competence in high voltage transmission line

8/13/2019 Competence in High Voltage Transmission Line

1/8

Competence in High Voltage

Transmission Lines

Transmission grids

EHV/HV-overhead lines and cable systems


2/8

2

SAG-Group

Specialist for energy supply networks

and systemsThe name SAG stands for large-scale as well as specialist service and systems know-how in the field

of energy technology. Since it was founded in 1916, the company has been closely involved with the

construction and development of electricity distribution networks in Germany and internationally.

A fundamental part of our business has always been the high voltage overhead transmission line

construction, which is managed worldwide by SAG.

Your Partnerfor Energy related

Infrastructure

With approximately 8,000 employees, the

SAG Group generates an annual turnover of

around 1 thousand million. The core markets

are Germany and neighbouring countries in

Western and Central Europe as well as project-

related business in other European countries

and worldwide. SAG has more than 100 loca-

tions in Germany to underline its nationwide

presence.


3/8

3

Profile

Based on decades of experiences, SAG is one of

the main players in energy infrastructure construc-

tion, delivering customised state-of-the-art solu-

tions for all links in the asset management and

asset service value chain.

The companys various business units focus on:

the design, construction and maintenance

of turnkey transmission lines and substations,

the supply of customised automation

and geographic information systems, and

the development of IT-assisted asset manage-ment and maintenance concepts.

Turnkey projects

SAG offers a complete single-source solution for

even the most ambitious infrastructure projects,

where the erection of high voltage overhead trans-

mission lines plays a crucial role. Overhead lines

transport electric power over great distances

from its source, across a variety of networks,

to centres of public and industrial consumption.

They are therefore an essential component in

large-scale energy supply infrastructures, whosevoltages are virtually standardised in Europe and

extend up to 500 kV.

The full-service portfolio of SAG is based on

our competence, which is vendor independent,

together with our detailed knowledge of the pro-

cesses, operating resources and technical systems

involved in network operation.

Solutions for new requirements

Two factors have been responsible for bringing

about the changed requirements that have encou-

raged the construction, upgrading and replace-

ment of transmission lines in recent years:

the continued expansion of cross-border grid

systems, and the structural changes taking place

within transport and distribution infrastructures

as a result of the increased utilisation of regener-

ative energy sources, especially wind energy.

SAG actively updates its product and service port-

folio to meet the latest market conditions. We aimto offer our customers the most reliable, powerful

and cost-effective solutions, which always take

into consideration the entire life cycle of the oper-

ating resources. This applies equally to transmis-

sion grid operators and regional suppliers, or

German Railways and energy-intensive indus-

trial companies.

The principle of networked competence

The principle of networked competence is the

guiding principle for SAGs transmission line

construction activities. Especially on turnkeyprojects, the transmission lines business unit

cooperates closely with our other corporate

business units, other SAG Group companies at

home and abroad, and with the vendors and

customers themselves. SAGs transmission lines

business unit is well represented in the market

via subsidiaries, regional offices and local partner

companies. Our principle German sales and

service support centres are located in Montabaur,

Langen, Ergolding and Gifhorn. The Export section

at our corporate headquarters in Langen looks

after our fast-growing international business.


4/8

4

Our product programme

A portfolio meeting highest standards

Construction of transmission lines is an individual and complex business. Each project requires

different national and corporate standards and specifications. These are challenges that SAG is

fully equipped to meet, with its expertise and maximum flexibility and its comprehensive and

in part unique range of products and resources.

Transmission lines are used everywhere to carry

electricity safely, reliably and economically from

the producer to the consumer. However, there are

often substantial differences in the way these

power lines are designed and constructed.

This applies to tower types, span length, conduc-

tor configuration and sag of conductors.

Specific standards

In addition to comply with the statutory and net-

work-specific regulations, we have to take into

account local conditions, which are often linked

to protect the environment. As a leading turnkey

supplier of transmission lines up to 500 kV, SAG

provides effective and individual support for the

network operators.


5/8

5

Our product programme

The key areas of our product programme are:

Project management

Design, planning and engineering

Material supply

Finding a route, survey, soil investigation,

foundation construction, tower erection and

conductor stringing

Commissioning

Modernisation

Maintenance

Incident management

Extensive resources

SAG enjoys an outstanding reputation in the

field of transmission line construction thanks

to its expertise in turnkey installations, its in-

depth personnel and technical resources and

its keen service.

