engineering recuitment GATE EE 2023-24 Test Series Power Systems PU System and Symmetrical Components Symmetrical Networks
A generator is connected to a transformer which feeds another transformer through a short feeder. The zero sequence impedance values are expressed in pu on a common base and are indicated in the figure. The Thevenin’s equivalent zero sequence impedance at point B is
1
0.75 + j0.22
2
0.22 + j0.75
3
0.56 + j2.26
4
1.5 + j0.25