About the project
Scottish and Southern Electricity Networks (SSEN), operating as Scottish Hydro Electric Transmission plc (SHET) under licence has plans to construct a new 400/275kV substation adjacent to the existing transmission line at New Deer, in the North East of Scotland.
The substation will originally be constructed to operate at a voltage of 275kV, with a view to being upgraded to operate at 400kV in the future. The transmission system in both the North East and East Coast of Scotland will be upgraded to 400kV over the next decade, in order to facilitate this, SSEN are proposing both upgrading the existing Overhead Line network in the region and installing new substations at various points.
These works are required to allow increased generation capacity access to the transmission system, while keeping the network fully operable and compliant with all necessary technical standards. Without these necessary reinforcements, the network cannot facilitate all generation connections.
Establishing a substation at New Deer addresses this issue and in effect increases the networks efficiency and capability. Power sharing across these circuits becomes more important as generation load increases on the system.