Sometimes tall 'trident'-shaped wooden poles with 3 cables. Also the voltage at which some larger onshore wind and solar farms supply their power to the distribution network. The voltage which National Grid supplies to distribution networks. Large, tall pylons, normally carrying two circuits (6 cables), interconnecting large, prominent substations. The vast majority, if not all, of these power lines are already mapped in Great Britain from NPE or OS.Ģ20kV is only used for undersea wind farm interconnectors and the Kintyre-Hunterston link in Scotland. National Grid Electricity Distribution is a distribution network operator in the Midlands, the South West, and South Wales.

National Grid ESO (Electricity Supply Operator) is responsible for managing the transmission network and balancing supply and demand across Great Britain.National Grid Electricity Transmission is responsible for maintaining the transmission network in England.There are 14 distribution network areas, currently operated by six different companies (Electricity North West, Northern Powergrid, Scottish and Southern Energy, ScottishPower Energy Networks, UK Power Networks, and National Grid Electricity Distribution), referred to as Distribution Network Operators or DNOs.Īs of 2022, National Grid Plc serves several functions in the UK's electricity network: The regional distribution networks distribute electricity from the National Grid to homes and businesses. In England and Wales, they are part of the distribution network. In Scotland, the 132 kV lines are part of the transmission network. It also includes the cables linking major offshore wind farms to the grid, which are owned by ' Offshore Transmission Owners'. It includes the various interconnector cables which import and export power from Ireland, France, Belgium, the Netherlands, and Norway using high voltage DC - these are owned by independent companies. It's run by National Grid in England, and Scottish Hydro and Scottish Power in Scotland (the 'Transmission Owners').

The transmission network consists of 400 kV, 275 kV, and a few 220 kV power lines, and their associated substations. The electricity network in Great Britain is split into two sections:

National Grid Substation Location Map