SuedLink HVDC Transmission: Transforming Renewable Energy Infrastructure with Geotechnical Modelling

SuedLink, a groundbreaking 700 km underground cable for HVDC transmission, plays a pivotal role in Germany's renewable energy transition, transmitting 4 GW of clean energy from the north to the south. As part of this EU Trans-European Network initiative, SuedLink connects Germany’s energy network with the NordLink subsea line, bolstering the region's climate and carbon-neutrality goals. Fugro was contracted to provide end-to-end geotechnical and geo-environmental services for two major segments, A4 and B1, spanning 105 km.

Fugro’s multi-disciplinary team conducted site investigations, geotechnical modelling, environmental impact assessments, and hydrological studies to optimize the cable route, ensuring minimal ecological disruption. Key innovations included a novel soil thermal conductivity model to mitigate heat transfer issues from HVDC cables and a 3D dewatering framework to preserve agricultural lands and watercourses. Extensive stakeholder engagement with landowners and regulatory bodies helped build trust and ensured smooth project execution.