Question

Floating of synchronous machine on infinite bus means ___________

(a) Fa = 0 and machine neither generator nor motor

(b) Fa is not zero and machine neither generator nor motor

(c) Fa = 0 and machine is not excited

(d) frequency is zero

I had been asked this question in an interview for job.

This interesting question is from Physical Concepts of Synchronous Machine Operation in section Synchronous Machines of Electrical Machines

Answer 1

Right option is (a) Fa = 0 and machine neither generator nor motor

To elaborate: Floating means the armature flux is zero and it neither motoring nor generating.