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The National Grid is the high-voltage electric power transmission network supporting the UK's electricity market, connecting power stations and major substations, and ensuring that electricity generated anywhere on the grid can be used to satisfy demand elsewhere. The network serves the majority of Great Britain and some of the surrounding islands.
The link augments the existing capacity provided by double-circuit AC transmission lines which join the Scottish and English transmission grids. It consists of 422 km (262 miles) of cable, of which 385 km (239 miles) is under water. [1] It is the first subsea link at 600 kV. [8]
Note that the National Grid in Scotland includes lines operating at 132 kV, but they are not included in this diagram for consistency. Onshore and offshore wind farm connection cables at 220 kV and above are included even if they are not operated by the National Grid.
The 275/400 kV grid and substations in England and Wales are owned and operated by National Grid Electricity Transmission. It also operates the grid and substations in Scotland although the systems are owned by ScottishPower and Scottish & Southern Energy. In Northern Ireland grid and substations are owned and operated by Northern Ireland ...
At the same year, Scottish Hydro Electric Transmission filed planning application and started public consultations. [3] Originally, the cable was planned to run from Shetland to 320 km (200 miles) to Portgordon on the Scottish mainland, [3] [4] [5] and then on to Blackhillock substation, near Keith, Moray via 25 km (16-mile) underground cable.
The company has its origins in two public sector electricity supply authorities. Scottish Hydroelectric, founded as the North of Scotland Hydro-Electric Board in 1943, was established to design, construct and manage hydroelectricity projects in the Highlands of Scotland, and took over a further generation and distribution responsibilities when the UK's electricity industry was nationalized in ...
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Scottish Power Limited, trading as ScottishPower, is a vertically integrated energy company based in Glasgow, Scotland. [1] It is a subsidiary of Spanish utility firm Iberdrola . ScottishPower is the distribution network operator for Central and Southern Scotland , Merseyside , North Wales and parts of Cheshire and Shropshire . [ 2 ]