A transmission line has equal voltages at the two ends, maintained constant by two sources. A third source is to be provided to maintain constant voltage (equal to end voltages) at either the midpoint of the line or at 75% of the distance from the sending end. Then the maximum power transfer capabilities of the line in the original case and the other two cases respectively will be in the following ratios.:

Steady state stability of a power system is the ability of the power system to

An alternator is connected to an infinite bus as shown in fig, It delivers 1.0p.u. current at 0.8pf lagging at

V=1.0 p.u. The reactance  of the alternator is 1.2p.u. Determine the active power output and the steady state power limit. Keeping the active power fixed, if the excitation is reduced, find the critical excitation corresponding to operation at stability limit.