DNV GL and TenneT sign 4-year framework agreement for project certification of High Voltage Direct Current (HVDC) substations in German North Sea. Agreement includes certification of TenneT’s DolWin5 converter platform with cost-saving offshore grid connection concept
HAMBURG, Germany 4th September 2019 – DNV GL and TenneT, a leading European electricity transmission system operator (TSO), have signed a four-year framework agreement covering project certification of new high-voltage direct current (HVDC) substations in the German North Sea. TenneT awarded DNV GL the contract following an independent EU tendering process.
Under this framework agreement, DNV GL is expected to carry out project certification for upcoming TenneT’s HVDC platforms, representing a cost-saving grid connection concept which will be applied for connecting offshore wind farms to some of TenneT’s upcoming German offshore converter platforms for the first time. Project certification will be performed according to the BSH Standard Design, in order to verify compliance with requirements of the German Federal Maritime and Hydrographic Agency (BSH).
The agreement includes the certification of the planned DolWin5 converter platform which features a grid connection concept for wind farms that could dramatically reduce costs for the offshore wind industry. 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. With its certification services DNV GL creates confidence among all project stakeholders in terms of reliable quality, stable operation and proper risk management of wind farms.
About DNV GL
DNV GL is a global quality assurance and risk management company. Driven by our purpose of safeguarding life, property and the environment, we enable our customers to advance the safety and sustainability of their business. We provide classification, technical assurance, software and independent expert advisory services to the maritime, oil & gas, power and renewables industries. We also provide certification, supply chain and data management services to customers across a wide range of industries. Operating in more than 100 countries, our experts are dedicated to helping customers make the world safer, smarter and greener.
DNV GL delivers world-renowned testing, certification and advisory services to the energy value chain including renewables and energy management. Our expertise spans onshore and offshore wind power, solar, conventional generation, transmission and distribution, smart grids, and sustainable energy use, as well as energy markets and regulations. Our experts support customers around the globe in delivering a safe, reliable, efficient, and sustainable energy supply.
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