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“World’s longest” HVDC cable to link up UK

260-mile long subsea cable will link up Scotland, England and Wales

Iberdrola aims to provide extra transmission capacity in Scotland
Iberdrola aims to provide extra transmission capacity for renewables projects in Scotland

Spanish energy giant Iberdrola is to build the “world’s longest” High Voltage Direct Current (HVDC) cable in the UK, in an effort to increase the flow of renewable electricity at high-demand areas across the country. The subsea cable will increase transmission capacity between Scotland and England by 2MW, and allow grid access for 6GW of renewable projects in Scotland.

Due to be operational by 2016, the 260 mile long HDVC cable will run from Hunterston in Ayrshire, Scotland to a landing point in North Wales.

According to Iberdrola, the owner of one of the UK’s largest energy supplier’s, ScottishPower, the link will be the first sub-sea interconnector to use a DC voltage level of 600Kv. The extra voltage will allow electricity capacity to be increased, and reduce transmission losses.

The cable will also be bi-directional, allowing electricity to flow north or south according to future supply and demand.

Ignacio Galán, chairman of ScottishPower, said: “The HVDC link is a major project, with the electricity grid between Scotland and England already running close to maximum capacity. The additional capacity from this link will provide a significant boost to renewable energy projects being developed in Scotland.”