(Solved): Show that an alternator running in parallel on constant-voltage and frequency bus-bars has a natural ...

Show that an alternator running in parallel on constant-voltage and frequency bus-bars has a natural time period of oscillation. Deduce a formula for the time of one complete oscillation and calculate its value for a

-phase,

machine running at 1500 r.p.m. on constant

busbars. The moment of inertia of the whole moving system is

and the steady short-circuit current is five times the normal full-load value. [1.33 second]