Exam Question

(a) Derive an expression for the emf induced in an a.c. generator (6)

(b) A 3000 KVA, 6-pole alternator runs at 1000 r.p.m. in parallel with other machines on 3300 V bus-bars. The synchronous reactance is 25%. Calculate the synchronizing power for one mechanical degree of displacement and the corresponding synchronizing torque (10)