A 300 MVA, 20kV three phase generator has a subtransient reactance of 20%. The generator supplies two synchronous motors over a 64km transmission line having transformers at both ends as shown on the single line diagram. The ratings of the motors are:M1-200MVA, 13.2kV, X”=20%; M2- 100MVA, 13.2kV, X”=20%. The ratings of transformers are T1-350MVA, 230/20 kV, X=10%; T2- composed of 3 single phase transformers each rated 127/ 13.2kV,100MVA, X=10%. Series reactance of the transmission line is 0.5 ohm/km. Draw the reactance diagram with all reactances marked in p.u. Select the generator ratings as base values.
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 300 MVA, 20kV three phase generator has a subtransient reactance of 20%.
The generator supplies two synchronous motors over a 64km transmission line
having transformers at both ends as shown on the single line diagram. The
ratings of the motors are:M1-200MVA, 13.2kV, X”=20%; M2- 100MVA,
13.2kV, X”=20%. The ratings of transformers are T1-350MVA, 230/20 kV,
X=10%; T2- composed of 3 single phase transformers each rated 127/
13.2kV,100MVA, X=10%. Series reactance of the transmission line is 0.5
ohm/km. Draw the reactance diagram with all reactances marked in p.u. Select
the generator ratings as base values.
Step by step
Solved in 2 steps with 1 images
