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The Great Belt Power Link (Storebælt HVDC) is a high voltage direct current interconnection across the Great Belt between Funen and Zealand connecting two power transmission systems in Denmark. ==History== 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 transformers and direct current. There had been several discussions and feasibility studies about possible interconnection between these systems. 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.〔 〕 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. It was inaugurated on 7 September 2010.〔 〕 In the first months of operation, the connection has transferred power from West to East near full capacity.〔(2010 traffic data for Storebælt power ) ''Nord Pool Spot''. Retrieved: 13 December 2010. HTML disguised as spreadsheet.〕 Energinet.dk estimates that the connection will save consumers in East Denmark between 150 and 200 million kroner per year, while West Denmark will retain normal prices due to the strong connections with Germany and Norway.〔Frandsen, Morten. (East Denmark got cheaper power ) ''DR'', 18 October 2010. Accessed: 13 December 2010.〕 The Power Link has reduced the price variability in both East and West Denmark, and reduced the price in fossil fuel East Denmark.〔 The cable's effect on price change in West Denmark is disputed due to the strong connections with Germany and Norway.〔Kristensen, Søren Dupont. (German prices rub off in West Denmark ) ''Energinet.dk'', 19 november 2010. Accessed: 13 December 2010.〕 A researcher from Aalborg University claims that the reduced price variability has reduced the incentive for Smart Grids, and proposes that the bottleneck income is diverted from investments in physical grid to Smart Grid.〔Blarke, Morten Boje. (Consequences of Great Belt Power Link ) (in Danish) (Graphs ) page 13-14. ''Aalborg University'', 19 november 2010. Accessed: 13 December 2010.〕 In 2012, Energinet concluded that a second power cable would not be feasible,〔Kristensen, Søren Dupont. (New connection not feasible ) ''Energinet.dk'', 26 January 2012. Accessed: 7 May 2012.〕 but if decided, it could run between Studstrup Power Station, which lies north of the city of Aarhus and the power plant at Kyndby (Danish:''Kyndbyværket'') in Frederikssund Municipality.〔"(Nordic Grid Development Plan 2014 )" page 56, Document no. 13/81818 - 5. ''Nordic TSOs'', August 2014. Accessed: January 2015. 〕 In 2015, Energinet started considering a second cable again, due to lower expectations for stationary power in East Denmark.〔Wittrup, Sanne. "(Energinet.dk overvejer at bygge et nyt Storebæltskabel )" ''Ingeniøren''〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Great Belt Power Link」の詳細全文を読む スポンサード リンク
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