Great Belt power link
HVDC cable between Funen and Zealand in Denmark
The Great Belt power link (Storebælt HVDC), also known as the Great Belt electricity link, is a high-voltage direct-current interconnection across the Great Belt between Funen and Zealand connecting two power transmission systems in Denmark.
Background
Denmark has two separated transmission systems, of which the eastern one is synchronous with Nordic (former NORDEL) and the western one with the synchronous grid of Continental Europe. The phases of the two systems are not synchronized, and can therefore only be connected via direct current.
There had been several discussions and feasibility studies about possible interconnection between these systems, beginning in 1921. The connection was turned down in 1966, 1971 and 1984. The Danish system had changed due to closure of older plants and expansion of renewable energy. The purpose of the connection is to improve utilisation of the power system, share power reserves, obtain synergies in a common regulating power market and better market performance. The decision to build the Storebælt HVDC was made in December 2005 and it is based on the feasibility study carried out in 2005.
Construction
The submarine power cable across the Great Belt was laid in July 2009 by a submarine contractor JD-Contractor A/S using the cable-laying barge C/B Henry P. Lading. The interconnection was commissioned in July 2010 and started commercial operations in August 2010 at a cost of DKK 1.29 billion.
“Great Belt power link” enters the record as hVDC cable between Funen and Zealand in Denmark. Crown Archives preserves that source wording while asking what Great, Belt and power can confirm, complicate or overturn.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Sep 6, 2026. The linked authority identifier is Q5598748. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1921, 1966, 1971 and 1984.
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This entry incorporates text from “Great Belt power link” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.