An 11 kV generating station has four identical 3-phase alternators Gl, G2, G3 and G4 each of L0 MVA capacity and l2%o reaclarce. There are two section of bus-bar P and Q, linked by a reactor X rated at 10 MVA with 24o/oreactance. From section Q load is taken through a 6 MVA, i 1kV/66kV step-up transformer (T1) having a reactance of 37o. Determine the fault current if a three-phase short-circuit occurs near the high voltage terminal of the transformer (F) as shown in Figure. Assume prefault voltages to be 1 pu and prefault currents to be zero
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.
An 11 kV generating station has four identical 3-phase alternators
Gl, G2, G3 and G4 each of L0 MVA capacity and l2%o reaclarce.
There are two section of bus-bar P and Q, linked by a reactor X rated
at 10 MVA with 24o/oreactance. From section Q load is taken through
a 6 MVA, i 1kV/66kV step-up transformer (T1) having a reactance of
37o. Determine the fault current if a three-phase short-circuit occurs
near the high voltage terminal of the transformer (F) as shown in
Figure.
Assume prefault voltages to be 1 pu and prefault currents to be zero
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
