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In a consortium with Prysmian, Siemens Energy is to build a submarine DC interconnector in the Irish Sea. The order is worth more than € 1.1 billion for the consortium.

Customers are the British grid operator National Grid Electricity Transmission (NGET) and its Scottish counterpart Scottish Power Transmission (SPT), which founded the special-purpose joint venture NGET/SPT Upgrades Ltd. for this grid expansion project. The grid connection between Scotland and England, designed as a low-loss high-voltage direct-current (HVDC) transmission system, will have a rating of 2200MW. It will be the first submarine interconnector ever using a DC voltage level of 600 kV. The highest voltage level used to date was 500 kV. The power link will help to balance supply and demand within the grid sections in light of the continued growth of remote and fluctuating renewables. The link is scheduled to be operational by late 2015.
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