Project planning and construction of Raskiftet wind farm in Norway

In December 2018, OX2 handed over the 112 MW Raskiftet wind farm to its purchasers Stadtwerke München, Eidsiva Energi and Gudbrandsdal Energi on schedule. The project is the first to be built in inland Norway.


Raskiftet wind farm, with a total of 31 wind turbines, is located on the western side of Osensjön lake in Trysil and Åmot municipalities. The area is a 15-km long ridge with mountain peaks and escarpments as well as lowland areas of forest and wetlands.


Construction of Raskiftet wind farm (112 MW) in Norway was completed in 2018.

Project planning and construction of Raskiftet wind farm in Norway

Construction of Raskiftet wind farm (112 MW) in Norway was completed in 2018.

In December 2018, OX2 handed over the 112 MW Raskiftet wind farm to its purchasers Stadtwerke München, Eidsiva Energi and Gudbrandsdal Energi on schedule. The project is the first to be built in inland Norway.


Raskiftet wind farm, with a total of 31 wind turbines, is located on the western side of Osensjön lake in Trysil and Åmot municipalities. The area is a 15-km long ridge with mountain peaks and escarpments as well as lowland areas of forest and wetlands.


Watch the construction video of Raskiftet wind farm.

“The wetlands in particular were a challenge when we were laying out the site, as they have to be avoided for both construction and environmental reasons. Technically, it is a large area with varying terrain and very different conditions existing between the different turbine positions. This meant that the choice of turbine and how the turbines would be placed, both individually and in relation to each other, was of extreme importance. We devoted much time to producing a detailed design based on, for example, wind conditions, turbulence, ground conditions and the suitable placement of crane sites and roads,” says Ulf Tollaksen, the responsible project engineer at OX2.

When OX2's engineering team optimises the turbine configuration at a wind farm, it starts from the combined experience of many projects and the latest research findings.

It is also able to rely on the best software available on the market, but it is still important to work in the field.

“The wetlands in particular were a challenge when we were laying out the site, as they have to be avoided for both construction and environmental reasons. Technically, it is a large area with varying terrain and very different conditions existing between the different turbine positions. This meant that the choice of turbine and how the turbines would be placed, both individually and in relation to each other, was of extreme importance. We devoted much time to producing a detailed design based on, for example, wind conditions, turbulence, ground conditions and the suitable placement of crane sites and roads,” says Ulf Tollaksen, the responsible project engineer at OX2.

When OX2's engineering team optimises the turbine configuration at a wind farm, it starts from the combined experience of many projects and the latest research findings.

It is also able to rely on the best software available on the market, but it is still important to work in the field.

“It was especially important to spend a great deal of time in the field with this project, to consider all possible layouts and options in consultation with OX2's construction department and the suppliers. The result is a facility that meets high demands for safety, output and availability with high production and reasonable costs,” comments Ulf.

Construction of the Raskiftet wind farm began in the autumn of 2016 with logging and road works. Several information meetings also took place.

“Raskiftet is the first wind power project to be built in inland Norway. The need for information and education has therefore been greater than usual and I have maintained extra close contact with local businesses, landowners and residents,” reports Johan Höök, construction project manager at OX2.

Facts about the project
Location: Trysil and Åmot,
Norway
Turbines: 31 Vestas
V126 3.6 MW
Expected production per year: 370 GWh
Owners: Stadtwerke München, Gudbrandsdal Energi,
Eidsiva Vannkraft
EPC supplier: OX2

“It was especially important to spend a great deal of time in the field with this project, to consider all possible layouts and options in consultation with OX2's construction department and the suppliers. The result is a facility that meets high demands for safety, output and availability with high production and reasonable costs,” comments Ulf.

Construction of the Raskiftet wind farm began in the autumn of 2016 with logging and road works. Several information meetings also took place.

“Raskiftet is the first wind power project to be built in inland Norway. The need for information and education has therefore been greater than usual and I have maintained extra close contact with local businesses, landowners and residents,” reports Johan Höök, construction project manager at OX2.

Facts about the project
Location: Trysil and Åmot,
Norway
Turbines: 31 Vestas
V126 3.6 MW
Expected production per year: 370 GWh
Owners: Stadtwerke München, Gudbrandsdal Energi,
Eidsiva Vannkraft
EPC supplier: OX2

Installation of wind turbine at Raskiftet wind farm.

Contact with the purchasers has also been close, something which is becoming increasingly common in construction projects.

“We have worked closely with the consultants who, on behalf of the purchasers, reviewed and followed up every detail of the project and the daily work at the site,” explains Johan.

The roads, internal electricity grid and bases for the wind turbines at the farm were completed in 2017. The 17-km long 132 kV overhead power line and the transformer station were completed in June 2018. During the summer, the Vestas wind turbines arrived by boat at Uddevalla harbour in Sweden. From there, they were transported on trucks 500 km to the construction site. The farm was commissioned in the autumn and handed over to the purchasers in December.

“It is fantastic. It has been a very rewarding project and I am taking many lessons away with me. What I find most satisfying is how well the facility has been adapted to the external conditions and built with great consideration given to nature,” concludes Johan.

Installation of wind turbine at Raskiftet wind farm.

Contact with the purchasers has also been close, something which is becoming increasingly common in construction projects.

“We have worked closely with the consultants who, on behalf of the purchasers, reviewed and followed up every detail of the project and the daily work at the site,” explains Johan.

The roads, internal electricity grid and bases for the wind turbines at the farm were completed in 2017. The 17-km long 132 kV overhead power line and the transformer station were completed in June 2018. During the summer, the Vestas wind turbines arrived by boat at Uddevalla harbour in Sweden. From there, they were transported on trucks 500 km to the construction site. The farm was commissioned in the autumn and handed over to the purchasers in December.

“It is fantastic. It has been a very rewarding project and I am taking many lessons away with me. What I find most satisfying is how well the facility has been adapted to the external conditions and built with great consideration given to nature,” concludes Johan.