplies a load of 80MVA at
0.85 pf lagging. What is the percent voltage
regulation of the transformer?

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