our comprehensive experience with successful retrofitting during operation for
transmission grid operators and large industrial plants, we see ourselves as a
reliable partner for these projects," says Tim Dawidowsky, CEO EPC
Projects at Siemens Gas and Power. "Thanks to the high technical quality
of our offer and our recognized skills, we are certain that the region will be
well prepared to meet the enhanced requirements resulting from the energy
Industrially treated and
purified air, known as "Clean Air," will be used instead of SF6 as
the insulating medium for the bus ducts. The
Clean Air technology will be used in all of the substation's bus ducts used for
connecting overhead lines and transformers as well as in the connecting lines
between the two switchgear. The compressed air-insulated components, which can
also be used at high operating voltages, have significant benefits over other
insulating media. Because operation with compressed air is much more
climate-friendly, the retrofitted Daxlanden substation will save
approximately 450 million CO
2 equivalents (kg). The switchgear,
which emit no toxic decomposition products, can be operated with no additional
measures even at extreme temperatures and if malfunctions occur. Operators no
longer need to report the quantities of fluorine gas used, while at the same
time the quality of service increases. The lower dielectric strength of
compressed air is compensated for by appropriately adapted housing dimensions.
The transition to a new
energy mix is presenting the German transmission grid with enormous challenges.
While energy demand continues to grow, large power plant units in southern
Germany that no longer meet the requirements must be taken off the grid.
TransnetBW GmbH is a German transmission
grid operator within the EnBW Group and operates the grid in large parts of
Baden-Württemberg as well as in bordering areas of neighboring states.
Additional information on Siemens Gas and
Power can be found at
Additional information on high-voltage power
transmission can be found at