Correct Answer - Option 1 : j 0.5
Concept:
Steady-state power limit is defined as, \(\frac{{EV}}{{{X_d}}}\)
Where E = infinite bus voltage.
V = synchronous machine voltage
Xd = transfer reactance between generator and infinite bus
Calculation:
Given that, E = 1pu, V = 1.1 pu
Steady state stability = 2.2 pu
\({X_d} = \frac{{EV}}{{SSSL}} = \frac{{1\; \times \;1.1}}{{2.2}} = 0.5\)
Hence, transfer reactance is j 0.5