A three-phase generator step-up transformer i
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.
A three-phase generator step-up transformer is rated 1000 MVA, 13.8 kV A/345 kV Y with
Zeq = j0.10 pu. The transformer high-voltage winding has ±10% taps. The system base quantities
are:
SB = 500 MVA
VB = 345 kV
Determine the per-unit equivalent circuit for the following tap settings:
a) rated tap
b) +10% tap (providing a 10% voltage increase for the high-voltage winding)
Assume balanced positive-sequence operation. Neglect transformer winding resistance, exciting current and phase shift.
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