×
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

Voltage drop compensation

Voltage drop compensation

Voltage drop compensation

(OP)
Hi there,
I have to design a 11kV voltage drop compesator to balance 3 loads in a circuit.
Previously, I had calculated very easily this problem because I had only 2 loads so I used voltage divider rule to obtain the balance point so the 2 loads were in an equilibrium however, now the company want to add a 3rd load 3km away from the transformer and they asked me where is the balance point to install the voltage drop compensator. I know the lengths of 3 cables and the loads so I have tried to calculate mathematically the equilibrium distance between them with no luck because I dont know the angle and the voltage phase is independent to the physical angle between the loads and transformer locations (see attached notes). Please, couls you send me examples or explain how can I obtain this balance point. I need help urgently!

RE: Voltage drop compensation

I think, at first, actually the load is supplied through a transformer-primary 11 kV but secondary it is a low voltage [400-690 V].
Second, what do you need it is the voltage drop -I think. It is a very simply task for an electrical engineer.
What I would I have to recommend is don't do it alone but go to find a good electrical engineer to do the job.
In my opinion you intend to employ a device like the following:
https://library.e.abb.com/public/3ea66025b0b7686ac...

RE: Voltage drop compensation

First resolve the current drawn by each load into real components and reactive components.
Add the real components and the reactive components to get the total real current and total reactive current on the transformer.
Use this value to calculate the voltage drop on the transformer terminals.
Now use calculate the voltage drop on each feeder, and the voltage supplied to each load.
Take the average of the load voltages and compare with the desired voltage.
Adjust the supply voltage to get a happy medium.
Re-check your figures.
Note, it is not always possible to determine a suitable operating point when faced with one control of the voltages across three different voltage drops.
Your problem may not be solvable with one voltage regulator.
That is, you may end up with a voltage that is higher than desired at one load while the voltage is lower than desired at another load.

Bill
--------------------
"Why not the best?"
Jimmy Carter

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