Question: A ( 2 0 - mathrm { MVA } , 6 . 6 - mathrm { kV } , 3 )

A \(20-\mathrm{MVA},6.6-\mathrm{kV},3\)-phase alternator is connected to a 3-phase transmission line. The per unit positive sequence, negative sequence and zero sequence impedances of the alternator are j 0.1, and j 0.04 respectively. The neutral of the alternator is connected to ground through an inductive reactor of j0.05 p.u. The per unit positive, negative and zero sequence impedances of the transmission line are j0.1 and j0.3 respectively. All per unit values are based on the machine ratings. A solid ground fault occurs at one phase of the far end of the transmission line. What will be the voltage of the alternator neutral with respect to ground during the fault?
A \ ( 2 0 - \ mathrm { MVA } , 6 . 6 - \ mathrm {

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