Construction and commissioning completed on the largest power line project in Norway

"Now Central Norway and Sogn og Fjordane can safely face winter, as we with the new 300 km long power line between Ørskog and Sogndal in operation, have established a connection that provides a reliable power supply for both regions," says Statnett Executive Vice President Elisabeth V. Vardheim.

The new power line facilitates value creation, reliable power supply and helps Norway reach its climate goals.

 

"This is an important day for Central Norway and Sogn og Fjordane. Central Norway finally has a good, secure power supply. At the same time, this can lead to realisation of the values in the planned renewables projects in Sogn og Fjordane, which have been waiting for a sufficiently robust power grid," says Vardheim.

 

Ørskog-Sogndal started as a pure supply line from Western Norway to Central Norway in 2006, due to a considerable energy shortage in Central Norway. It became necessary to change the concept during the process, as about 100 small-scale power plants in Sogn og Fjordane had applied for expansions. In 2009, Statnett had to halt the connection of new power generation in the region, due to a lack of grid capacity. This resulted in about 100 small-scale power plants waiting on hold.

 

"As a result of this, the project was expanded and we have changed the consept from expanding two substations to building six new ones and an expansion of Ørskog substation, in order to facilitate all the renewables projects. With its 300 km and 6 new substations, Ørskog-Sogndal is the largest power line project in Norway," says Vardheim.

 

Development of the project started at Moskog substation in October 2011. After five years of development, Statnett's largest project is complete and the installation is now operational. Despite delays as a result of disagreement regarding the route in Myklebustdalen, Bremanger, and challenges associated with weather and terrain, the project has been able to maintain progress, thanks to flexible contractors and particularly good collaboration with the regional grid companies. "Just one year has passed since we gained access to the last area in Myklebustdalen, and I would like to commend the contractors and project employees who have been able to complete this project, within the budget and despite the challenges," Vardheim concludes.

 

The project was completed within the stipulated cost framework, at a total cost of NOK 5.5 billion. 

Project facts

  • 300 km of 420 kV power line between Ørskog in Sunnmøre and Sogndal
  • 797 pylons. Total of 11 000 tonnes of pylon steel. Highest pylon is installed 1095 metres above sea level
  • 6 new substations and expansion of Ørskog substation
  • Removal of 170 km of existing power line. Facilitate removal of local distribution network. Redevelopment of Fardal substation
  • Development started October 2011. Commissioned 6 December 2016
  • Total of about 3 million hours worked, the equivalent of approx. 1800 full-time equivalents 

 

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