×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

#### Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

# Generator field saturation

## Generator field saturation

(OP)
If a generator field saturates power output decreases this at the same time  increases steam flow to turbine without changing steam pressure profile in turbine. i would like to know in detail , what would be the quantity of power loss and how to calculate it. please give in detail how to calculate power consumption due to field.

### RE: Generator field saturation

Pstatorwinding=Ms x Rs x |Is|**2 Loss of Stator Power in watts
where
|Is|=(Xms x Ns' x Ef)/[(XLs + Xms) x Rf] is stator current in Amps
Ef rotor field voltage in Volts
Rf rotor field resistance in Ohms
XLs is stator leakage reactance << Xms in Ohms
Xms is stator magnetizing reactance in Ohms
Ns' = 3 x Nr/(sqrt2 x Ms x Ns)
Ms is number of stator phases
Nr number of rotor turns
Ns number of stator turns

### RE: Generator field saturation

hey S, I think you got things mixed up.

the dc field in a syn. gen. does not "saturate", however the ac core saturates and this limits the voltage induced in the armature winding by the field.

Second, changing excitation (magnetization) levels in a synch. generator changes Var generation not Power generation.  Only the steam turbine governor can change Power output of the generator.

Now changing Vars loading will change the losses in the generator(stator core loss, armature loss, stray load loss) but these losses are small compared to the power output in any well designed generator.

### RE: Generator field saturation

It will not reduce the out put.THe change in the field excitation is only conncted to the reactive power.There by only the voltage will change if it is running in solo or the power factor will change if it is running in paralell.The active power will not get changed and it is enterly depends on the steam flow and the governertrottling if it is in parallel with grid or another gen.Or the amount of load it is impoed on.

#### Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

#### Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

#### Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a partâ€™s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

# Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!