Spanish engineering and technology group Sener is leading a consortium to advance the next generation of high‑voltage direct current (HVDC) offshore electrical infrastructure under a new R&D initiative known as CONECCMAR.
Launched in early 2026, the two‑year programme brings together Sener, Seaplace, the Instituto de Investigación Tecnológica (Universidad Pontificia Comillas), CoreMarine, Deep Insight Blue and Ravenwits. The project aims to strengthen Europe’s offshore grid capabilities to support rapid expansion of wind power in deeper waters.
CONECCMAR focuses on three core research areas: floating HVDC substations based on innovative design concepts; compliant fixed structures for deep‑water applications; and hybrid multi‑terminal HVDC interconnection nodes capable of linking multiple offshore substations to onshore grids at different landing points. The consortium will combine applied research and advanced modelling to define technical and functional criteria that could guide future commercial deployments.
An advisory group comprising Acciona Energía, Naturgy and Navantia Seanergies will provide strategic support, ensuring the technologies under development align with the evolving needs of Europe’s power system. Spanish grid operator Redeia has also expressed support for the initiative through a formal letter of endorsement.
The project is co‑financed by the Community of Madrid and the European Regional Development Fund (ERDF) under a flagship R&D&I grant programme promoting collaboration between public and private partners.
By developing new knowledge in marine HVDC systems, CONECCMAR aims to help create robust offshore electrical networks that can integrate floating and fixed‑bottom wind farms within multi‑country energy systems.
