Statnett plans to upgrade the connection between Aurland and Sogndal from 300 to 420 kV by replacing an old transmission line with a new. A new 420 kV transmission line will also replace approx. 20 km of the 300 kV line between Hove and Sogndal.
Statnett plans to commission the new transmission lines in 2023, and to remove old lines the consecutive two years. The project will not make visible changes in Sogndal substation.
In south, the transmission line ends in Aurland I hydro power plant, fully owned by E-Co Energi AS. In line with EU legislation. Statnett, as Norway's transmission system operator, shall own all electricity transmission facilities. Parts of Aurland I are defined as transmission facilities today. In 2020 it will be decided which parts of the transmission facilities Statnett will purchase from E-Co Energi. Early 2020, Statnett will start a project to determine a solution for a reconstructed or new substation replacing today's transmission facilities in Aurland I.
The project will remove today's transmission lines in the Fardal and Øvstedalen hamlets. Statnett will redevelop the former substation to offices, stores and workshop for our operations division.
Increased benefit for the users of the transmission grid
Statnett expects a socio-economic benefit of the increased capacity of the connection between Aurland and Sogndal. New renewable energy production north of the Sognefjord, and the new connections to United Kingdom and Germany, will increase the bottleneck of today's connection. Without the project, Statnett expects increased price differences north and south of the Sognefjord, periods with price collapse and loss of water in hydro power plants. There is also a need for reinvestments in current facilities. The benefit of the project depends on future price of electricity and the volume of new electricity production north of the Sognefjord.