Siemens to retrofit one of Germany’s largest substations

Germany: German transmission grid operator TransnetBW has commissioned Siemens to build new switchgear in the 380 kV Daxlanden substation in Karlsruhe, Baden-Württemberg.

Two new gas-insulated indoor switchgear, initially with 26 panels, will boost the substation’s transmission capacity and cover the increased transport demand in the German high-voltage grid as a result of the transition to a new energy mix.

In the future, it will thus be possible to transport large quantities of wind energy from northern Germany to the southern part of the country. Also, sulfur hexafluoride (SF6) will be replaced with treated air, so-called Clean Air, as the insulating medium in the bus ducts simultaneously ensures much more climate-friendly operation.

The commissioning of the turnkey solution will take place in stages and be completed in 2029.

During operation, the 400 kV outdoor switchgear with 20 panels will be gradually stripped down in the coming years. In its place, Siemens will build two gas-insulated switchgear (GIS) with 14 and 12 panels during the first expansion stage and 18 and 15 panels, respectively, in the final stage in Karlsruhe.

Source: Power Engineering International