|
Author(s): Nelson Theethayi & Rajeev Thottappillil
Abstract:
Surge propagation in underground systems has been a subject of interest for many
power and telecommunication engineers.
Any typical buried electrical installation
involves cables (power or telecommunication) and grounding systems.
The
cables could have multiple shields and multiconductor configuration for the core
with either twisted or non-twisted conductors.
The grounding conductor system
could have counterpoise, rods, grids, etc.
Interestingly, all these conductor systems
could be modelled as multiconductor transmission line (MTL) systems for
the wave propagation studies.
In this chapter, we shall see how they can be modelled
for transmission line analysis using the Telegrapher’s equations as discussed
in Chapters 1 and 2.
A brief discussion on crosstalk mechanisms will also be
given, even though the analysis for crosstalk in MTL systems is similar to that in Chapter 2.
1 Introduction:
Before we begin this chapter, it is good to visualize some practical problems
that constitute a buried conductor system.
In power and railway systems, we
have cables used for bulk power transmission and signalling/telecommunication
purposes.
Every high-voltage power transmission tower has a long running
counterpoise wire [1, 2] in the ground connected to the foot of the tower.
The
main purpose is to divert the lightning stroke current directly to the counterpoise
wire.
This is particularly important when the potential at the tower top
or at the footing is of interest.
Moreover, in the substation, there are complex
grounding systems, which include counterpoise wires, buried rods and buried
grids/meshes.
To get a broader insight into the problem, let us take an example
...
Pages: 42
Size: 5,148 kb
Paper DOI: 10.2495/978-1-84564-063-7/03
|
|
Download
the Full Article
Price: US$
50.00
You can purchase the full text version of this article in Adobe PDF format for the above price. Please click the 'Buy Paper' icon below to purchase this paper.
 Send
this page to a colleague.
|
Home
Follow WIT Press
WIT Press on Twitter
Wessex Institute of Technology on Blogspot
