Swiss hybrid lines in the public eye


Under the national “Energy Turnaround” research programme (NRP 70), the “Hybrid overhead power lines for Switzerland” project implemented by the ETH Zurich, one of the leading universities for technology and the natural sciences, is supported by TSC member Swissgrid, the Swiss transmission system operator (TSO). The project is about the combination of direct and alternating current systems to increase the transfer capacity of existing 380kV overhead lines and became publicly known at the 10th Energy Research Conference held in Lucerne, Switzerland, on 14 and 15 April.

> See Swissgrid press release (html)

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New HVDC technology for Ultranet


Ultranet is a part of one of the three planned high-voltage direct current (HVDC) powerlines to run from the north to the south of Germany and therefore a mainstay of energy transition. TSC members Amprion and TransnetBW, two of the four German transmission system operators (TSOs), today have revealed the advanced technology behind the ULTRANET converter together with their technology partner Siemens. The converters at either end of the 340kilometre transmission line with their new “full bridge technology” will have a transmission capacity of 2,000MW each and are designed to make power transmission more secure and to lower power losses.

> See Amprion/TransnetBW press release in German (pdf, 33kb)

> See Amprion/TransnetBW press release in English (pdf, 134kb)

Picture ( Eperts explaining the full bridge system for power lines


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Largest DC grid connection of the world


Today, Siemens handed over the world’s largest direct-current grid connection in Germany to the Dutch-German TSO TenneT, a member of TSC. The transmission capacity is 800 megawatts (MW) – enough to supply about one million households. The offshore platform of the BorWin2 grid connection using Siemens’ HVDC Plus technology is located northwest of the German island of Borkum in the North Sea. It is said to be “the first offshore grid connection worldwide to take up commercial operation with efficient direct-current technology”.

> See Siemens press release (html, in English)

> See TenneT press release (html, in German)

Illustration using a press picture of Siemens AG


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