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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 ...
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]
A power outage (also called a power cut, a power out, a power blackout, power failure or a blackout) is a loss of the electric power to a particular area. Power failures can be caused by faults at power stations, damage to electric transmission lines, substations or other parts of the distribution system, a short circuit , cascading failure ...
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.
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The first is owned and maintained by SP Energy Networks, a subsidiary of Scottish Power, and the other by SSE. However, National Grid plc remained the System Operator for the whole British Grid until the creation of the National Energy System Operator on 1 October 2024.