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Siemens Energy to deliver HVDC technology for SuedLink [free access]

August 23, 2021

Siemens Energy has been awarded a contract to provide its high-voltage direct current (HVDC) technology for SuedLink, one of the largest energy infrastructure projects in Europe and the third HVDC corridor project in Germany.


The 2 GW SuedLink underground power cable corridor will run from the northernmost federal state of Schleswig-Holstein through western Lower Saxony, northern Hesse and southern Thuringia, to Bavaria and Baden-Württemberg in South Germany. Transmission grid operators TenneT and TransnetBW are developing the project.


The transmission system will comprise two ±525 kV underground HVDC cables, both originating from Schleswig-Holstein. Both the routes will run parallel to the central trunk road. One route will originate in Wilster in Schleswig-Holstein and lead to the Grafenrheinfeld area in Bravia, while the other one will stretch from Brunsbüttel in Schleswig-Holstein to Großgartach in Baden-Württemberg. 


Siemen’s contract is for the section between the grid interconnection points of Brunsbüttel in Schleswig-Holstein and Leingarten/Großgartach in Baden-Württemberg. The company will supply the convertor stations and carry out detailed and site-specific planning of the facilities.


The SuedLink converters will be designed as self-commutated voltage-sourced converters in a modular multilevel converter (MMC) arrangement with a rated DC voltage of ±525 kV.