TenneT could be convinced by the efficiency of Siemens Energy‘s phase-shifting transformers and is going to install the first 4 units in the southern substation of Wuergau and 4 more in Krempermarsch, in the northern part of Germany. For the stability of two 4000 A lines, customized phase-shifting transformers suitable for rail transportation, have been ordered. They have a compact design for the high performance level of 1420 MVA each, at a rated voltage of 410 kV and a highest possible phase angle of ±24°. Furthermore, phase-shifting transformers from Siemens Energy are very quiet and have low losses, at the lowest possible impedance. The combination of high rating, high phase angle and low impedance with limited product size was the biggest technical challenge for the Siemens Energy engineers.
Additionally, Siemens Energy was awarded a framework contract for the delivery of further phase-shifting transformers. Design, assembly, transportation, installation, and commissioning of the 8 phase-shifting transformers already ordered will be executed by the two factories in Weiz, Austria and Nuremberg, Germany. Both factories are well connected to the German railway network. Furthermore, the parallel production, by the two factories, will ensure the tight delivery schedule can be met.