Four German transmission system operators—50Hertz, Amprion, TenneT, and TransnetBW—have forged a partnership with Siemens Energy, GE Vernova, and Hitachi Energy to pioneer the development of multi-terminal hubs equipped with direct current circuit breakers.
The initiative aims to interconnect new extra-high voltage direct current (HVDC) connections using DC switchgear and DC circuit breakers as the cornerstone of these multi-terminal hubs. This infrastructure will facilitate the efficient distribution of substantial wind power from the North Sea coast by linking DC lines and flexibly transporting energy to demand centers, the partners announced.
“This partnership marks a significant step in shaping the future infrastructure,” stated TenneT's Chief Operating Officer, Tim Meyerjürgens. “With 70 gigawatts (GW) of offshore wind energy planned in the German North Sea, our focus is on efficiently bringing this energy ashore and distributing it throughout the country in the most cost-effective manner.”
The innovative approach not only optimizes the use of DC lines but also supports the existing alternating current (AC) grid, which serves as the primary backbone for energy transmission, the consortium emphasized. By linking power lines innovatively, the initiative aims to minimize environmental footprint and stabilize energy costs, according to the partners.
“The electrification of our society with renewable energy sources is crucial for achieving climate neutrality,” highlighted Stefan Kapferer, Managing Director of 50Hertz. “Through this innovation partnership, we are setting a European standard for smart power hubs, connecting large-scale DC lines to create a robust DC grid instead of traditional point-to-point connections.”
The development of these multi-terminal hubs represents a unique technical concept in Europe, potentially advancing towards a climate-neutral grid of the future. The collaboration underscores a collective commitment to enhancing grid stability, supply security, flexibility, and overall resilience across Europe.
“This large-scale meshed DC grid is a pioneering effort,” added TenneT's Meyerjürgens. “Together, we are paving the way for a climate-neutral grid that can effectively integrate renewable energies and meet the increasing demands for grid stability and security of supply.”
