Conference,
DEWA 'S NEW 420 KV COMPACT LINE AS AN EXAMPLE OF MAXIMIZING CAPACITY OF OVERHEAD LINES IN AN URBAN ENVIRONMENT
(2007)
Abstract
New or upgraded transmission lines through urban
areas with an existing or growing infrastructure are
often a special challenge in respect to right of way
and disturbance constraints. With the progress in
the composite insulator technology, cost-effective
solutions exist in comparison to cable or gasinsulated
lines. The paper deals with a part of
DEWA's 420 kV line from Mushrif to Nahda substation
that required a compact monopole solution.
The first part of the paper covers the specific requirements
for the line section with the compact
monopoles. In the second part, the engineering for
an optimized design solution for the insulated
crossarm is described. The test results are presented
for both, the suspension and the angle
poles. The test programme was deduced from the
project specification and followed the relevant IEC
standards, when applicable. In a third part, a brief
comparison of the cost savings because of installation
easiness of the monopoles is tabulated.
DEWA's project has shown that a close cooperation
between the utility, the line designer and the
pole, as well as the insulator manufacturer can
provide optimal configurations with materials and
manufacturing technologies, which have been in
service since many years. This long-term experience,
also under the specific in-situ conditions of
DEWA's transmission network, is an important
feature in respect to the reliability and the outage
risk for strategically important lines.
The compact overhead line route has successfully
been installed during January 2007 to April 2007
and the commissioning was early summer 2007.
