LOADING
Question

 For which of the following the excitation control method is satisfactory? 

A.

High voltage lines

B.

Short line


C.

Long line

D.

Low voltage lines

Answer ( Option D)

Low voltage lines

Solution

When the load On the supply changes, The terminal voltage of alternator also varies due to changed voltage drop in the synchronous reactance of armature. The voltage of the alternator can be kept constant by changing the field current of alternator in accordance with the load. The excitation control method is satisfactory only for relatively short transmission lines. It is not suitable for long lines as the voltage at the alternator terminals will have to be V.

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