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Siemens hands over the third North Sea grid connection SylWin1 to TenneT
Siemens has handed over the first four North Sea grid connections to its customer TenneT. The German-Dutch transmission grid operator has accepted the projects following successful completion of test runs by Siemens. The grid connections HelWin1 and HelWin2, BorWin2 and SylWin1 are therefore now in commercial operation. BorWin3, the fifth grid connection, which was contracted in spring 2014, is slated to go on-line in 2019. In June 2017 Siemens has been awarded with the grid connection DolWin6, which is scheduled to go into operation in 2023. About five million households will be supplied with electricity generated from wind power via this six links.

Press Pictures

HelWin 1: Interior view of a converter station in Büttel in Schleswig-Holstein

Siemens used identical HVDC Plus Power Modules here, the same as will be used for the COBRA converter stations.

HelWin1 land-based station in Büttel, Germany

The reactor room at the HelWin1 land-based station in Büttel, Germany, during the construction phase. Here, large reactors filter out undesirable oscillations in the wind-generated electric power. In January 2015 Siemens handed over to its customer TenneT the HelWin1 grid connection, which can supply more than 700,000 households with offshore wind power. HelWin1 is one of five North Sea grid connections that the German-Dutch transmission grid operator has contracted Siemens to build. On a large platform erected at sea off the coast of the German island of Helgoland, wind power generated offshore is transformed into low-loss direct current for transmission to land where it is converted back to conventional alternating current.

HelWin 1: Interior view of a converter station in Büttel in Schleswig-Holstein

The converter room of HelWin1 land-based station in Büttel. Here, the direct current transported to shore is transformed back into alternating current. In January 2015 Siemens handed over to its customer TenneT the HelWin1 grid connection, which can supply more than 700,000 households with offshore wind power. HelWin1 is one of five North Sea grid connections that the German-Dutch transmission grid operator has contracted Siemens to build. On a large platform erected at sea off the coast of the German island of Helgoland, wind power generated offshore is transformed into low-loss direct current for transmission to land where it is converted back to conventional alternating current.

HelWin1 land-based station in Büttel, Germany

The converter room of HelWin1 land-based station in Büttel. Here, the direct current transported to shore is transformed back into alternating current. In January 2015 Siemens handed over to its customer TenneT the HelWin1 grid connection, which can supply more than 700,000 households with offshore wind power. HelWin1 is one of five North Sea grid connections that the German-Dutch transmission grid operator has contracted Siemens to build. On a large platform erected at sea off the coast of the German island of Helgoland, wind power generated offshore is transformed into low-loss direct current for transmission to land where it is converted back to conventional alternating current.

HelWin 2: Siemens hands over fourth North Sea grid connection HelWin2 to TenneT

The offshore platform HelWin2 alone, which has just gone online, can transmit up to 690 megawatts (MW) of green electricity, enough to supply nearly 900,000 German households. The offshore platform of the HelWin2 link is located about 85 kilometers off the northwest coast of the island of Helgoland from which it takes its name.

SylWin 1: Siemens hands over the third North Sea grid connection SylWin1 to TenneT

Electricity from the three wind farms Butendiek, DanTysk and Sandbank is transmitted to the mainland via the SylWin1 grid connection. Siemens installed the grid connection in high-efficiency DC technology for network operator TenneT. The combined total of 232 Siemens wind turbines linked to the grid connection will provide enough electricity to supply more than one million households in the future. From the platform, there are wind turbines in view as far as the eye can see.

Infographics

Siemens connecting roughly 5 million households to offshore power

Siemens is now implementing a total of six DC North Sea grid connections for TenneT. The earlier projects were HelWin1 (576 MW) and HelWin2 (690 MW) off the coast of Helgoland, BorWin2 (800 MW) off the coast of Borkum and SylWin1 (864 MW) off the coast of Sylt. These grid connections have been placed into service successively since 2015; the BorWin3 (900 MW) and DolWin6 (900 MW) are currently being executed. The grid connections equipped with Siemens technology now have a total transmission power of 4.7 gigawatts – enough to supply just under 5 million homes.

Two years of supplying electricity to a city like Hamburg - here's how much the Siemens-installed offshore grid links are transmitting

To date Siemens has commissioned 13 offshore grid connections with a total transmission capacity of more than 6,000 megawatt – enough to supply a city like Hamburg with power for two years.

Further Information

Contact

Christina Hümmer

Gas and Power

+49 (9131) 17-45722

Siemens Media Relations

Siemens AG

+49 (89) 636-36366

Link to this page
www.siemens.com/press/x-win