TenneT offshore HVDC platforms to receive DNV GL certification

Sep 6, 2019
Posted by Patrick Haddad

International classification group DNV GL has signed a four-year framework agreement with TenneT to provide project certification for new High Voltage Direct Current (HVDC) substations linked to offshore wind farms in the German North Sea.

The platform features an innovative connection concept to link, for example, the “Borkum Riffgrund West I and II” and “Northern Energy OWP West” wind farms to an offshore HVDC converter next to the windfarms.

The DolWin5 concept connects the wind turbines directly to the offshore platform via 66 kV cables. This removes the need for separate substations for each wind farm and the 155 kV cables previously used to connect the wind farm substation to the converter platform leading to huge cost savings. The platform is planned to start operations in 2024.

Tim Meyerjürgens, COO of TenneT, said: “This connection concept leads to an enormous cost reduction for the wind farms and the grid connection. With the 66-kV direct connection, we have developed a new generation of cost-efficient offshore grid connections for the German North Sea that will make an important contribution to the transformation of energy systems”.

“With the framework agreement, DNV GL and TenneT are partnering in qualifying this new connection technology in Germany. We are already involved in over 80% of German offshore wind projects and are committed to helping the global offshore wind industry to verify new products and technologies that improve the cost-effectiveness of wind power and enable the clean energy transition. To this end, we continue to write and define new standards to enable the certification of new technologies,” said Kim Mørk, Executive Vice President for Renewables Certification at DNV GL.

Source: Marine Link

Photo (for illustrative purposes): Alpha Ventus Windmills / SteKrueBe / Wikimedia / CC BY-SA 3.0


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