×
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

Radial Network Voltage Profile

Radial Network Voltage Profile

Radial Network Voltage Profile

(OP)
Hi,

In a radial network, we can analyze it as a series circuit. The voltage decreases towards the load is due to the reactances along the lines and transformer which requires reactive power. Is there any other factors that contribute to the voltage decrease? Thanks.  

RE: Radial Network Voltage Profile

How about some of these:
- the loads and load distribution along the circuit
- the line voltage
- the conductor sizes
- the types of conductors (overhead versus underground cable)
- distances
- presence of capacitor banks
- presence of voltage regulators

RE: Radial Network Voltage Profile

(OP)
In my simulation there are no conductor size and types of conductors modelled. The line voltage has caught my attention. How the magnitude of line voltage affects the voltage drop across radial network? Can higher voltage transmission increase the voltage stability?

The presence of capacitor banks and voltage regulators (transformer) are supposed to help the network voltage stability. What I am thinking now is the cause of voltage decrease.

RE: Radial Network Voltage Profile

The dominant effect on the voltage profile is the load current.  Forget the transformers unless it's at light load; they will be an insignificant contribution to the load current.  Normally the load current is at a lagging power factor.  Have you looked at a voltage profile for a lagging power factor?

Sounds like a student posting.

RE: Radial Network Voltage Profile

What makes you think only line reactance matters and not resistance?  How does your simulation calculate voltage drop?  Surely there is a multiplication of complex current and impedance somewhere.

If loads are unbalanced, you must take this into consideration and factor in the impedance in the neutral/ground return path.
 

RE: Radial Network Voltage Profile

How can you possibly have a voltage drop if

Quote:

In my simulation there are no conductor size and types of conductors modelled.

Makes no sense what so ever.

RE: Radial Network Voltage Profile

Wireless power transfer? :P

RE: Radial Network Voltage Profile

a Tesla investigation? :)

RE: Radial Network Voltage Profile

(OP)
Hey guys, apologize for the misunderstanding. In my simulation, I just need to specify the lines MVA limits and I guess that will automatically adjust the size and conductor types, the settings are transparent to me.

jghrist,

As far as what I understand, the reactive power affects the voltage and active power flow is affected by phase angle.

RE: Radial Network Voltage Profile

Homework problem?

RE: Radial Network Voltage Profile

(OP)
Yes, but I just want to have discussion to get more insights. Is that violating the forum rules here?  

RE: Radial Network Voltage Profile

Yes.  

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