RTE Wins Work on Danish Bornholm Energy Island

RTE international (RTEi) has been entrusted with the modelling and simulation requirements and the specifications to de-risk the multi-vendor multi-terminal high voltage direct current (HVDC) functionalities for the Bornholm Energy Island (BEI) project in Denmark.


Planned by the Danish and the German TSOs, Energinet and 50Hertz, BEI will be set up in the Baltic Sea by 2030.

As a first step, the project will consist of offshore wind farms, which will have a total of 3 GW offshore wind capacity, located in Rønne Banke, connected to the AC substation at Bornholm Island.

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Additionally, HVDC interconnections running from Bornholm will connect to Zealand in Denmark and Germany, and potentially to more countries in the future, RTEi said.

According to the company, BEI has the potential to become the first multi-vendor multi-terminal DC link to be operational in Europe.

The project includes options for parallel operation on the AC, or multiterminal connection on the DC side.

“The challenges of this complex and innovative project lie in the need for detailed and thorough specifications in multiple aspects of system development, which will play a key role in maximizing the interoperability of an integrated system of multi-vendor, multi-terminal, and multi-stakeholder HVDC-connected OWPPs“, said Pierre Rault, RTE international HVDC expert.

“In order to establish these specifications and criteria, one should be adequately informed of the state-of-the-art technological development in HVDC power system engineering, electromagnetic transients (EMT) modelling and simulation, as well as supporting multi-vendor interoperability studies.”

RTEi has been contracted as a third-party consultant to perform gap analysis of Energinet’s existing project specifications and to adapt them accordingly for the Bornholm Energy Island project.

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According to RTEi, the key deliverables for this project are intended for use by Energinet directly in the tendering process for developing BEI.

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