Question
Download Solution PDFIn the wind power plant, which of the following features differentiates the wound rotor synchronous generator from squirrel cage induction generators?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe feature that differentiates the wound rotor synchronous generator from squirrel cage induction generators is:
The wound rotor synchronous generator includes an external mechanism to control the rotor output. In a wound rotor synchronous generator, the rotor windings are accessible and can be connected to external resistors or other control devices, allowing for external control of the rotor circuit. This feature provides additional control over the generator's performance, which is not typically found in squirrel cage induction generators.
Difference between wound rotor synchronous generators from squirrel cage induction generators
|
Parameter |
Wound rotor synchronous generator |
Squirrel cage induction generators |
|
Supply System |
Its armature winding is energized from an AC source and its field winding from a DC source. |
Its stator winding is energized by an AC source. |
|
Types of Excitation |
A synchronous motor is a doubly excited machine. |
An induction motor is a single-excited machine. |
|
Starting Mechanism |
It is not self-starting. It has to be run up to synchronous speed by any means before it can be synchronized to AC supply. |
An induction motor has self-starting torque. |
|
Operation |
A synchronous motor operates with lagging and leading power by changing its excitation. |
An induction motor operates only at a lagging power factor. At high loads, the power factor becomes very poor. |
|
Efficiency |
It is more efficient than an induction motor of the same output and voltage rating. |
Its efficiency is lesser than that of the synchronous motor of the same output and the voltage rating. |
Last updated on May 29, 2025
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