These comprise:

approximately 300 highly qualified staff

universally deployable plant and equipment

resources

a wide range of powerful IT tools

our own planning and engineering office a vendor-neutral test and technology centre

Upgrading and replacement

SAG is the leading partner in ambitious domestic

and international projects for upgrading or re-

placing transmission lines. In Germany, there is

increasing emphasis on upgrading existing lines

and rebuilding lines on existing routes. This

approach offers a host of benefits for the network

operator:

Upgrading from 220 to 380 kV improves

operational and cost efficiency.

Renovating the trusses can increase the life

of transmission towers by over ten years.

Stringing with new, more efficient conductors

enables higher power to be carried.

The time and expense required to gain official

approval is minimised.

Turnkey erection as a general contractor

In many countries outside Germany, investment in

the transmission grid means completely new trans-

mission lines to feed the power from additonal

power stations into the gr id. Economic growthleads to a growing demand for energy, which ex-

isting lines are unable to handle. Also, there are

the plans to link to the national grids of neighbour-

ing countries.

SAG normally acts as general contractor for these

kinds of projects from planning through to

commissioning. We usually involve local partners

in carrying out the foundation and installation

work. Our CeGIT business unit attends to in route

planning while our substations business unit links

new sections of lines to local distribution net-works and substations.

SAG research and technology center

The VTZ (SAG research and technology center) in

Langen works on project-related tasks as well as

undertaking special assignments commissioned

by energy providers and suppliers. The institute is

accredited for the European market and tests com-

ponents, sub-assemblies and complex systems in-

volved in electricity distribution. It also develops

new procedures for renovating and modernising

existing network infrastructures.


6/8

6

References

Turnkey and customised concepts

Turnkey solutions and customised concepts are playing an increasingly important role in the

construction of transmission lines both in Germany and in international markets. For this reason,

transport and distribution network operators choose to take advantage of the capable service and

operational know-how and resources of SAG, as the following reference projects demonstrate.


7/8

7

References

Electrogaz:

Expansion in Rwanda

Rwanda is consolidating its

energy infrastructure and

one of the latest projects for

which SAG is the acting general contractor invol-

ves the construction of a brand new 110 kV over-

head power line in the western part of the coun-

try. The new route runs over 15 extremely hilly

kilometres between Kibuye and Karongi. This

investment forms part of the project to generate

electricity from the methane gas recently dis-covered below Lake Kivu. The turnkey contract

awardred to SAG encompasses planning, the sup-

ply and erection of the high-voltage transmission

line and two substations, and training for the per-

sonnel of Electrogaz, the state electricity provider.

Nepal Electricity Authority:

Shipping long-distance to

the transmission line

Nepal is adding to its energy

generation capacity with the

construction of a 72 megawatt run-of-river powerstation located approximately 150 kilometres

west of Kathmandu. A turnkey 38.5 kilometre,

132 kV overhead transmission line to be erected by

SAG for the Nepal Electricity Authority will carry

the power to the grid. From the power station, the

line will cross the Marsyangdi River ten times

before reaching a substation in the neighbouring

mountains. Above the valley, SAG is also building

a six-kilometre 33 kV line to the regional supply

grid. The numerous component parts required will

be shipped to the area from Calcutta, over 1,000

kilometres away.

Fingrid Oyj:

New construction in Finland

As part of the project to

expand the use of atomic

power in Finland, network

operator Fingrid Oyj has upgraded its 220 kV net-

work to 400 kV and at the same time extended its

routes. Working under occasionally quite extreme

climatic conditions, SAG supplied a turnkey

86-kilometer long 400 kV line linking the towns

of Toivila and Vihtavuori in central Finland. The

contract included planning, tower construction,conductor stringing and the dismantling of an old

220 kV line. SAG was also responsible for intern-

ational procurement, liaison with the local

authorities and quality inspection and testing by

the company's own test and technology centre.

Electricity Supply Board:

Renovation in Ireland

To ensure the security of

supply well into the future

and to reduce the risk of

unexpected expenditures on repair work, the IrishElectricity Supply Board has modernised its entire

medium voltage network over the past few years.

SAG was involved in this logistically highly com-

plex project with a framework contract for

2,200 kilometres. The full-service package includ-

ed the replacement of wooden poles, conductors,

fittings, insulators and transformers. To improve

the stability of the grid, the main power lines were

upgraded from 10 to 20 kV.


8/8

SAG GmbH

Pittlerstr. 44

63225 Langen

Germany

T +49-6103-4858-370

F +49-6103-4858-361

E [email protected]

I www.sag.de

competence in high voltage transmission line

Documents