Two generators are connected in parallel to the low voltage side of a transformer. Generators Gl and G 2 are each rated at 50 MVA, 13.8 kV, with a subtransient resistance of 0.2 pu. Transformer T1 is rated at 100 MVA, 13.8/115 kV with a series reactance of 0.08 pu and negligible resistance. Assume that initially the voltage on the high side of the transformer is 120 kV, that the transformer is unloaded, and that there are no circulating currents between the generators. Calculate the subtransient fault current that will flow if a 3 phase fault occurs at the high-voltage side of transformer 美。 AY G, ratings: sÓ MVA G2 ratings: 50 MVA T, ratings: 100 MVA 13.8/11 3AV X - 0.08 pu 13.8 AV 13.8 AV X"- 0.20 pu X"- 0.20 pu

Two generators are connected in parallel to the low voltage side of a transformer. Generators Gl and G 2 are each rated at 50 MVA, 13.8 kV, with a subtransient resistance of 0.2 pu. Transformer T1 is rated at 100 MVA, 13.8/115 kV with a series reactance of 0.08 pu and negligible resistance. Assume that initially the voltage on the high side of the transformer is 120 kV, that the transformer is unloaded, and that there are no circulating currents between the generators. Calculate the subtransient fault current that will flow if a 3 phase fault occurs at the high-voltage side of transformer 美。 AY G, ratings: sÓ MVA G2 ratings: 50 MVA T, ratings: 100 MVA 13.8/11 3AV X - 0.08 pu 13.8 AV 13.8 AV X"- 0.20 pu X"- 0.20 pu

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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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

Two generators are connected in parallel to the low voltage side of a
transformer. Generators G1 and G 2 are each rated at 50 MVA, 13.8 kV,
with a subtransient resistance of 0.2 pu. Transformer T1 is rated at 100
MVA, 13.8/115 kV with a series reactance of 0.08 pu and negligible
resistance. Assume that initially the voltage on the high side of the
transformer is 120 kV, that the transformer is unloaded, and that there are
no circulating currents between the generators. Calculate the subtransient
fault current that will flow if a 3 phase fault occurs at the high-voltage
side of transformer
AY
Gz ratings:
50 MVA
G, ratings:
số MVA
13.8 KV
X" = 0.20 pu
T, ratings:
100 MVA
13.8/113 V
X - 0.08 pu
13.8 KV
X" - 0.20 pu
Choose the per-unit base values for this power system to be 100 MVA
and 13.8 kV

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