Question

If it is planned to bring an incoming alternator to the operating alternator in parallel, then which of the criteria can be ignored?

(a) Prime mover speed

(b) Voltage magnitude

(c) Frequency

(d) Phase sequence of the alternator

I have been asked this question by my college professor while I was bunking the class.

My question is based upon Synchronous Machine Stability topic in chapter Synchronous Machine Stability of Electrical Machines

Answer 1

Correct option is (a) Prime mover speed

To explain: To operate under synchronising conditions, there must be same voltage, frequency and phase sequence for the machines in the parallel.