From point-to-point to system integration
Hvordan Viking Link og CobraCable viser vejen mod næste generation: Energiøerne
CobraCable (DK–NL) and Viking Link (DK–UK) are classic HVDC interconnections. They link two markets and enable efficient energy exchange, particularly during periods of surplus wind power production. The structure is clear and linear.
This type of infrastructure has significantly increased the robustness of European energy markets.
However, at a time when offshore wind deployment is accelerating and energy markets are becoming increasingly complex and interconnected, it is evident that the point-to-point model alone will not define the future.
Europe needs hubs — not just connections.
Energy islands: a new architecture for Europe’s power grid
The Bornholm Energy Island represents a fundamental shift in how energy infrastructure is designed and built.
An energy island is not a transmission link — it is a platform.
Europe needs hubs, not just connections.
A platform where generation, conversion, control, and trading are integrated into a single system.
Lessons from Viking Link and CobraCable — and why they point toward energy islands
Work on Viking Link and CobraCable has provided deep insight into the complexity of large-scale HVDC installations and into how cross-border coordination works in practice.
These experiences make it clear why energy islands are the next natural step:
- Scale increases significantly when multiple wind farms and countries are connected simultaneously
- System integration becomes just as critical as cable installation
- Requirements for operation, control, and commissioning grow substantially
- Collaboration models become far more multinational
With energy islands, Europe moves from linear projects to multinational energy platforms.
Energy Island is not a transmission - it's a platform.
A place where production, conversion, management and trade are tied together in one system.
Why Bornholm will be a turning point
When the Bornholm Energy Island is commissioned, it will mark the beginning of a new generation of energy infrastructure.
Bornholm will not only serve as a connection point for offshore wind — it will become a strategic energy hub for the entire region.
Denmark and Germany will be linked through a single integrated solution, with future connections to Sweden and Poland built on the same foundation.
Energy islands represent Europe’s next step toward a connected supergrid, where power does not simply flow — but is controlled intelligently, securely, and flexibly.
- Scale increases significantly when multiple wind farms and countries are connected simultaneously
- System integration becomes as important as cable installation
- Operation, management and commissioning requirements are growing significantly
- Collaboration models are becoming much more transnational
With energy islands, Europe is moving from linear projects to multinational energy platforms.
Why Bornholm will be a turning point
When Bornholm Energy Island is ready, it will mark the start of a new generation of energy infrastructure.
Bornholm will not only be a connection point for offshore wind - but a strategic energy hub for the entire region, where Denmark and Germany are connected through a single solution and future connections to Sweden and Poland can be built on the same foundation.
Energy islands will be Europe's next step towards an interconnected supergrid where power doesn't just flow - but is managed intelligently, stably and flexibly.
About Sirius Energy
Sirius Energy is a Danish consultancy specialising in energy infrastructure, high-voltage systems, offshore wind, commissioning, site management, and complex technical installations.
- HVDC interconnections
- Onshore and offshore substations
- Energy islands and hybrid infrastructure
- Data Center
- Power plants and other advanced technical facilities
Our consultants are maskinmestre and technical specialists with hands-on experience from some of Europe’s most demanding energy projects — covering installation, testing, commissioning, operation, and project management.
We help our clients ensure that critical energy infrastructure is planned, constructed, and delivered safely, efficiently, and in accordance with the highest technical standards.
