Voltage behavior in UG cables and OH 11 KV distribution lines

AI Thread Summary
The discussion focuses on the voltage behavior in 11 kV underground and overhead distribution lines under various load conditions, including no load, partial load, and full load. Participants emphasize the importance of understanding electrical concepts such as inductance and capacitance, as well as the need for consulting with a power engineer for accurate analysis. The complexity of the subject is acknowledged, with a suggestion to study power system analysis for better comprehension. Differences in cable capacity between overhead and underground systems are noted, particularly regarding their impact on long runs and phase shifts. Overall, a solid foundation in electrical principles is essential for effective voltage regulation in these systems.
Ali Raza
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i want to know the behavior of voltage in 11 KV underground and OH distribution line at different load conditions i.e. no load-full load ...
 
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hi there
welcome to PF :smile:

your question is quite vague ... what type of behaviour are you referring to/wanting to know about ?
 
davenn said:
hi there
welcome to PF :smile:

your question is quite vague ... what type of behavior are you referring to/wanting to know about ?
I meant the change in voltage and other parameters i.e. inductance, capacitance etc in case of different loading like no load , partial loading or full load, and what measures can be taken to prevent any such change .
 
You want to regulate voltage on cables and OH lines. You need to consult with a power engineer, or to study power system analysis enough to do your own engineering.

Answer to questions such as the OP are unlikely to be complete enough to make good choices.
 
anorlunda said:
You want to regulate voltage on cables and OH lines. You need to consult with a power engineer, or to study power system analysis enough to do your own engineering.

Answer to questions such as the OP are unlikely to be complete enough to make good choices.
Thank u i am trying ...
 
that's not a one afternoon subject.
On the other hand, it's just the laws of Kirchoff and Ohm ...

First one learns the vocabulary
next the basic physical concepts
then the "shorthand" that designers employ to keep the calculations manageable.

As with any field of study It'll take time to become fluent.

One might start here:
http://www.electricalmanuals.net/files/APP-MANUALS/GE/GET-1008L.pdf
 
Last edited by a moderator:
One obvious difference between overhead and underground cabling will be the Capacity between the conductors. This can have a very significant effect on very long runs, due to phase shift (/power factor).
 

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