Electricity cables feeding power to homes in Mid Wales and Shropshire are set to be connected to new Welsh wind farms.
National Grid has announced that the Welsh Assembly Government-backed work is due to be completed by 2015 and will involve an infrastructure of 132,000 volt connections generated by the renewable energy plants.
The political body has previously identified Wales as being a key location for wind farms, however there is currently no network capable of carrying such large amounts of power.
National Grid will be responsible for the substation and 400,000 volt connections, while residents will get the chance to voice their opinions on what locations and routes the new system will take.
Peter Bryant, National Grid project manager, said: "We appreciate this is a significant development and we are committed to listening to the views of local people before we make any decisions."
Last month, National Grid was responsible for transporting a 270-tonne transformer from Holme Road Docks to Howwick Cross Lane in Penwortham.
Posted by Jason Page