×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*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.

Students Click Here

Jobs

Unit Transformer connected Synchronous motor

Unit Transformer connected Synchronous motor

Unit Transformer connected Synchronous motor

(OP)
We were having discussion on selection of nominal tap voltage rating for the unit transformers. In this context I thought we can benefit from the knowledge and experience of colleagues in this forum.
Synchronous motors can supply reactive power to the grid.
Even if these are not actually meant to support the grid voltage, at least they would not burden the system as they don't draw any VArs from the system.
That being the case, I think having unit transformer no-load voltage rating at nominal tap on secondary shall correspond to the motor rated voltage and not higher, i.e. to say 11kV (and not 11.5kV) in case motor rated voltage is 11kV.
Thanks in anticipation.

RE: Unit Transformer connected Synchronous motor

You are totally correct.  Use the nominal system and motor paramaters for the first "fire up" of the motor.  If operation leads you to another conclusion (var flow, instability) tou can always go back and change the tap accordingly.

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.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources